PHOTOGRAPHING LENS ASSEMBLY, IMAGE CAPTURING UNIT AND ELECTRONIC DEVICE

RELATED APPLICATIONS

This application claims priority to Taiwan Application 112147920, filed on Dec. 8, 2023, which is incorporated by reference herein in its entirety.

BACKGROUND
Technical Field

The present disclosure relates to a photographing lens assembly, an image capturing unit and an electronic device, more particularly to a photographing lens assembly and an image capturing unit applicable to an electronic device.

Description of Related Art

With the development of semiconductor manufacturing technology, the performance of image sensors has improved, and the pixel size thereof has been scaled down. Therefore, featuring high image quality becomes one of the indispensable features of an optical system nowadays.

Furthermore, due to the rapid changes in technology, electronic devices equipped with optical systems are trending towards multi-functionality for various applications, and therefore the functionality requirements for the optical systems have been increasing. However, it is difficult for a conventional optical system to obtain a balance among the requirements such as high image quality, low sensitivity, a proper aperture size, miniaturization and a desirable field of view.

SUMMARY

According to one aspect of the present disclosure, a photographing lens assembly includes six lens elements. The six lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.

Preferably, the object-side surface of the first lens element is convex in a paraxial region thereof. Preferably, the object-side surface of the second lens element is convex in a paraxial region thereof. Preferably, the fifth lens element has negative refractive power. Preferably, the object-side surface of the fifth lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the fifth lens element is convex in a paraxial region thereof. Preferably, the image-side surface of the sixth lens element has at least one inflection point.

Preferably, the photographing lens assembly further includes an aperture stop disposed between the second lens element and the third lens element.

When an axial distance between the object-side surface of the first lens element and an image surface is TL, a focal length of the photographing lens assembly is f, a focal length of the second lens element is f2, a focal length of the sixth lens element is f6, and a maximum field of view of the photographing lens assembly is FOV, the following conditions are preferably satisfied:

$2.8 < TL / f < 5.5; 1.1 < ❘ f 2 / f 6 ❘ < 25.; and 105. degrees < FOV < 145. degrees .$

According to another aspect of the present disclosure, a photographing lens assembly includes six lens elements. The six lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.

Preferably, the object-side surface of the second lens element is convex in a paraxial region thereof. Preferably, the image-side surface of the sixth lens element has at least one inflection point.

When an axial distance between the object-side surface of the first lens element and an image surface is TL, a focal length of the photographing lens assembly is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the object-side surface of the second lens element is R3, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, a curvature radius of the object-side surface of the sixth lens element is R11, and a curvature radius of the image-side surface of the sixth lens element is R12, the following conditions are preferably satisfied:

$2. < TL / f < 5.4; (R 9 + R 10) / (R 9 - R 10) < - 1.6; 0.85 < (❘ f 1 ❘ + ❘ f 2 ❘) / ❘ f 5 ❘ < 10.5; (R 11 + R 12) / (R 11 - R 12) < - 0.55; 1.7 < (❘ f 2 ❘ + ❘ f 3 ❘) / (❘ f 1 ❘ + ❘ f 6 ❘); and - 0.15 < R 3 / R 1.$

Preferably, the object-side surface of the second lens element is convex in a paraxial region thereof. Preferably, the image-side surface of the sixth lens element has at least one inflection point.

When an axial distance between the object-side surface of the first lens element and an image surface is TL, a focal length of the photographing lens assembly is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the fifth lens element is f5, a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the object-side surface of the fifth lens element is R9, a curvature radius of the image-side surface of the fifth lens element is R10, an axial distance between the fourth lens element and the fifth lens element is T45, and an axial distance between the fifth lens element and the sixth lens element is T56, the following conditions are preferably satisfied:

$3. < TL / f < 5.4; (R 9 + R 10) / (R 9 - R 10) < - 1.9; 0.85 < (❘ f 1 ❘ + ❘ f 2 ❘) / ❘ f 5 ❘ < 10.5; 1.8 < ❘ f 2 / f 1 ❘ < 25.; 0 < T 56 / T 45 < 2.3; and - 0.1 < f / R 1.$

According to another aspect of the present disclosure, an image capturing unit includes one of the aforementioned photographing lens assemblies and an image sensor, wherein the image sensor is disposed on the image surface of the photographing lens assembly.

According to another aspect of the present disclosure, an electronic device includes the aforementioned image capturing unit.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure can be better understood by reading the following detailed description of the embodiments, with reference made to the accompanying drawings as follows:

FIG. 1 is a schematic view of an image capturing unit according to the 1st embodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 1st embodiment;

FIG. 3 is a schematic view of an image capturing unit according to the 2nd embodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 2nd embodiment;

FIG. 5 is a schematic view of an image capturing unit according to the 3rd embodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 3rd embodiment;

FIG. 7 is a schematic view of an image capturing unit according to the 4th embodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 4th embodiment;

FIG. 9 is a schematic view of an image capturing unit according to the 5th embodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 5th embodiment;

FIG. 11 is a schematic view of an image capturing unit according to the 6th embodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 6th embodiment;

FIG. 13 is a schematic view of an image capturing unit according to the 7th embodiment of the present disclosure;

FIG. 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 7th embodiment;

FIG. 15 is a schematic view of an image capturing unit according to the 8th embodiment of the present disclosure;

FIG. 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 8th embodiment;

FIG. 17 is a schematic view of an image capturing unit according to the 9th embodiment of the present disclosure;

FIG. 18 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 9th embodiment;

FIG. 19 is a perspective view of an image capturing unit according to the 10th embodiment of the present disclosure;

FIG. 20 is a perspective view of an electronic device according to the 11th embodiment of the present disclosure;

FIG. 21 is another perspective view of the electronic device in FIG. 20;

FIG. 22 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure;

FIG. 23 is another perspective view of the electronic device in FIG. 22;

FIG. 24 is a block diagram of the electronic device in FIG. 22;

FIG. 25 is a perspective view of an electronic device according to the 13th embodiment of the present disclosure;

FIG. 26 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure;

FIG. 27 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure;

FIG. 28 is a side view of the electronic device in FIG. 27;

FIG. 29 is a top view of the electronic device in FIG. 27;

FIG. 30 is a partial view of an inner side of an electronic device according to the 16th embodiment of the present disclosure;

FIG. 31 is a schematic view showing the image captured by an image capturing unit of the electronic device in FIG. 30 when processing its detection function;

FIG. 32 shows a schematic view of inflection points on lens surfaces and critical points on lens surfaces according to the 1st embodiment of the present disclosure;

FIG. 33 shows a schematic view of ET1, ET2, ET3, SAG1R2, SAG3R1, SAG5R2, SAG6R1, Y5R2 and Y6R1 according to the 1st embodiment of the present disclosure;

FIG. 34 shows a schematic view of a configuration of a light-folding element in a photographing lens assembly according to one embodiment of the present disclosure;

FIG. 35 shows a schematic view of another configuration of a light-folding element in a photographing lens assembly according to one embodiment of the present disclosure; and

FIG. 36 shows a schematic view of a configuration of two light-folding elements in a photographing lens assembly according to one embodiment of the present disclosure.

DETAILED DESCRIPTION

A photographing lens assembly includes six lens elements. The six lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.

The first lens element can have negative refractive power. Therefore, it is favorable for enlarging the field of view so as to obtain a relatively large range of image information. The object-side surface of the first lens element can be convex in a paraxial region thereof. Therefore, it is favorable for increasing the field of view and the image size. The image-side surface of the first lens element can be concave in a paraxial region thereof. Therefore, it is favorable for adjusting the lens shape of the first lens element and harmonizing the optical path so as to obtain a proper balance between the viewing angle and the image size.

The object-side surface of the second lens element is convex in a paraxial region thereof. Therefore, it is favorable for correcting aberrations such as spherical aberration and coma, thereby improving image quality.

The image-side surface of the fourth lens element can be convex in a paraxial region thereof. Therefore, it is favorable for converging light to prevent insufficient light convergence at the periphery due to insufficient light deflection.

The fifth lens element can have negative refractive power. Therefore, it is favorable for adjusting the optical path to enlarge the image surface, and it is also favorable for adjusting the refractive power distribution of the photographing lens assembly. The object-side surface of the fifth lens element can be concave in a paraxial region thereof. Therefore, it is favorable for adjusting the incident angle onto the fifth lens element so as to prevent light divergence. The image-side surface of the fifth lens element can be convex in a paraxial region thereof. Therefore, it is favorable for correcting astigmatism and eliminating distortion of the photographing lens assembly so as to improve image quality.

The sixth lens element can have positive refractive power. Therefore, it is favorable for converging light to reduce the back focal length. The object-side surface of the sixth lens element can be convex in a paraxial region thereof. Therefore, it is favorable for correcting field curvature. The image-side surface of the sixth lens element can be concave in a paraxial region thereof. Therefore, it is favorable for reducing the back focal length.

According to the present disclosure, the image-side surface of the sixth lens element has at least one inflection point. Therefore, it is favorable for adjusting the incident angle onto the image surface and controlling the angle of peripheral light so as to prevent vignetting at the periphery and eliminate distortion. Please refer to FIG. 32, which shows a schematic view of an inflection point P on the image-side surface of the sixth lens element E6 according to the 1st embodiment of the present disclosure. The abovementioned inflection point P on the image-side surface of the sixth lens element in FIG. 32 is exemplary. Each of lens surfaces in various embodiments of the present disclosure may also have one or more inflection points.

According to the present disclosure, the image-side surface of the sixth lens element can have at least one critical point in an off-axis region thereof. Therefore, it is favorable for increasing design flexibility at the periphery of the image-side surface of the sixth lens element, thereby balancing convergence quality of incident light from a large field of view.

Please refer to FIG. 32, which shows a schematic view of a critical point C in an off-axis region of the image-side surface of the sixth lens element E6 according to the 1st embodiment of the present disclosure. The abovementioned critical point C on the image-side surface of the sixth lens element in FIG. 32 is exemplary. Each of lens surfaces in various embodiments of the present disclosure may also have one or more critical points in an off-axis region thereof.

According to the present disclosure, the photographing lens assembly can further include an aperture stop that can be disposed at an object side of the fourth lens element. Therefore, it is favorable for adjusting the position of the aperture stop so as to obtain a proper balance between the viewing angle, the total track length and relative illuminance at the peripheral field of view. Moreover, the aperture stop can also be disposed at an object side of the third lens element. Moreover, the aperture stop can also be disposed between the second lens element and the third lens element. Therefore, it is favorable for effectively reducing the total track length of the photographing lens assembly while maintaining a wide viewing angle and a large image range.

According to the present disclosure, there can be an air gap in a paraxial region between each of all adjacent lens elements of the photographing lens assembly; that is, each of the first through sixth lens elements can be a single and non-cemented lens element. The manufacturing process of cemented lenses is more complex than the non-cemented lenses, particularly when an image-side surface of one lens element and an object-side surface of the following lens element need to have accurate curvatures to ensure both lenses being properly cemented. In addition, during the cementing process, those two lens elements might not be well cemented due to misalignment, which is not favorable for the image quality. Therefore, having an air gap in a paraxial region between each of all adjacent lens elements of the photographing lens assembly in the present disclosure is favorable for preventing the problems of the cemented lens elements and effectively reducing the limitation of optical design so as to easily harmonize the optical path and thus achieve target specifications.

According to the present disclosure, at least three lens elements of the photographing lens assembly can be made of plastic material. Therefore, it is favorable for reducing manufacturing costs and effectively increasing manufacturability of aspheric lens elements. Moreover, at least two lens elements of the photographing lens assembly can be made of the same plastic material. Therefore, it is favorable for adjusting material configuration and reducing manufacturing costs so as to increase manufacturability.

When an axial distance between the object-side surface of the first lens element and an image surface is TL, and a focal length of the photographing lens assembly is f, the following condition is satisfied: 2.00<TL/f<5.40. Therefore, it is favorable for obtaining a proper balance between the total track length and the field of view. Moreover, the following condition can also be satisfied: 2.80<TL/f<5.50. Moreover, the following condition can also be satisfied: 3.00<TL/f<5.40. Moreover, the following condition can also be satisfied: 3.20<TL/f<5.40. Moreover, the following condition can also be satisfied: 3.60≤TL/f≤5.10.

When a focal length of the second lens element is f2, and a focal length of the sixth lens element is f6, the following condition can be satisfied: 1.10<|f2/f6|<25.00. Therefore, it is favorable for adjusting the refractive power ratio of the second and sixth lens elements so as to correct spherical aberration and astigmatism. Moreover, the following condition can also be satisfied: 1.10<|f2/f6|<15.00. Moreover, the following condition can also be satisfied: 1.56≤|f2/f6|≤5.55.

When a maximum field of view of the photographing lens assembly is FOV, the following condition can be satisfied: 100.0 degrees<FOV<150.0 degrees. Therefore, it is favorable for standardizing the viewing angle specifications so as to prevent aberrations such as distortion caused by an overly large viewing angle. Moreover, the following condition can also be satisfied: 105.0 degrees<FOV<145.0 degrees. Moreover, the following condition can also be satisfied: 108.0 degrees<FOV<140.0 degrees. Moreover, the following condition can also be satisfied: 114.0 degrees≤FOV≤130.3 degrees.

When a curvature radius of the object-side surface of the fifth lens element is R9, and a curvature radius of the image-side surface of the fifth lens element is R10, the following condition can be satisfied: (R9+R10)/(R9−R10)<−1.60. Therefore, it is favorable for effectively balancing the curvature radii of the object-side surface and the image-side surface of the fifth lens element so as to adjust the emitting direction of light passing through the fifth lens element, thereby enlarging the image surface. Moreover, the following condition can also be satisfied: −10.00<(R9+R10)/(R9−R10)<−1.60. Moreover, the following condition can also be satisfied: (R9+R10)/(R9−R10)<−1.90. Moreover, the following condition can also be satisfied: −8.00<(R9+R10)/(R9−R10)<−1.90. Moreover, the following condition can also be satisfied: −5.25≤(R9+R10)/(R9−R10)≤−2.37.

When a focal length of the first lens element is f1, the focal length of the second lens element is f2, and a focal length of the fifth lens element is f5, the following condition can be satisfied: 0.85<(|f1|+|f2|)/|f5|<10.50. Therefore, it is favorable for adjusting the refractive powers of the first, second and fifth lens elements so as to balance the convergence and the divergence of incident light from the large field of view, thereby improving convergence quality at various fields of view. Moreover, the following condition can also be satisfied: 1.05<(|f1|+|f2|)/|f5|<8.00. Moreover, the following condition can also be satisfied: 2.01≤(|f1|+|f2|)/|f5|≤5.39.

When a curvature radius of the object-side surface of the sixth lens element is R11, and a curvature radius of the image-side surface of the sixth lens element is R12, the following condition can be satisfied: (R11+R12)/(R11−R12)<−0.55. Therefore, it is favorable for correcting field curvature and distortion to improve image quality by adjusting the curvature radii of the object-side surface and the image-side surface of the sixth lens element. Moreover, the following condition can also be satisfied: −10.00<(R11+R12)/(R11−R12)<−0.65. Moreover, the following condition can also be satisfied: −8.00<(R11+R12)/(R11−R12)<−0.65. Moreover, the following condition can also be satisfied: −4.23≤(R11+R12)/(R11−R12)≤−0.96.

When the focal length of the first lens element is f1, the focal length of the second lens element is f2, a focal length of the third lens element is f3, and the focal length of the sixth lens element is f6, the following condition can be satisfied: 1.70<(|f2|+|f3|)/(|f1|+|f6|). Therefore, it is favorable for adjusting the optical path to balance the refractive power distribution of the photographing lens assembly. Moreover, the following condition can also be satisfied: 1.80<(|f2|+|f3|)/(|f1|+|f6|)<40.00. Moreover, the following condition can also be satisfied: 2.07≤(|f2|+|f3|)/(|f1|+|f6|)≤21.47.

When a curvature radius of the object-side surface of the first lens element is R1, and a curvature radius of the object-side surface of the second lens element is R3, the following condition can be satisfied: −0.15<R3/R1. Therefore, it is favorable for collaborating the lens shapes of the first and second lens elements so as to correct aberrations. Moreover, the following condition can also be satisfied: −0.15<R3/R1<15.00. Moreover, the following condition can also be satisfied: −0.15<R3/R1<10.00. Moreover, the following condition can also be satisfied: −0.10<R3/R1<70.00. Moreover, the following condition can also be satisfied: −0.10<R3/R1<40.00. Moreover, the following condition can also be satisfied: 0.21≤R3/R1≤1.02.

When the focal length of the first lens element is f1, and the focal length of the second lens element is f2, the following condition can be satisfied: 1.80<|f2/f1|<25.00. Therefore, it is favorable for effectively balancing the refractive powers of the first and second lens elements, thereby increasing the photography viewing angle and correcting off-axis aberrations. Moreover, the following condition can also be satisfied: 1.80<|f2/f1|<17.00. Moreover, the following condition can also be satisfied: 2.19≤|f2/f1|≤5.83.

When an axial distance between the fourth lens element and the fifth lens element is T45, and an axial distance between the fifth lens element and the sixth lens element is T56, the following condition can be satisfied: 0<T56/T45<2.30. Therefore, it is favorable for collaborating with the lens shape design of the fifth lens element to adjust the position of the fifth lens element, thereby effectively preventing total internal reflection. Moreover, the following condition can also be satisfied: 0<T56/T45<2.00. Moreover, the following condition can also be satisfied: 0<T56/T45<1.50. Moreover, the following condition can also be satisfied: 0.13≤T56/T45≤0.87.

When the focal length of the photographing lens assembly is f, and the curvature radius of the object-side surface of the first lens element is R1, the following condition can be satisfied: −0.10<f/R1. Therefore, it is favorable for controlling the degree of the lens curvature of the object-side surface of the first lens element, thereby assisting in receiving light from the large field of view. Moreover, the following condition can also be satisfied: −0.10<f/R1<2.50. Moreover, the following condition can also be satisfied: −0.10<f/R1<1.50. Moreover, the following condition can also be satisfied: 0.14≤f/R1≤0.81.

When an f-number of the photographing lens assembly is Fno, the following condition can be satisfied: 1.50<Fno<2.70. Therefore, it is favorable for obtaining a proper balance between the illuminance and the depth of view.

When the axial distance between the object-side surface of the first lens element and the image surface is TL, and a maximum image height of the photographing lens assembly (which can be half of a diagonal length of an effective photosensitive area of the image sensor) is ImgH, the following condition can be satisfied: TL/ImgH<3.30. Therefore, it is favorable for obtaining a proper balance between the total track length and the image surface size. Moreover, the following condition can also be satisfied: 1.10<TL/ImgH<2.90. Moreover, the following condition can also be satisfied: 1.85<TL/ImgH<2.90.

When an axial distance between the third lens element and the fourth lens element is T34, and the axial distance between the fifth lens element and the sixth lens element is T56, the following condition can be satisfied: 0<T56/T34<5.50. Therefore, it is favorable for reducing the total track of the photographing lens assembly while preventing divergence of peripheral light. Moreover, the following condition can also be satisfied: 0<T56/T34<3.50.

When the curvature radius of the object-side surface of the first lens element is R1, and a curvature radius of the image-side surface of the first lens element is R2, the following condition can be satisfied: 0<|R1/R2|<25.0. Therefore, it is favorable for adjusting the lens shape of the first lens element, thereby effectively converging light from the large field of view and correcting spherical aberration. Moreover, the following condition can also be satisfied: 0<|R1/R2|<18.0. Moreover, the following condition can also be satisfied: 0<|R1/R2|<15.0.

When an axial distance between the second lens element and the third lens element is T23, and a central thickness of the second lens element is CT2, the following condition can be satisfied: 0<T23/CT2<1.10. Therefore, it is favorable for ensuring sufficient thickness of the second lens element to deflect light from the large field of view. Moreover, the following condition can also be satisfied: 0<T23/CT2<0.90.

When an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, and an Abbe number of the fifth lens element is V5, the following condition can be satisfied: 0.30<(V2+V5)/V1<1.30. Therefore, a proper selection of materials of the first, second and fifth lens elements is favorable for correcting chromatic aberration of the photographing lens assembly so as to improve image quality.

When an axial distance between the image-side surface of the sixth lens element and the image surface is BL, and a central thickness of the fifth lens element is CT5, the following condition can be satisfied: 0.5<BL/CT5<8.00. Therefore, it is favorable for effectively reducing the back focal length to prevent an overly long total track length of the optical lens. Moreover, the following condition can also be satisfied: 1.0<BL/CT5<6.50. Moreover, the following condition can also be satisfied: 1.2<BL/CT5<6.00.

When a central thickness of the third lens element is CT3, and a distance in parallel with an optical axis between a maximum effective radius position of the object-side surface of the third lens element and a maximum effective radius position of the image-side surface of the third lens element is ET3, the following condition can be satisfied: 0.80<CT3/ET3<2.00. Therefore, it is favorable for adjusting the lens shape of the third lens element, thereby balancing the size distribution at the object end and the image end of the photographing lens assembly. Moreover, the following condition can also be satisfied: 0.90<CT3/ET3<1.80. Please refer to FIG. 33, which shows a schematic view of ET3 according to the 1st embodiment of the present disclosure.

When a displacement in parallel with the optical axis from an axial vertex on the object-side surface of the third lens element to a maximum effective radius position on the object-side surface of the third lens element is SAG3R1, and a displacement in parallel with the optical axis from an axial vertex on the image-side surface of the fifth lens element to a maximum effective radius position on the image-side surface of the fifth lens element is SAG5R2, the following condition can be satisfied: −1.00<SAG3R1/SAG5R2<0.50. Therefore, it is favorable for controlling the degree of the lens curvature at the peripheries of the object-side surface of the third lens element and the image-surface of the fifth lens element, thereby collaborating them to guide the traveling direction of light. Moreover, the following condition can also be satisfied: −0.65<SAG3R1/SAG5R2<0.20. Please refer to FIG. 33, which shows a schematic view of SAG3R1 and SAG5R2 according to the 1st embodiment of the present disclosure. When the direction from the axial vertex of one surface to the maximum effective radius position of the same surface is facing towards the image side of the photographing lens assembly, the value of displacement is positive; when the direction from the axial vertex of the surface to the maximum effective radius position of the same surface is facing towards the object side of the photographing lens assembly, the value of displacement is negative.

When a central thickness of the first lens element is CT1, and the central thickness of the second lens element is CT2, the following condition can be satisfied: 0<CT1/CT2<1.20. Therefore, it is favorable for balancing the central thickness ratio of the first and second lens elements, thereby reducing manufacturing tolerance and increasing yield rate. Moreover, the following condition can also be satisfied: 0.20<CT1/CT2<1.00.

When the axial distance between the second lens element and the third lens element is T23, and the axial distance between the fifth lens element and the sixth lens element is T56, the following condition can be satisfied: 0<T56/T23<5.50. Therefore, it is favorable for reducing the size of the photographing lens assembly, thereby maintaining optimal space arrangement. Moreover, the following condition can also be satisfied: 0<T56/T23<3.50.

When the axial distance between the object-side surface of the first lens element and the image surface is TL, the f-number of the photographing lens assembly is Fno, and the focal length of the photographing lens assembly is f, the following condition can be satisfied: 1.30<TL×Fno/f<3.00. Therefore, it is favorable for obtaining a proper balance between the total track length, the viewing angle and the illuminance, thereby satisfying various applications. Moreover, the following condition can also be satisfied: 1.30<TL×Fno/f<2.80. Moreover, the following condition can also be satisfied: 1.30<TL×Fno/f<2.60.

When a maximum effective radius of the image-side surface of the fifth lens element is Y5R2, and a maximum effective radius of the object-side surface of the sixth lens element is Y6R1, the following condition can be satisfied: 1.05<Y6R1/Y5R2<1.80. Therefore, it is favorable for enlarging the image surface by adjusting the light boundaries ranging from the image-side surface of the fifth lens element to the object-side surface of the sixth lens element. Please refer to FIG. 33, which shows a schematic view of Y5R2 and Y6R1 according to the 1 st embodiment of the present disclosure.

When a displacement in parallel with the optical axis from an axial vertex on the object-side surface of the sixth lens element to a maximum effective radius position on the object-side surface of the sixth lens element is SAG6R1, and a central thickness of the sixth lens element is CT6, the following condition can be satisfied: 0<SAG6R1/CT6<0.70. Therefore, it is favorable for adjusting the lens shape variation of the sixth lens element so as to correct astigmatism and distortion, thereby improving image quality. Please refer to FIG. 33, which shows a schematic view of SAG6R1 according to the 1st embodiment of the present disclosure. When the direction from the axial vertex of one surface to the maximum effective radius position of the same surface is facing towards the image side of the photographing lens assembly, the value of displacement is positive; when the direction from the axial vertex of the surface to the maximum effective radius position of the same surface is facing towards the object side of the photographing lens assembly, the value of displacement is negative.

When a maximum value of an absolute value of a distortion aberration on the image surface at various fields of view is |DIST|max, the following condition can be satisfied: |DIST|max<50%. Therefore, it is favorable for effectively managing image quality to reduce problems such as image deformation and image distortion. Moreover, the following condition can also be satisfied: |DIST|max<30%. Moreover, the following condition can also be satisfied: 3%<|DIST|max<25%.

When an axial distance between the first lens element and the second lens element is T12, and the axial distance between the second lens element and the third lens element is T23, the following condition can be satisfied: 1.10<T12/T23. Therefore, it is favorable for adjusting the lens interval arrangement of the photographing lens assembly, such that the lens elements close to the object end are arranged with relatively large intervals, thereby balancing light from the large field of view onto the image surface. Moreover, the following condition can also be satisfied: 1.10<T12/T23<15.00.

When the central thickness of the first lens element is CT1, and the central thickness of the third lens element is CT3, the following condition can be satisfied: 1.05<CT3/CT1. Therefore, it is favorable for controlling the central thickness ratio of the first and third lens elements, thereby reducing manufacturing sensitivity. Moreover, the following condition can also be satisfied: 1.05<CT3/CT1<4.00.

When the focal length of the second lens element is f2, and the focal length of the fifth lens element is f5, the following condition can be satisfied: 0.90<|f2/f5|. Therefore, it is favorable for adjusting the refractive powers of the second and fifth lens elements, thereby enhancing the balance of the photographing lens assembly while reducing sensitivity to eccentricity. Moreover, the following condition can also be satisfied: 1.20<|f2/f5|<15.00. Moreover, the following condition can also be satisfied: 1.20<|f2/f5|<5.00.

When a displacement in parallel with the optical axis from an axial vertex on the image-side surface of the first lens element to a maximum effective radius position on the image-side surface of the first lens element is SAG1R2, and the central thickness of the first lens element is CT1, the following condition can be satisfied: 1.10<SAG1R2/CT1<2.50. Therefore, it is favorable for ensuring sufficient degree of lens curvature at the periphery of the image-side surface of the first lens element, thereby increasing the field of view. Please refer to FIG. 33, which shows a schematic view of SAG1R2 according to the 1st embodiment of the present disclosure. When the direction from the axial vertex of one surface to the maximum effective radius position of the same surface is facing towards the image side of the photographing lens assembly, the value of displacement is positive; when the direction from the axial vertex of the surface to the maximum effective radius position of the same surface is facing towards the object side of the photographing lens assembly, the value of displacement is negative.

When a distance in parallel with the optical axis between a maximum effective radius position of the object-side surface of the first lens element and a maximum effective radius position of the image-side surface of the first lens element is ET1, and a distance in parallel with the optical axis between a maximum effective radius position of the object-side surface of the second lens element and a maximum effective radius position of the image-side surface of the second lens element is ET2, the following condition can be satisfied: 0.3<ET2/ET1<1.4. Therefore, it is favorable for adjusting the margin thickness of the first and second lens elements so as to assist in deflecting light from the large field of view. Please refer to FIG. 33, which shows a schematic view of ET1 and ET2 according to the 1st embodiment of the present disclosure.

According to the present disclosure, the aforementioned features and conditions can be utilized in numerous combinations so as to achieve corresponding effects.

According to the present disclosure, the lens elements of the photographing lens assembly can be made of either glass or plastic material. When the lens elements are made of glass material, the refractive power distribution of the photographing lens assembly may be more flexible, and the influence on imaging caused by external environment temperature change may be reduced. The glass lens element can either be made by grinding or molding. When the lens elements are made of plastic material, the manufacturing costs can be effectively reduced. Furthermore, surfaces of each lens element can be arranged to be spherical or aspheric. Spherical lens elements are simple in manufacture. Aspheric lens element design allows more control variables for eliminating aberrations thereof and reducing the required number of lens elements, and the total track length of the photographing lens assembly can therefore be effectively shortened. Additionally, the aspheric surfaces may be formed by plastic injection molding or glass molding.

According to the present disclosure, when a lens surface is aspheric, it means that the lens surface has an aspheric shape throughout its optically effective area, or a portion(s) thereof.

According to the present disclosure, one or more of the lens elements' material may optionally include an additive which generates light absorption and interference effects and alters the lens elements' transmittance in a specific range of wavelength for a reduction in unwanted stray light or color deviation. For example, the additive may optionally filter out light in the wavelength range of 600 nm to 800 nm to reduce excessive red light and/or near infrared light; or may optionally filter out light in the wavelength range of 350 nm to 450 nm to reduce excessive blue light and/or near ultraviolet light from interfering the final image. The additive may be homogeneously mixed with a plastic material to be used in manufacturing a mixed-material lens element by injection molding. Moreover, the additive may be coated on the lens surfaces to provide the abovementioned effects.

According to the present disclosure, each of an object-side surface and an image-side surface has a paraxial region and an off-axis region. The paraxial region refers to the region of the surface where light rays travel close to the optical axis, and the off-axis region refers to the region of the surface away from the paraxial region. Particularly, unless otherwise stated, when the lens element has a convex surface, it indicates that the surface is convex in the paraxial region thereof; when the lens element has a concave surface, it indicates that the surface is concave in the paraxial region thereof. Moreover, when a region of refractive power or focus of a lens element is not defined, it indicates that the region of refractive power or focus of the lens element is in the paraxial region thereof.

According to the present disclosure, an inflection point is a point on the surface of the lens element at which the surface changes from concave to convex, or vice versa. A critical point is a non-axial point of the lens surface where its tangent is perpendicular to the optical axis.

According to the present disclosure, the image surface of the photographing lens assembly, based on the corresponding image sensor, can be flat or curved, especially a curved surface being concave facing towards the object side of the photographing lens assembly.

According to the present disclosure, an image correction unit, such as a field flattener, can be optionally disposed between the lens element closest to the image side of the photographing lens assembly along the optical path and the image surface for correction of aberrations such as field curvature. The optical properties of the image correction unit, such as curvature, thickness, index of refraction, position and surface shape (convex or concave surface with spherical, aspheric, diffractive or Fresnel types), can be adjusted according to the design of the image capturing unit. In general, a preferable image correction unit is, for example, a thin transparent element having a concave object-side surface and a planar image-side surface, and the thin transparent element is disposed near the image surface.

According to the present disclosure, at least one light-folding element, such as a prism or a mirror which can have a surface being planar, spherical, aspheric or in free-form, can be optionally disposed between an imaged object and the image surface on the imaging optical path, such that the photographing lens assembly can be more flexible in space arrangement, and therefore the dimensions of an electronic device is not restricted by the total track length of the photographing lens assembly. Specifically, please refer to FIG. 34 and FIG. 35. FIG. 34 shows a schematic view of a configuration of a light-folding element in a photographing lens assembly according to one embodiment of the present disclosure, and FIG. 35 shows a schematic view of another configuration of a light-folding element in a photographing lens assembly according to one embodiment of the present disclosure. In FIG. 34 and FIG. 35, the photographing lens assembly can have, in order from an imaged object (not shown in the figures) to an image surface IMG along an optical path, a first optical axis OA1, a light-folding element LF and a second optical axis OA2. The light-folding element LF can be disposed between the imaged object and a lens group LG of the photographing lens assembly as shown in FIG. 34 or disposed between a lens group LG of the photographing lens assembly and the image surface IMG as shown in FIG. 35. Furthermore, please refer to FIG. 36, which shows a schematic view of a configuration of two light-folding elements in a photographing lens assembly according to one embodiment of the present disclosure. In FIG. 36, the photographing lens assembly can have, in order from an imaged object (not shown in the figure) to an image surface IMG along an optical path, a first optical axis OA1, a first light-folding element LF1, a second optical axis OA2, a second light-folding element LF2 and a third optical axis OA3. The first light-folding element LF1 is disposed between the imaged object and a lens group LG of the photographing lens assembly, the second light-folding element LF2 is disposed between the lens group LG of the photographing lens assembly and the image surface IMG, and the travelling direction of light on the first optical axis OA1 can be the same direction as the travelling direction of light on the third optical axis OA3 as shown in FIG. 36. The photographing lens assembly can be optionally provided with three or more light-folding elements, and the present disclosure is not limited to the type, amount and position of the light-folding elements of the embodiments disclosed in the aforementioned figures.

According to the present disclosure, the photographing lens assembly can include at least one stop, such as an aperture stop, a glare stop or a field stop. Said glare stop or said field stop is set for eliminating the stray light and thereby improving image quality thereof. According to the present disclosure, an aperture stop can be configured as a front stop or a middle stop. A front stop disposed between an imaged object and the first lens element can provide a longer distance between an exit pupil of the photographing lens assembly and the image surface to produce a telecentric effect, and thereby improves the image-sensing efficiency of an image sensor (for example, CCD or CMOS). A middle stop disposed between the first lens element and the image surface is favorable for enlarging the viewing angle of the photographing lens assembly and thereby provides a wider field of view for the same.

According to the present disclosure, the photographing lens assembly can include an aperture control unit. The aperture control unit may be a mechanical component or a light modulator, which can control the size and shape of the aperture through electricity or electrical signals. The mechanical component can include a movable member, such as a blade assembly or a light shielding sheet. The light modulator can include a shielding element, such as a filter, an electrochromic material or a liquid-crystal layer. The aperture control unit controls the amount of incident light or exposure time to enhance the capability of image quality adjustment. In addition, the aperture control unit can be the aperture stop of the present disclosure, which changes the f-number to obtain different image effects, such as the depth of field or lens speed.

According to the present disclosure, the photographing lens assembly can include one or more optical elements for limiting the form of light passing through the photographing lens assembly. Each optical element can be, but not limited to, a filter, a polarizer, etc., and each optical element can be, but not limited to, a single-piece element, a composite component, a thin film, etc. The optical element can be located at the object side or the image side of the photographing lens assembly or between any two adjacent lens elements so as to allow light in a specific form to pass through, thereby meeting application requirements.

According to the present disclosure, the photographing lens assembly can include at least one optical lens element, an optical element, or a carrier, which has at least one surface with a low reflection layer. The low reflection layer can effectively reduce stray light generated due to light reflection at the interface. The low reflection layer can be disposed in an optical non-effective area of an object-side surface or an image-side surface of the said optical lens element, or a connection surface between the object-side surface and the image-side surface. The said optical element can be a light-blocking element, an annular spacer, a barrel element, a cover glass, a blue glass, a filter, a color filter, an optical path folding element, a prism, a mirror, etc. The said carrier can be a base for supporting a lens assembly, a micro lens disposed on an image sensor, a substrate surrounding the image sensor, a glass plate for protecting the image sensor, etc.

According to the present disclosure, the object side and the image side are defined in accordance with the direction of the optical axis, and the axial optical data are calculated along the optical axis. Furthermore, if the optical axis is folded by a light-folding element, the axial optical data are also calculated along the folded optical axis.

According to the above description of the present disclosure, the following specific embodiments are provided for further explanation.

1ST EMBODIMENT

FIG. 1 is a schematic view of an image capturing unit according to the 1st embodiment of the present disclosure. FIG. 2 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 1st embodiment. In FIG. 1, the image capturing unit 1 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a stop S1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7, a filter E8 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The second lens element E2 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface being both aspheric.

The third lens element E3 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The third lens element E3 is made of plastic material and has the object-side surface and the image-side surface being both aspheric.

The fourth lens element E4 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has one inflection point.

The fifth lens element E5 with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point.

The sixth lens element E6 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The sixth lens element E6 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the sixth lens element E6 has two inflection points. The image-side surface of the sixth lens element E6 has one inflection point. The object-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The filter E8 is made of glass material and located between the filter E7 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The equation of the aspheric surface profiles of the aforementioned lens elements of the 1st embodiment is expressed as follows:

$X (Y) = (Y^{2} / R) / (1 + sqrt (1 - (1 + k) \times {(Y / R)}^{2})) + \sum_{i} (Ai) \times (Y^{i}),$

where,

- X is the displacement in parallel with an optical axis from an axial vertex on the aspheric surface to a point at a distance of Y from the optical axis on the aspheric surface;
- Y is the vertical distance from the point on the aspheric surface to the optical axis;
- R is the curvature radius;
- k is the conic coefficient; and
- Ai is the i-th aspheric coefficient, and in the embodiments, i may be, but is not limited to, 4, 6, 8, 10, 12, 14 and 16.

In the photographing lens assembly of the image capturing unit 1 according to the 1st embodiment, when a focal length of the photographing lens assembly is f, an f-number of the photographing lens assembly is Fno, and half of a maximum field of view of the photographing lens assembly is HFOV, these parameters have the following values: f=1.83 millimeters (mm), Fno=2.15, HFOV=57.0 degrees (deg.).

When the maximum field of view of the photographing lens assembly is FOV, the following condition is satisfied: FOV=114.0 degrees.

When an axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL, and the focal length of the photographing lens assembly is f, the following condition is satisfied: TL/f=4.43.

When the axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL, and a maximum image height of the photographing lens assembly is ImgH, the following condition is satisfied: TL/ImgH=2.70.

When the axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL, the f-number of the photographing lens assembly is Fno, and the focal length of the photographing lens assembly is f, the following condition is satisfied: TL×Fno/f=2.06.

When a focal length of the first lens element E1 is f1, and a focal length of the second lens element E2 is f2, the following condition is satisfied: |f2/f1|=2.47.

When the focal length of the second lens element E2 is f2, and a focal length of the fifth lens element E5 is f5, the following condition is satisfied: |f2/f5|=2.28.

When the focal length of the second lens element E2 is f2, and a focal length of the sixth lens element E6 is f6, the following condition is satisfied: |f2/f6|=2.04.

When the focal length of the first lens element E1 is f1, the focal length of the second lens element E2 is f2, and the focal length of the fifth lens element E5 is f5, the following condition is satisfied: (|f1|+|f2|)/|f5|=3.21.

When the focal length of the first lens element E1 is f1, the focal length of the second lens element E2 is f2, a focal length of the third lens element E3 is f3, and the focal length of the sixth lens element E6 is f6, the following condition is satisfied: (|f2|+|f3|)/(|f1|+|f6|)=2.98.

When the focal length of the photographing lens assembly is f, and a curvature radius of the object-side surface of the first lens element E1 is R1, the following condition is satisfied: f/R1=0.58.

When the curvature radius of the object-side surface of the first lens element E1 is R1, and a curvature radius of the image-side surface of the first lens element E1 is R2, the following condition is satisfied: |R1/R2|=3.71.

When the curvature radius of the object-side surface of the first lens element E1 is R1, and a curvature radius of the object-side surface of the second lens element E2 is R3, the following condition is satisfied: R3/R1=0.58.

When a curvature radius of the object-side surface of the fifth lens element E5 is R9, and a curvature radius of the image-side surface of the fifth lens element E5 is R10, the following condition is satisfied: (R9+R10)/(R9−R10)=−2.56.

When a curvature radius of the object-side surface of the sixth lens element E6 is R11, and a curvature radius of the image-side surface of the sixth lens element E6 is R12, the following condition is satisfied: (R11+R12)/(R11−R12)=−1.67.

When a central thickness of the first lens element E1 is CT1, and a central thickness of the second lens element E2 is CT2, the following condition is satisfied: CT1/CT2=0.51.

When the central thickness of the first lens element E1 is CT1, and a central thickness of the third lens element E3 is CT3, the following condition is satisfied: CT3/CT1=1.61.

When an axial distance between the second lens element E2 and the third lens element E3 is T23, and the central thickness of the second lens element E2 is CT2, the following condition is satisfied: T23/CT2=0.12. In this embodiment, an axial distance between two adjacent lens elements is a distance in a paraxial region between two adjacent lens surfaces of the two adjacent lens elements.

When an axial distance between the first lens element E1 and the second lens element E2 is T12, and the axial distance between the second lens element E2 and the third lens element E3 is T23, the following condition is satisfied: T12/T23=6.24.

When the axial distance between the second lens element E2 and the third lens element E3 is T23, and an axial distance between the fifth lens element E5 and the sixth lens element E6 is T56, the following condition is satisfied: T56/T23=0.22.

When an axial distance between the third lens element E3 and the fourth lens element E4 is T34, and the axial distance between the fifth lens element E5 and the sixth lens element E6 is T56, the following condition is satisfied: T56/T34=0.41.

When an axial distance between the fourth lens element E4 and the fifth lens element E5 is T45, and the axial distance between the fifth lens element E5 and the sixth lens element E6 is T56, the following condition is satisfied: T56/T45=0.13.

When an axial distance between the image-side surface of the sixth lens element E6 and the image surface IMG is BL, and a central thickness of the fifth lens element E5 is CT5, the following condition is satisfied: BL/CT5=3.52.

When a maximum value among central thicknesses of all lens elements of the photographing lens assembly is CTmax, and a maximum value among axial distances between all adjacent lens elements of the photographing lens assembly is ATmax, the following condition is satisfied: CTmax/ATmax=1.46. In this embodiment, a central thickness of the sixth lens element E6 is larger than each of central thicknesses of the other lens elements of the photographing lens assembly, and CTmax is equal to the central thickness of the sixth lens element E6. In this embodiment, an axial distance between the first lens element E1 and the second lens element E2 is larger than each of axial distances between the other adjacent lens elements of the photographing lens assembly, and ATmax is equal to the axial distance between the first lens element E1 and the second lens element E2.

When an Abbe number of the first lens element E1 is V1, an Abbe number of the second lens element E2 is V2, and an Abbe number of the fifth lens element E5 is V5, the following condition is satisfied: (V2+V5)/V1=0.82.

When a displacement in parallel with the optical axis from an axial vertex on the image-side surface of the first lens element E1 to a maximum effective radius position on the image-side surface of the first lens element E1 is SAG1R2, and the central thickness of the first lens element E1 is CT1, the following condition is satisfied: SAG1R2/CT1=1.59.

When the central thickness of the third lens element E3 is CT3, and a distance in parallel with the optical axis between a maximum effective radius position of the object-side surface of the third lens element E3 and a maximum effective radius position of the image-side surface of the third lens element E3 is ET3, the following condition is satisfied: CT3/ET3=1.19.

When a displacement in parallel with the optical axis from an axial vertex on the object-side surface of the sixth lens element E6 to a maximum effective radius position on the object-side surface of the sixth lens element E6 is SAG6R1, and a central thickness of the sixth lens element E6 is CT6, the following condition is satisfied: SAG6R1/CT6=0.16.

When a distance in parallel with the optical axis between a maximum effective radius position of the object-side surface of the first lens element E1 and a maximum effective radius position of the image-side surface of the first lens element E1 is ET1, and a distance in parallel with the optical axis between a maximum effective radius position of the object-side surface of the second lens element E2 and a maximum effective radius position of the image-side surface of the second lens element E2 is ET2, the following condition is satisfied: ET2/ET1=0.9.

When a displacement in parallel with the optical axis from an axial vertex on the object-side surface of the third lens element E3 to a maximum effective radius position on the object-side surface of the third lens element E3 is SAG3R1, and a displacement in parallel with the optical axis from an axial vertex on the image-side surface of the fifth lens element E5 to a maximum effective radius position on the image-side surface of the fifth lens element E5 is SAG5R2, the following condition is satisfied: SAG3R1/SAG5R2=−0.20.

When a maximum effective radius of the image-side surface of the fifth lens element E5 is Y5R2, and a maximum effective radius of the object-side surface of the sixth lens element E6 is Y6R1, the following condition is satisfied: Y6R1/Y5R2=1.26.

When a maximum value of an absolute value of a distortion aberration on the image surface IMG at various fields of view is |DIST|max, the following condition is satisfied:

$❘ DIST ❘ \max = 10 % .$

The detailed optical data of the 1st embodiment are shown in Table 1A and the aspheric surface data are shown in Table 1B below.

TABLE 1A

1st Embodiment

f = 1.83 mm, Fno = 2.15, HFOV = 57.0 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
3.1383
(ASP)
0.586
Plastic
1.544
56.0
−2.34

2

0.8455
(ASP)
1.149

3
Stop
Plano
−0.301

4
Lens 2
1.8093
(ASP)
1.148
Plastic
1.614
25.6
5.76

5

2.8099
(ASP)
0.115

6
Ape. Stop
Plano
0.021

7
Lens 3
5.3370
(ASP)
0.944
Plastic
1.544
56.0
9.64

8

−285.2223
(ASP)
0.080

9
Stop
Plano
−0.007

10
Lens 4
2.0829
(ASP)
0.784
Plastic
1.544
56.0
1.95

11

−1.8665
(ASP)
0.238

12
Lens 5
−0.7616
(ASP)
0.459
Plastic
1.660
20.4
−2.53

13

−1.7386
(ASP)
0.030

14
Lens 6
1.2824
(ASP)
1.239
Plastic
1.544
56.0
2.83

15

5.1054
(ASP)
0.500

16
Filter
Plano
0.300
Glass
1.517
64.2
—

17

Plano
0.300

18
Filter
Plano
0.400
Glass
1.517
64.2
—

19

Plano
0.114

20
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 3) is 1.146 mm.

An effective radius of the stop S2 (Surface 9) is 0.870 mm.

TABLE 1B

Aspheric Coefficients

Surface #
1
2
4
5

k=
−3.5851100E+00
−8.4997000E−01
−1.8385100E+00
−3.4041600E+01

A4=
−2.9816205E−02
−9.6888230E−02
1.9416733E−02
3.6316436E−01

A6=
8.6477456E−03
−4.3844654E−03
−1.0706548E−02
−3.6298450E−01

A8=
−9.9255836E−04
−5.7127446E−03
−1.8164450E−03
1.9452745E+00

A10=
4.6499678E−05
1.4484067E−02
2.3229559E−02
−3.9413576E+00

A12=
—
−3.2155432E−03
−1.1410745E−02
3.9889209E+00

Surface #
7
8
10
11

k=
−5.0504500E+00
5.0000000E+00
−2.4653800E+01
−5.6191300E+00

A4=
1.0507580E−01
−5.8353401E−01
−2.2914054E−01
−4.2360922E−02

A6=
3.1982228E−01
1.4999205E+00
5.2994486E−01
−1.6032408E−01

A8=
−1.5712980E+00
−2.9533380E+00
−7.0883458E−01
−3.1737756E−01

A10=
7.0877033E+00
3.8907612E+00
6.1265471E−01
1.2567520E+00

A12=
−1.4085698E+01
−3.0087190E+00
−2.9743805E−01
−1.5628421E+00

A14=
1.0440707E+01
1.0830170E+00
6.7519218E−02
8.9763004E−01

A16=
—
—
—
−1.9369902E−01

Surface #
12
13
14
15

k=
−7.9571400E−01
2.1916500E−01
−1.0694000E+00
−7.7459800E+01

A4=
1.0743369E+00
4.1719638E−01
−2.5264623E−01
3.5311336E−02

A6=
−2.0667231E+00
−6.0783240E−01
1.8931389E−01
−2.9160004E−02

A8=
2.4216063E+00
6.8077418E−01
−1.3231218E−01
8.1941144E−03

A10=
−1.4381449E+00
−5.1030247E−01
6.4263368E−02
−1.0908332E−03

A12=
−7.6921067E−02
2.3372337E−01
−2.0609108E−02
4.8790996E−05

A14=
5.5120803E−01
−5.8080774E−02
3.7830314E−03
8.4135287E−07

A16=
−1.9024389E−01
6.2253405E−03
−2.8915237E−04
−1.3879407E−08

In Table 1A, the curvature radius, the thickness and the focal length are shown in millimeters (mm). Surface numbers 0-20 represent the surfaces sequentially arranged from the object side to the image side along the optical axis. In Table 1B, k represents the conic coefficient of the equation of the aspheric surface profiles. A4-A16 represent the aspheric coefficients ranging from the 4th order to the 16th order. The tables presented below for each embodiment are the corresponding schematic parameter and aberration curves, and the definitions of the tables are the same as Table 1A and Table 1B of the 1st embodiment. Therefore, an explanation in this regard will not be provided again.

2ND EMBODIMENT

FIG. 3 is a schematic view of an image capturing unit according to the 2nd embodiment of the present disclosure. FIG. 4 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 2nd embodiment. In FIG. 3, the image capturing unit 2 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a stop S1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7, a filter E8 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The first lens element E1 with negative refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The first lens element E1 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the first lens element E1 has two inflection points. The image-side surface of the first lens element E1 has three inflection points.

The third lens element E3 with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The third lens element E3 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the third lens element E3 has one inflection point. The object-side surface of the third lens element E3 has one critical point in an off-axis region thereof.

The fourth lens element E4 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fourth lens element E4 is made of glass material and has the object-side surface and the image-side surface being both aspheric. The image-side surface of the fourth lens element E4 has one inflection point.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The filter E8 is made of glass material and located between the filter E7 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The detailed optical data of the 2nd embodiment are shown in Table 2A and the aspheric surface data are shown in Table 2B below.

TABLE 2A

2nd Embodiment

f = 1.62 mm, Fno = 2.30, HFOV = 62.0 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
3.3025
(ASP)
0.345
Plastic
1.511
56.8
−2.52

2

0.8933
(ASP)
0.872

3
Stop
Plano
−0.175

4
Lens 2
2.3818
(ASP)
0.992
Plastic
1.642
22.5
5.51

5

6.1128
(ASP)
0.063

6
Ape. Stop
Plano
0.042

7
Lens 3
−35.5661
(ASP)
0.866
Plastic
1.511
56.8
−108.54

8

−100.0000
(ASP)
0.040

9
Stop
Plano
0.031

10
Lens 4
1.8491
(ASP)
1.146
Glass
1.518
58.9
2.22

11

−2.3871
(ASP)
0.065

12
Lens 5
−0.9132
(ASP)
0.446
Plastic
1.697
16.3
−3.99

13

−1.6332
(ASP)
0.030

14
Lens 6
1.2013
(ASP)
1.331
Plastic
1.544
56.0
2.79

15

3.4946
(ASP)
0.300

16
Filter
Plano
0.300
Glass
1.517
64.2
—

17

Plano
0.300

18
Filter
Plano
0.300
Glass
1.517
64.2
—

19

Plano
0.238

20
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 3) is 1.119 mm.

An effective radius of the stop S2 (Surface 9) is 0.894 mm.

TABLE 2B

Aspheric Coefficients

Surface #
1
2
4
5

k=
−3.0715800E+00
−9.6211500E−01
−5.3080100E+00
−7.4236300E+01

A4=
−1.8779868E−02
−5.6504184E−02
3.5583707E−02
1.9211748E−01

A6=
−2.1803455E−03
3.9294021E−02
−1.5780094E−02
1.4288712E−01

A8=
1.8669603E−03
−1.7036441E−01
−6.5709793E−02
5.9414720E−01

A10=
−2.0627705E−04
1.2560102E−01
9.9696507E−02
−2.5720847E+00

A12=
—
−2.7320381E−02
−3.6264714E−02
9.7058084E+00

Surface #
7
8
10
11

k=
−8.7891100E+01
5.0000000E+00
−3.2231400E+01
−4.8394300E+00

A4=
1.8724460E−01
−8.4321355E−01
−2.8023548E−01
−1.4133905E−01

A6=
−8.4419042E−01
2.6857155E+00
8.2079439E−01
−2.5223899E−01

A8=
8.4882473E+00
−5.5110044E+00
−1.1055832E+00
8.4916884E−01

A10=
−3.5350149E+01
6.7511053E+00
7.8203664E−01
−1.0580988E+00

A12=
7.8946831E+01
−4.7023035E+00
−2.7219436E−01
6.8365712E−01

A14=
−6.9065083E+01
1.5264981E+00
3.7974274E−02
−2.3222745E−01

A16=
—
—
—
3.4566759E−02

Surface #
12
13
14
15

k=
−8.2273000E−01
−4.4342200E−01
−9.8661100E−01
−2.4859900E+00

A4=
8.5734157E−01
4.0132240E−01
−2.0001261E−01
−4.7216252E−02

A6=
−1.4418577E+00
−3.5341560E−01
8.0573244E−02
1.6903702E−02

A8=
1.9591056E+00
2.6081583E−01
−1.8947320E−02
−2.7894334E−03

A10=
−1.8232369E+00
−1.7145155E−01
−3.2169422E−03
−1.6871224E−04

A12=
9.8305072E−01
7.6347011E−02
2.5709781E−03
1.2503161E−04

A14=
−2.6412096E−01
−1.7755555E−02
−4.5243008E−04
−1.7285847E−05

A16=
2.5997228E−02
1.6062881E−03
2.6157207E−05
8.2712986E−07

In the 2nd embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in Table 2C are the same as those stated in the 1st embodiment with corresponding values for the 2nd embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 2A and Table 2B as the following values and satisfy the following conditions:

TABLE 2C

Schematic Parameters

f [mm]
1.62
CT1/CT2
0.35

Fno
2.30
CT3/CT1
2.51

HFOV [deg.]
62.0
T23/CT2
0.11

FOV [deg.]
123.9
T12/T23
6.64

TL/f
4.64
T56/T23
0.29

TL/ImgH
2.47
T56/T34
0.42

TL × Fno/f
2.02
T56/T45
0.46

|f2/f1|
2.19
BL/CT5
3.23

|f2/f5|
1.38
CTmax/ATmax
1.91

|f2/f6|
1.97
(V2 + V5)/V1
0.68

(|f1| + |f2|)/|f5|
2.01
SAG1R2/CT1
2.04

(|f2| + |f3|)/(|f1| + |f6|)
21.47
CT3/ET3
1.15

f/R1
0.49
SAG6R1/CT6
0.24

|R1/R2|
3.70
ET2/ET1
1.1

R3/R1
0.72
SAG3R1/SAG5R2
−0.04

(R9 + R10)/(R9 − R10)
−3.54
Y6R1/Y5R2
1.30

(R11 + R12)/(R11 − R12)
−2.05
|DIST|max
13%

3RD EMBODIMENT

FIG. 5 is a schematic view of an image capturing unit according to the 3rd embodiment of the present disclosure. FIG. 6 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 3rd embodiment. In FIG. 5, the image capturing unit 3 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a stop S1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7, a filter E8 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The fifth lens element E5 with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has three inflection points. The image-side surface of the fifth lens element E5 has one critical point in an off-axis region thereof.

The sixth lens element E6 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The sixth lens element E6 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the sixth lens element E6 has one inflection point. The image-side surface of the sixth lens element E6 has one inflection point. The object-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The filter E8 is made of glass material and located between the filter E7 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The detailed optical data of the 3rd embodiment are shown in Table 3A and the aspheric surface data are shown in Table 3B below.

TABLE 3A

3rd Embodiment

f = 2.18 mm, Fno = 2.23, HFOV = 60.0 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
2.6778
(ASP)
0.379
Plastic
1.544
56.0
−2.42

2

0.8382
(ASP)
0.728

3
Stop
Plano
−0.197

4
Lens 2
2.6187
(ASP)
0.534
Plastic
1.669
19.5
5.75

5

7.5327
(ASP)
0.202

6
Ape. Stop
Plano
0.039

7
Lens 3
10.0491
(ASP)
1.109
Plastic
1.544
56.0
17.62

8

−200.0000
(ASP)
0.069

9
Stop
Plano
−0.018

10
Lens 4
2.0806
(ASP)
0.830
Plastic
1.544
56.0
2.18

11

−2.3691
(ASP)
0.098

12
Lens 5
−0.8830
(ASP)
0.502
Plastic
1.669
19.5
−2.64

13

−2.1697
(ASP)
0.030

14
Lens 6
1.3487
(ASP)
1.500
Plastic
1.544
56.0
2.88

15

5.8960
(ASP)
0.500

16
Filter
Plano
0.300
Glass
1.517
64.2
—

17

Plano
0.400

18
Filter
Plano
0.400
Glass
1.517
64.2
—

19

Plano
0.440

20
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 3) is 0.965 mm.

An effective radius of the stop S2 (Surface 9) is 0.970 mm.

TABLE 3B

Aspheric Coefficients

Surface #
1
2
4
5

k=
−6.9026000E+00
−8.3293900E−01
9.7478600E−01
−8.8063500E+01

A4=
−5.1274957E−02
−9.7349459E−02
5.9962397E−02
2.8027673E−01

A6=
1.9958958E−02
−3.5309553E−02
1.0592574E−01
4.6642227E−02

A8=
−2.9935464E−03
2.4032659E−02
−3.1824286E−01
−3.7218232E−01

A10=
2.3024239E−04
−2.6983467E−02
4.0885747E−01
1.8305993E+00

A12=
—
2.7530998E−02
−2.0734180E−01
−2.3359609E+00

Surface #
7
8
10
11

k=
−1.9991500E+00
0.0000000E+00
−2.4104800E+01
−6.6794500E+00

A4=
2.0956831E−01
−7.1597473E−01
−4.9717121E−01
−9.6092533E−02

A6=
−6.1220354E−01
1.9264827E+00
1.2598166E+00
2.3976598E−01

A8=
3.9197605E+00
−2.6556586E+00
−1.5305818E+00
−1.2509647E+00

A10=
−1.2548909E+01
1.8892126E+00
1.0221253E+00
2.3391989E+00

A12=
1.9292767E+01
−5.5421297E−01
−3.5609950E−01
−2.1704308E+00

A14=
−1.1491233E+01
1.3231917E−02
5.4501510E−02
1.0014379E+00

A16=
—
—
—
−1.7840046E−01

Surface #
12
13
14
15

k=
−8.3617300E−01
2.2886400E−01
−1.0107100E+00
−9.0000000E+01

A4=
8.8137595E−01
2.7733832E−01
−2.4812326E−01
3.3721108E−02

A6=
−1.1084022E+00
−2.0586172E−01
1.9751975E−01
−1.9273018E−02

A8=
4.9246795E−01
7.6096797E−02
−1.6113034E−01
2.6545705E−03

A10=
6.3974650E−01
1.1355470E−02
8.8881028E−02
6.6123604E−04

A12=
−1.1610704E+00
−2.7357620E−02
−3.0570443E−02
−3.2749537E−04

A14=
7.0616800E−01
1.3156901E−02
5.9763530E−03
4.9393526E−05

A16=
−1.5386583E−01
−2.2267553E−03
−5.0236570E−04
−2.6836821E−06

In the 3rd embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in Table 3C are the same as those stated in the 1st embodiment with corresponding values for the 3rd embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 3A and Table 3B as the following values and satisfy the following conditions:

TABLE 3C

Schematic Parameters

f [mm]
2.18
CT1/CT2
0.71

Fno
2.23
CT3/CT1
2.93

HFOV [deg.]
60.0
T23/CT2
0.45

FOV [deg.]
120.1
T12/T23
2.20

TL/f
3.60
T56/T23
0.12

TL/ImgH
2.61
T56/T34
0.59

TL × Fno/f
1.62
T56/T45
0.31

|f2/f1|
2.38
BL/CT5
4.06

|f2/f5|
2.18
CTmax/ATmax
2.82

|f2/f6|
2.00
(V2 + V5)/V1
0.70

(|f1| + |f2|)/|f5|
3.10
SAG1R2/CT1
1.60

(|f2| + |f3|)/(|f1| + |f6|)
4.41
CT3/ET3
1.15

f/R1
0.81
SAG6R1/CT6
0.17

|R1/R2|
3.19
ET2/ET1
0.6

R3/R1
0.98
SAG3R1/SAG5R2
−0.41

(R9 + R10)/(R9 − R10)
−2.37
Y6R1/Y5R2
1.20

(R11 + R12)/(R11 − R12)
−1.59
|DIST|max
21%

4TH EMBODIMENT

FIG. 7 is a schematic view of an image capturing unit according to the 4th embodiment of the present disclosure. FIG. 8 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 4th embodiment. In FIG. 7, the image capturing unit 4 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a stop S1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7, a filter E8 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The second lens element E2 with negative refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface being both aspheric.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The filter E8 is made of glass material and located between the filter E7 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The detailed optical data of the 4th embodiment are shown in Table 4A and the aspheric surface data are shown in Table 4B below.

TABLE 4A

4th Embodiment

f = 1.52 mm, Fno = 2.40, HFOV = 59.5 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
3.3640
(ASP)
0.634
Plastic
1.511
56.8
−2.61

2

0.8941
(ASP)
1.081

3
Stop
Plano
−0.065

4
Lens 2
2.5034
(ASP)
1.100
Plastic
1.669
19.5
−15.21

5

1.6552
(ASP)
0.160

6
Ape. Stop
Plano
−0.039

7
Lens 3
1.7424
(ASP)
1.041
Plastic
1.566
37.4
2.98

8

−42.9294
(ASP)
0.108

9
Stop
Plano
0.021

10
Lens 4
1.9382
(ASP)
0.928
Plastic
1.544
56.0
2.01

11

−2.0881
(ASP)
0.200

12
Lens 5
−0.6991
(ASP)
0.342
Plastic
1.669
19.5
−3.30

13

−1.2231
(ASP)
0.032

14
Lens 6
1.0242
(ASP)
0.633
Plastic
1.544
56.0
3.19

15

1.9537
(ASP)
0.600

16
Filter
Plano
0.300
Glass
1.517
64.2
—

17

Plano
0.200

18
Filter
Plano
0.300
Glass
1.517
64.2
—

19

Plano
0.154

20
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 3) is 1.266 mm.

An effective radius of the stop S2 (Surface 9) is 0.806 mm.

TABLE 4B

Aspheric Coefficients

Surface #
1
2
4
5

k=
−2.1761300E+00
−7.3900000E−01
−4.4365900E+00
−7.9592400E+00

A4=
1.0828331E−03
−2.9807220E−02
3.8194725E−02
3.5045390E−01

A6=
−2.5985011E−03
4.1776675E−02
−4.7971325E−03
−1.5425342E−01

A8=
5.8072343E−04
−6.7800789E−02
1.9890047E−03
9.8380728E−01

A10=
−3.7244810E−05
3.5198914E−02
−7.2346582E−03
−4.5854001E+00

A12=
—
−7.1480415E−03
3.8511879E−03
1.1052720E+01

Surface #
7
8
10
11

k=
−9.4545700E+00
−9.0000000E+01
−2.5479800E+01
−7.3279400E−01

A4=
2.3767013E−01
−5.4115820E−01
−1.3934415E−01
−3.5065871E−01

A6=
1.4444640E+00
1.6503275E+00
3.3780186E−01
6.7278508E−01

A8=
−2.1495695E+01
−4.4138083E+00
−5.8397649E−01
−5.5258319E−01

A10=
1.4499950E+02
8.0172618E+00
6.7286727E−01
−6.0471858E−01

A12=
−4.7024582E+02
−8.4497332E+00
−4.7461310E−01
1.5603859E+00

A14=
5.9170820E+02
4.1166887E+00
1.4036045E−01
−1.1623445E+00

A16=
—
—
—
2.9970011E−01

Surface #
12
13
14
15

k=
−8.1872500E−01
−6.9867800E−01
−1.1909600E+00
−4.4306500E+00

A4=
8.5352246E−01
5.3024066E−01
−2.2533294E−01
1.2096206E−02

A6=
−9.2636119E−01
−4.8249965E−01
1.3887058E−01
−1.5717014E−02

A8=
7.7032299E−01
2.4060815E−01
−7.4262860E−02
−9.7887640E−04

A10=
−9.6343233E−01
−6.0725674E−02
2.3019106E−02
2.0844606E−03

A12=
9.9914650E−01
2.8911870E−03
−3.9174279E−03
−5.6062397E−04

A14=
−5.3880023E−01
4.5641923E−03
3.5172709E−04
6.3735179E−05

A16=
1.1357969E−01
−1.2296154E−03
−1.3364579E−05
−2.6891835E−06

In the 4th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in Table 4C are the same as those stated in the 1st embodiment with corresponding values for the 4th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 4A and Table 4B as the following values and satisfy the following conditions:

TABLE 4C

Schematic Parameters

f [mm]
1.52
CT1/CT2
0.58

Fno
2.40
CT3/CT1
1.64

HFOV [deg.]
59.5
T23/CT2
0.11

FOV [deg.]
119.0
T12/T23
8.40

TL/f
5.10
T56/T23
0.26

TL/ImgH
2.62
T56/T34
0.25

TL × Fno/f
2.12
T56/T45
0.16

|f2/f1|
5.83
BL/CT5
4.54

|f2/f5|
4.60
CTmax/ATmax
1.08

|f2/f6|
4.77
(V2 + V5)/V1
0.69

(|f1| + |f2|)/|f5|
5.39
SAGIR2/CT1
1.63

(|f2| + |f3|)/(|f1| + |f6|)
3.14
CT3/ET3
1.15

f/R1
0.45
SAG6R1/CT6
0.57

|R1/R2|
3.76
ET2/ET1
1.0

R3/R1
0.74
SAG3R1/SAG5R2
−0.24

(R9 + R10)/(R9 − R10)
−3.67
Y6R1/Y5R2
1.49

(R11 + R12)/(R11 − R12)
−3.20
|DIST|max
15%

5TH EMBODIMENT

FIG. 9 is a schematic view of an image capturing unit according to the 5th embodiment of the present disclosure. FIG. 10 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 5th embodiment. In FIG. 9, the image capturing unit 5 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a stop S1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7, a filter E8 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The second lens element E2 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The image-side surface of the second lens element E2 has one inflection point. The image-side surface of the second lens element E2 has one critical point in an off-axis region thereof.

The third lens element E3 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The third lens element E3 is made of glass material and has the object-side surface and the image-side surface being both aspheric. The image-side surface of the third lens element E3 has two inflection points. The image-side surface of the third lens element E3 has one critical point in an off-axis region thereof.

The fourth lens element E4 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fourth lens element E4 is made of glass material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has one inflection point.

The fifth lens element E5 with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The image-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has two critical points in an off-axis region thereof.

The sixth lens element E6 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The sixth lens element E6 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the sixth lens element E6 has two inflection points. The image-side surface of the sixth lens element E6 has one inflection point. The object-side surface of the sixth lens element E6 has two critical points in an off-axis region thereof. The image-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The filter E8 is made of glass material and located between the filter E7 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The detailed optical data of the 5th embodiment are shown in Table 5A and the aspheric surface data are shown in Table 5B below.

TABLE 5A

5th Embodiment

f = 1.84 mm, Fno = 2.20, HFOV = 59.5 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
3.2306
(ASP)
0.496
Plastic
1.544
56.0
−2.34

2

0.8646
(ASP)
0.895

3
Stop
Plano
−0.200

4
Lens 2
3.2822
(ASP)
0.765
Plastic
1.587
28.3
5.51

5

−200.0000
(ASP)
0.241

6
Ape. Stop
Plano
−0.043

7
Lens 3
5.0867
(ASP)
1.162
Glass
1.511
60.5
11.94

8

28.2338
(ASP)
0.087

9
Stop
Plano
−0.001

10
Lens 4
1.8919
(ASP)
1.082
Glass
1.534
55.5
1.98

11

−1.9144
(ASP)
0.220

12
Lens 5
−0.6997
(ASP)
0.428
Plastic
1.669
19.5
−2.62

13

−1.4500
(ASP)
0.030

14
Lens 6
1.1560
(ASP)
0.746
Plastic
1.544
56.0
3.26

15

2.5696
(ASP)
0.500

16
Filter
Plano
0.300
Glass
1.517
64.2
—

17

Plano
0.300

18
Filter
Plano
0.400
Glass
1.517
64.2
—

19

Plano
0.240

20
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 3) is 1.029 mm.

An effective radius of the stop S2 (Surface 9) is 0.855 mm.

TABLE 5B

Aspheric Coefficients

Surface #
1
2
4
5

k=
−2.8391400E+00
−7.2110700E−01
5.7412600E−01
−9.0000000E+01

A4=
−2.6792639E−02
−5.9987410E−02
5.1954480E−02
2.9599074E−01

A6=
6.1188693E−03
4.1872174E−02
3.7623440E−02
−9.9654967E−02

A8=
−5.5615753E−04
−9.6368286E−02
−2.8843283E−02
6.5892526E−01

A10=
3.4993206E−05
9.6464685E−02
5.1278745E−02
−8.8127212E−01

A12=
—
−3.1426081E−02
−3.7873993E−02
2.9708150E−01

Surface #
7
8
10
11

k=
1.1541000E+01
−7.8534100E+01
−2.9996800E+01
−4.5115200E+00

A4=
2.5939771E−01
−6.2571983E−01
−1.0869913E−01
−2.3617310E−01

A6=
−1.3093348E−01
1.8366379E+00
1.5703172E−01
3.4766557E−01

A8=
1.0108954E−01
−3.9496114E+00
7.2755813E−03
−5.5250411E−01

A10=
1.4084646E+00
5.7457095E+00
−3.1686634E−01
5.7579717E−01

A12=
−5.1182640E+00
−4.8677561E+00
3.4593211E−01
−3.2891717E−01

A14=
5.0771409E+00
1.8924773E+00
−1.0305226E−01
5.8577405E−02

A16=
—
−
−
1.4982751E−02

Surface #
12
13
14
15

k=
−8.7936400E−01
−2.7605600E−01
−1.1786100E+00
−4.0418100E+00

A4=
8.1763692E−01
4.0615908E−01
−2.1897663E−01
−7.9690506E−03

A6=
−1.2030890E+00
−4.8805321E−01
1.2416712E−01
−1.3017040E−02

A8=
1.4061943E+00
5.4540991E−01
−6.6054326E−02
1.8805468E−03

A10=
−1.1092396E+00
−4.2474849E−01
2.1778471E−02
1.1351929E−03

A12=
4.6675531E−01
2.0705511E−01
−3.9319732E−03
−4.9794361E−04

A14=
−5.0728295E−02
−5.4413710E−02
3.6186396E−04
7.3690660E−05

A16=
−1.4538159E−02
5.8537698E−03
−1.3345917E−05
−3.8257078E−06

In the 5th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in Table 5C are the same as those stated in the 1st embodiment with corresponding values for the 5th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 5A and Table 5B as the following values and satisfy the following conditions:

TABLE 5C

Schematic Parameters

f [mm]
1.84
CT1/CT2
0.65

Fno
2.20
CT3/CT1
2.34

HFOV [deg.]
59.5
T23/CT2
0.26

FOV [deg.]
119.0
T12/T23
3.51

TL/f
4.15
T56/T23
0.15

TL/ImgH
2.55
T56/T34
0.35

TL × Fno/f
1.89
T56/T45
0.14

|f2/f1|
2.35
BL/CT5
4.07

|f2/f5|
2.10
CTmax/ATmax
1.67

|f2/f6|
1.69
(V2 + V5)/V1
0.85

(|f1| + |f2|)/|f5|
3.00
SAG1R2/CT1
1.56

(|f2| + |f3|)/(|f1| + |f6|)
3.11
CT3/ET3
1.13

f/R1
0.57
SAG6R1/CT6
0.44

|R1/R2|
3.74
ET2/ET1
0.7

R3/R1
1.02
SAG3R1/SAG5R2
−0.30

(R9 + R10)/(R9 − R10)
−2.87
Y6R1/Y5R2
1.40

(R11 + R12)/(R11 − R12)
−2.64
|DIST|max
5%

6TH EMBODIMENT

FIG. 11 is a schematic view of an image capturing unit according to the 6th embodiment of the present disclosure. FIG. 12 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 6th embodiment. In FIG. 11, the image capturing unit 6 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a stop S1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7, a filter E8 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The third lens element E3 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The third lens element E3 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The image-side surface of the third lens element E3 has two inflection points. The image-side surface of the third lens element E3 has one critical point in an off-axis region thereof.

The sixth lens element E6 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The sixth lens element E6 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the sixth lens element E6 has two inflection points. The image-side surface of the sixth lens element E6 has one inflection point. The object-side surface of the sixth lens element E6 has two critical points in an off-axis region thereof. The image-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The filter E8 is made of glass material and located between the filter E7 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The detailed optical data of the 6th embodiment are shown in Table 6A and the aspheric surface data are shown in Table 6B below.

TABLE 6A

6th Embodiment

f = 1.49 mm, Fno = 1.90, HFOV = 60.0 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
6.3199
(ASP)
0.594
Plastic
1.511
56.8
−2.36

2

0.9814
(ASP)
0.935

3
Stop
Plano
−0.244

4
Lens 2
2.4999
(ASP)
1.395
Plastic
1.669
19.5
6.25

5

4.8298
(ASP)
0.077

6
Ape. Stop
Plano
0.087

7
Lens 3
4.7870
(ASP)
0.776
Plastic
1.515
56.4
10.00

8

63.5432
(ASP)
0.084

9
Stop
Plano
−0.005

10
Lens 4
2.0653
(ASP)
0.848
Plastic
1.544
56.0
1.94

11

−1.8507
(ASP)
0.171

12
Lens 5
−0.7224
(ASP)
0.414
Plastic
1.697
16.3
−4.07

13

−1.1972
(ASP)
0.030

14
Lens 6
1.1334
(ASP)
0.797
Plastic
1.544
56.0
3.39

15

2.2074
(ASP)
0.450

16
Filter
Plano
0.300
Glass
1.517
64.2
—

17

Plano
0.200

18
Filter
Plano
0.400
Glass
1.517
64.2
—

19

Plano
0.196

20
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 3) is 1.285 mm.

An effective radius of the stop S2 (Surface 9) is 0.927 mm.

TABLE 6B

Aspheric Coefficients

Surface #
1
2
4
5

k=
−5.2991600E+00
−7.8876400E−01
−1.1642400E+01
−5.5352600E+01

A4=
−1.1362919E−02
−7.1039999E−02
7.2534165E−02
1.9766895E−01

A6=
3.9152612E−03
5.8294030E−03
−8.4142564E−02
−9.6518569E−02

A8=
−4.2715818E−04
−2.5435865E−02
5.6977154E−02
1.1038530E+00

A10=
2.0783468E−05
2.0975046E−02
−1.6009831E−02
−3.6650594E+00

A12=
—
−3.8553267E−03
1.0796869E−03
4.8207896E+00

Surface #
7
8
10
11

k=
−5.4293900E+01
−9.0000000E+01
−3.8015800E+01
−6.7939600E+00

A4=
1.9184989E−01
−5.8025080E−01
−1.1919122E−01
−3.2058223E−01

A6=
−9.9729927E−02
1.4201468E+00
5.7902626E−03
8.5425655E−01

A8=
8.1274282E−01
−2.3965819E+00
4.4314222E−01
−1.8809795E+00

A10=
−2.7979665E+00
2.9110951E+00
−6.7282183E−01
2.4736944E+00

A12=
4.3661663E+00
−2.2786810E+00
4.1902574E−01
−1.8641347E+00

A14=
−2.5262077E+00
8.4859511E−01
−9.8654841E−02
7.4630021E−01

A16=
—
—
—
−1.2006349E−01

Surface #
12
13
14
15

k=
−9.4480100E−01
−6.8157100E−01
−1.1039700E+00
−1.9571000E+00

A4=
8.1154119E−01
3.8129160E−01
−2.1713706E−01
−4.0252463E−02

A6=
−6.9451710E−01
−2.8920302E−01
1.2785922E−01
1.5091970E−02

A8=
8.6997894E−02
3.0269458E−01
−6.4823048E−02
−1.1772422E−02

A10=
6.0589242E−01
−2.8178475E−01
1.9533462E−02
5.0906481E−03

A12=
−8.1961110E−01
1.5193694E−01
−3.2533591E−03
−1.1297834E−03

A14=
4.5289542E−01
−4.0394314E−02
2.8305640E−04
1.2219936E−04

A16=
−9.2095144E−02
4.1351670E−03
−1.0176116E−05
−5.1130955E−06

In the 6th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in Table 6C are the same as those stated in the 1st embodiment with corresponding values for the 6th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 6A and Table 6B as the following values and satisfy the following conditions:

TABLE 6C

Schematic Parameters

f [mm]
1.49
CT1/CT2
0.43

Fno
1.90
CT3/CT1
1.31

HFOV [deg.]
60.0
T23/CT2
0.12

FOV [deg.]
119.9
T12/T23
4.21

TL/f
5.03
T56/T23
0.18

TL/ImgH
2.63
T56/T34
0.38

TL × Fno/f
2.65
T56/T45
0.18

|f2/f1|
2.64
BL/CT5
3.73

|f2/f5|
1.53
CTmax/ATmax
2.02

|f2/f6|
1.84
(V2 + V5)/V1
0.63

(|f1| + |f2|)/|f5|
2.11
SAG1R2/CT1
1.45

(|f2| + |f3|)/(|f1| + |f6|)
2.82
CT3/ET3
1.26

f/R1
0.24
SAG6R1/CT6
0.51

|R1/R2|
6.44
ET2/ET1
1.2

R3/R1
0.40
SAG3R1/SAG5R2
−0.25

(R9 + R10)/(R9 − R10)
−4.04
Y6R1/Y5R2
1.47

(R11 + R12)/(R11 − R12)
−3.11
|DIST|max
15%

7TH EMBODIMENT

FIG. 13 is a schematic view of an image capturing unit according to the 7th embodiment of the present disclosure. FIG. 14 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 7th embodiment. In FIG. 13, the image capturing unit 7 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S1, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The third lens element E3 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The third lens element E3 is made of glass material and has the object-side surface and the image-side surface being both aspheric.

The fourth lens element E4 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the fourth lens element E4 has one inflection point. The image-side surface of the fourth lens element E4 has one inflection point.

The fifth lens element E5 with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the fifth lens element E5 has three inflection points. The image-side surface of the fifth lens element E5 has four inflection points. The image-side surface of the fifth lens element E5 has two critical points in an off-axis region thereof.

The sixth lens element E6 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The sixth lens element E6 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the sixth lens element E6 has two inflection points. The image-side surface of the sixth lens element E6 has two inflection points. The object-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The detailed optical data of the 7th embodiment are shown in Table 7A and the aspheric surface data are shown in Table 7B below.

TABLE 7A

7th Embodiment

f = 1.56 mm, Fno = 2.15, HFOV = 65.1 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
3.3190
(ASP)
0.371
Plastic
1.511
56.8
−2.35

2

0.8483
(ASP)
0.489

3
Lens 2
2.3973
(ASP)
0.890
Plastic
1.686
18.4
8.21

4

3.5420
(ASP)
0.167

5
Ape. Stop
Plano
0.021

6
Lens 3
8.4380
(ASP)
0.715
Glass
1.523
58.7
3.32

7

−2.1231
(ASP)
0.200

8
Stop
Plano
0.191

9
Lens 4
6.9331
(ASP)
0.755
Plastic
1.544
56.0
4.99

10

−4.2928
(ASP)
0.155

11
Lens 5
−0.8924
(ASP)
0.360
Plastic
1.697
16.3
−5.24

12

−1.3769
(ASP)
0.030

13
Lens 6
1.0316
(ASP)
0.931
Plastic
1.544
56.0
2.46

14

3.0580
(ASP)
0.550

15
Filter
Plano
0.300
Glass
1.517
64.2
—

16

Plano
0.580

17
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 8) is 0.956 mm.

TABLE 7B

Aspheric Coefficients

Surface #
1
2
3
4

k=
−2.9570800E+00
−9.5220300E−01
−4.4663900E+00
−2.3564700E+01

A4=
−4.9998068E−02
−1.1628791E−01
2.6898816E−02
2.4291926E−01

A6=
2.0020338E−02
−2.8557219E−02
−7.8446360E−02
2.1195322E−01

A8=
−3.4686916E−03
−5.6607090E−02
1.1009655E−01
1.5201832E−01

A10=
2.4356823E−04
1.1717992E−01
−3.0695358E−02
2.0694272E−01

A12=
—
−3.8618873E−02
−4.5218162E−03
9.3999295E−01

Surface #
6
7
9
10

k=
−6.7847600E+00
−3.3313000E+01
1.0000000E+00
−9.2217800E+00

A4=
1.4306357E−01
−5.1805151E−01
−1.6484173E−01
−5.5573143E−01

A6=
−1.5851677E−01
1.5568122E+00
2.8847043E−01
1.1694051E+00

A8=
3.6393505E+00
−4.0744478E+00
−1.9779697E−01
−1.6826137E+00

A10=
−1.9523966E+01
7.0510162E+00
5.5845124E−02
1.5693647E+00

A12=
5.2474749E+01
−7.0668044E+00
4.4011390E−03
−8.6858547E−01

A14=
−5.5962825E+01
3.2803554E+00
−5.1395004E−03
2.6047735E−01

A16=
—
—
—
−3.2581654E−02

Surface #
11
12
13
14

k=
−8.7873900E−01
−6.4389300E−01
−1.0808200E+00
−1.3598700E+00

A4=
7.4618160E−01
5.3338015E−01
−2.2238162E−01
−3.9225459E−02

A6=
−6.9251114E−01
−4.7141305E−01
1.1783361E−01
2.3215060E−02

A8=
3.4965726E−01
2.8543189E−01
−4.5572337E−02
−1.0994177E−02

A10=
−8.4699870E−02
−1.3935639E−01
9.3405529E−03
2.8314865E−03

A12=
−2.6882717E−02
5.0653856E−02
−9.0183977E−04
−4.0849329E−04

A14=
3.0539672E−02
−1.0434088E−02
2.9248640E−05
2.9544185E−05

A16=
−6.8150426E−03
8.5934166E−04
4.0656482E−07
−7.8193728E−07

In the 7th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in Table 7C are the same as those stated in the 1st embodiment with corresponding values for the 7th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 7A and Table 7B as the following values and satisfy the following conditions:

TABLE 7C

Schematic Parameters

f[mm]
1.56
CT1/CT2
0.42

Fno
2.15
CT3/CT1
1.93

HFOV [deg.]
65.1
T23/CT2
0.21

FOV [deg.]
130.3
T12/T23
2.60

TL/f
4.30
T56/T23
0.16

TL/ImgH
2.11
T56/T34
0.08

TL × Fno/f
2.00
T56/T45
0.19

|f2/f1|
3.50
BL/CT5
3.97

|f2/f5|
1.57
CTmax/ATmax
1.90

|f2/f6|
3.34
(V2 + V5)/V1
0.61

(|f1| + |f2|)/|f5|
2.02
SAG1R2/CT1
1.94

(|f2| + |f3|)/(|f1| + |f6|)
2.40
CT3/ET3
1.34

f/R1
0.47
SAG6R1/CT6
0.48

|R1/R2|
3.91
ET2/ET1
1.0

R3/R1
0.72
SAG3R1/SAG5R2
−0.13

(R9 + R10)/(R9 − R10)
−4.68
Y6R1/Y5R2
1.40

(R11 + R12)/(R11 − R12)
−2.02
|DIST|max
15%

8TH EMBODIMENT

FIG. 15 is a schematic view of an image capturing unit according to the 8th embodiment of the present disclosure. FIG. 16 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 8th embodiment. In FIG. 15, the image capturing unit 8 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S1, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The fourth lens element E4 with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The image-side surface of the fourth lens element E4 has one inflection point.

The fifth lens element E5 with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has four inflection points.

The sixth lens element E6 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The sixth lens element E6 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the sixth lens element E6 has two inflection points. The image-side surface of the sixth lens element E6 has three inflection points. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region thereof.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The detailed optical data of the 8th embodiment are shown in Table 8A and the aspheric surface data are shown in Table 8B below.

TABLE 8A

8th Embodiment

f = 1.46 mm, Fno = 2.20, HFOV = 64.9 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
3.8202
(ASP)
0.425
Plastic
1.526
60.2
−2.24

2

0.8656
(ASP)
0.517

3
Lens 2
1.9754
(ASP)
0.996
Plastic
1.650
21.8
10.98

4

2.1894
(ASP)
0.341

5
Ape. Stop
Plano
0.005

6
Lens 3
3.0842
(ASP)
0.619
Plastic
1.544
56.0
1.82

7

−1.3553
(ASP)
0.329

8
Stop
Plano
0.328

9
Lens 4
−1.8970
(ASP)
0.485
Plastic
1.544
56.0
−12.19

10

−2.8968
(ASP)
0.055

11
Lens 5
−0.9077
(ASP)
0.300
Plastic
1.697
16.3
−5.72

12

−1.3349
(ASP)
0.030

13
Lens 6
1.0909
(ASP)
1.244
Plastic
1.544
56.0
1.98

14

−50.0000
(ASP)
0.550

15
Filter
Plano
0.300
Glass
1.517
64.2
—

16

Plano
0.283

17
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 8) is 0.829 mm.

TABLE 8B

Aspheric Coefficients

Surface #
1
2
3
4

k=
−4.1837500E+00
−9.7024600E−01
−4.8505700E+00
−1.8282200E+01

A4=
−5.2404231E−02
−1.2818921E−01
5.3414486E−02
3.6330705E−01

A6=
1.8651347E−02
−6.0957050E−02
−7.9009092E−02
−2.0124062E−02

A8=
−2.6986556E−03
7.2467951E−02
9.3142133E−02
2.6990107E−01

A10=
1.5837543E−04
−5.4799151E−03
−4.7460041E−02
−1.2637735E+00

A12=
—
−3.9260634E−03
5.8021578E−03
2.8643660E+00

Surface #
6
7
9
10

k=
−3.4297500E+01
−1.3920500E+01
1.0000000E+00
1.0000000E+00

A4=
1.9161318E−01
−6.9481419E−01
−1.7168085E−01
−1.0209467E+00

A6=
−1.3170214E−01
2.1069979E+00
7.9027663E−01
3.9497143E+00

A8=
−1.9497233E+00
−6.5532656E+00
−1.8257423E+00
−1.0706878E+01

A10=
1.7651010E+01
1.4274433E+01
3.0573678E+00
1.6873888E+01

A12=
−6.2795122E+01
−1.8659464E+01
−3.0682980E+00
−1.4479863E+01

A14=
8.2040718E+01
1.0852647E+01
1.2193688E+00
6.1638369E+00

A16=
—
—
—
−9.8614356E−01

Surface #
11
12
13
14

k=
−7.4188400E−01
−6.1750200E−01
−1.0949700E+00
1.0000000E+00

A4=
8.9646384E−01
8.8297038E−01
−2.6981677E−01
3.2375958E−02

A6=
−6.7490462E−01
−1.6432460E+00
1.4313579E−01
−1.6899688E−02

A8=
−2.4821865E+00
1.8160082E+00
−5.2493628E−02
5.1005817E−03

A10=
6.9202347E+00
−1.2042143E+00
1.2146927E−02
−1.3295757E−03

A12=
−7.2654714E+00
4.7584743E−01
−1.6804092E−03
2.5085638E−04

A14=
3.5394877E+00
−1.0281669E−01
1.2714214E−04
−2.6781722E−05

A16=
−6.6306344E−01
9.2905543E−03
−4.0449629E−06
1.1549023E−06

In the 8th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in Table 8C are the same as those stated in the 1st embodiment with corresponding values for the 8th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 8A and Table 8B as the following values and satisfy the following conditions:

TABLE 8C

Schematic Parameters

f [mm]
1.46
CT1/CT2
0.43

Fno
2.20
CT3/CT1
1.46

HFOV [deg.]
64.9
T23/CT2
0.35

FOV [deg.]
129.9
T12/T23
1.49

TL/f
4.66
T56/T23
0.09

TL/ImgH
2.14
T56/T34
0.05

TL × Fno/f
2.12
T56/T45
0.55

|f2/f1|
4.91
BL/CT5
3.78

|f2/f5|
1.92
CTmax/ATmax
1.89

|f2/f6|
5.55
(V2 + V5)/V1
0.63

(|f1| + |f2|)/|f5|
2.31
SAG1R2/CT1
1.83

(|f2| + |f3|)/(|f1| + |f6|)
3.04
CT3/ET3
1.56

f/R1
0.38
SAG6R1/CT6
0.41

|R1/R2|
4.41
ET2/ET1
1.0

|R3/R1|
0.52
SAG3R1/SAG5R2
−0.16

(R9 + R10)/(R9 − R10)
−5.25
Y6R1/Y5R2
1.69

(R11 + R12)/(R11 − R12)
−0.96
|DIST|max
20%

9TH EMBODIMENT

FIG. 17 is a schematic view of an image capturing unit according to the 9th embodiment of the present disclosure. FIG. 18 shows, in order from left to right, spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing unit according to the 9th embodiment. In FIG. 17, the image capturing unit 9 includes the photographing lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a stop S1, a second lens element E2, an aperture stop ST, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a filter E7, a filter E8 and an image surface IMG. The photographing lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) with no additional lens element disposed between each of the adjacent six lens elements, wherein there is an air gap between each of all adjacent lens elements.

The sixth lens element E6 with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The sixth lens element E6 is made of plastic material and has the object-side surface and the image-side surface being both aspheric. The object-side surface of the sixth lens element E6 has two inflection points. The image-side surface of the sixth lens element E6 has two inflection points. The object-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has one critical point in an off-axis region thereof.

The filter E7 is made of glass material and located between the sixth lens element E6 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The filter E8 is made of glass material and located between the filter E7 and the image surface IMG, and will not affect the focal length of the photographing lens assembly.

The image sensor IS is disposed on or near the image surface IMG of the photographing lens assembly.

The detailed optical data of the 9th embodiment are shown in Table 9A and the aspheric surface data are shown in Table 9B below.

TABLE 9A

9th Embodiment

f = 1.61 mm, Fno = 2.18, HFOV = 60.0 deg.

Surface #

Curvature Radius
Thickness
Material
Index
Abbe #
Focal Length

0
Object
Plano
Infinity

1
Lens 1
11.1576
(ASP)
0.699
Plastic
1.511
56.8
−2.30

2

1.0418
(ASP)
1.014

3
Stop
Plano
−0.290

4
Lens 2
2.3306
(ASP)
1.567
Plastic
1.656
21.3
6.84

5

3.5559
(ASP)
0.086

6
Ape. Stop
Plano
0.055

7
Lens 3
3.7892
(ASP)
0.836
Plastic
1.511
56.8
7.01

8

−60.8066
(ASP)
0.081

9
Stop
Plano
−0.006

10
Lens 4
2.2256
(ASP)
0.673
Plastic
1.544
56.0
1.85

11

−1.6401
(ASP)
0.287

12
Lens 5
−0.6913
(ASP)
0.336
Plastic
1.697
16.3
−3.83

13

−1.1193
(ASP)
0.250

14
Lens 6
1.2140
(ASP)
0.704
Plastic
1.544
56.0
4.39

15

1.9653
(ASP)
0.500

16
Filter
Plano
0.300
Glass
1.517
64.2
—

17

Plano
0.250

18
Filter
Plano
0.400
Glass
1.517
64.2
—

19

Plano
0.111

20
Image
Plano
—

Note:

Reference wavelength is 587.6 nm (d-line).

An effective radius of the stop S1 (Surface 3) is 1.352 mm.

An effective radius of the stop S2 (Surface 9) is 0.893 mm.

TABLE 9B

Aspheric Coefficients

Surface #
1
2
4
5

k=
−2.9493700E+00
−7.3695800E−01
−7.0622100E+00
−2.8971400E+01

A4=
−6.6982836E−03
−6.6241523E−02
4.8587710E−02
2.2971219E−01

A6=
2.7356893E−03
1.4430370E−02
−4.7371800E−02
−9.2312048E−02

A8=
−3.0723540E−04
−2.2327143E−02
3.4910792E−02
8.5958255E−01

A10=
1.3575135E−05
2.0458253E−02
−1.2220603E−02
−3.0285153E+00

A12=
—
−4.9311365E−03
1.2071597E−03
4.2990593E+00

Surface #
7
8
10
11

k=
−2.9516100E+01
5.0000000E+00
−3.5164400E+01
−1.2795600E+01

A4=
2.0666771E−01
−4.8617416E−01
−5.6667615E−02
−1.6104110E−01

A6=
−3.1572901E−01
6.9164982E−01
−3.2108780E−01
3.2864660E−01

A8=
2.2709570E+00
−2.6650384E−01
1.2533096E+00
−1.2675235E+00

A10=
−8.7504540E+00
−6.6414521E−01
−1.7113803E+00
2.7007356E+00

A12=
1.6068066E+01
8.2359743E−01
1.0971248E+00
−2.8205681E+00

A14=
−1.1290420E+01
−2.4856575E−01
−2.7588784E−01
1.4073863E+00

A16=
—
—
—
−2.6383778E−01

Surface #
12
13
14
15

k=
−9.4682500E−01
−7.2985100E−01
−1.0135500E+00
−2.6050100E+00

A4=
1.1135703E+00
4.7446961E−01
−2.1727826E−01
−3.5764808E−02

A6=
−2.1572718E+00
−7.0041536E−01
1.2359248E−01
−2.3793051E−03

A8=
3.4774844E+00
1.1064176E+00
−6.3791532E−02
7.6413823E−03

A10=
−3.7922896E+00
−1.1082789E+00
2.3915252E−02
−4.5861364E−03

A12=
2.5665681E+00
6.3631084E−01
−6.5088623E−03
1.4348961E−03

A14=
−1.0416860E+00
−2.0463436E−01
1.1899423E−03
−2.5130345E−04

A16=
1.9768916E−01
3.4187331E−02
−1.2435504E−04
2.2738519E−05

A18=
—
−2.3069006E−03
5.4769258E−06
−8.1244967E−07

In the 9th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in Table 9C are the same as those stated in the 1st embodiment with corresponding values for the 9th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 9A and Table 9B as the following values and satisfy the following conditions:

TABLE 9C

Schematic Parameters

f [mm]
1.61
CT1/CT2
0.45

Fno
2.18
CT3/CT1
1.20

HFOV [deg.]
60.0
T23/CT2
0.09

FOV [deg.]
120.0
T12/T23
5.13

TL/f
4.86
T56/T23
1.77

TL/ImgH
2.71
T56/T34
3.33

TL × Fno/f
2.23
T56/T45
0.87

|f2/f1|
2.97
BL/CT5
4.65

|f2/f5|
1.79
CTmax/ATmax
2.16

|f2/f6|
1.56
(V2 + V5)/V1
0.66

(|f1| + |f2|)/|f5
2.39
SAG1R2/CT1
1.36

(|f2| + |f3|)/(|f1| + |f6|)
2.07
CT3/ET3
1.26

f/R1
0.14
SAG6R1/CT6
0.45

|R1/R2|
10.71
ET2/ET1
1.1

R3/R1
0.21
SAG3R1/SAG5R2
−0.19

(R9 + R10)/(R9 − R10)
−4.23
Y6R1/Y5R2
1.53

(R11 + R12)/(R11 − R12)
−4.23
|DIST|max
10%

10TH EMBODIMENT

FIG. 19 is a perspective view of an image capturing unit according to the 10th embodiment of the present disclosure. In this embodiment, an image capturing unit 100 is a camera module including a lens unit 101, a driving device 102, an image sensor 103 and an image stabilizer 104. The lens unit 101 includes the photographing lens assembly disclosed in the 1st embodiment, a barrel and a holder member (their reference numerals are omitted) for holding the photographing lens assembly. However, the lens unit 101 may alternatively be provided with the photographing lens assembly disclosed in other embodiments of the present disclosure, and the present disclosure is not limited thereto. The imaging light converges in the lens unit 101 of the image capturing unit 100 to generate an image with the driving device 102 utilized for image focusing on the image sensor 103, and the generated image is then digitally transmitted to other electronic component for further processing.

The driving device 102 can have auto focusing functionality, and different driving configurations can be obtained through the usages of voice coil motors (VCM), micro electro-mechanical systems (MEMS), piezoelectric systems, or shape memory alloy materials. The driving device 102 is favorable for obtaining a better imaging position of the lens unit 101, so that a clear image of the imaged object can be captured by the lens unit 101 with different object distances. The image sensor 103 (for example, CCD or CMOS), which can feature high photosensitivity and low noise, is disposed on the image surface of the photographing lens assembly to provide higher image quality.

The image stabilizer 104, such as an accelerometer, a gyro sensor and a Hall effect sensor, is configured to work with the driving device 102 to provide optical image stabilization (OIS). The driving device 102 working with the image stabilizer 104 is favorable for compensating for pan and tilt of the lens unit 101 to reduce blurring associated with motion during exposure. In some cases, the compensation can be provided by electronic image stabilization (EIS) with image processing software, thereby improving image quality while in motion or low-light conditions.

11TH EMBODIMENT

FIG. 20 is a perspective view of an electronic device according to the 11th embodiment of the present disclosure. FIG. 21 is another perspective view of the electronic device in FIG. 20.

In this embodiment, an electronic device 200 is a smartphone including the image capturing unit 100 disclosed in the 10th embodiment, an image capturing unit 100a, an image capturing unit 100b, an image capturing unit 100c and a display unit 201. As shown in FIG. 20, the image capturing unit 100, the image capturing unit 100a and the image capturing unit 100b are disposed on the same side of the electronic device 200 and face the same side, and each of the image capturing units 100, 100a and 100b has a single focal point. As shown in FIG. 21, the image capturing unit 100c and the display unit 201 are disposed on the opposite side of the electronic device 200, such that the image capturing unit 100c can be a front-facing camera of the electronic device 200 for taking selfies, but the present disclosure is not limited thereto. Furthermore, each of the image capturing units 100a, 100b and 100c can include the photographing lens assembly of the present disclosure and can have a configuration similar to that of the image capturing unit 100. In detail, each of the image capturing units 100a, 100b and 100c can include a lens unit, a driving device, an image sensor and an image stabilizer, and each of the lens unit can include a photographing lens assembly such as the photographing lens assembly of the present disclosure, a barrel and a holder member for holding the photographing lens assembly.

The image capturing unit 100 is an ultra-wide-angle image capturing unit, the image capturing unit 100a is a telephoto image capturing unit, the image capturing unit 100b is a wide-angle image capturing unit, and the image capturing unit 100c is a wide-angle image capturing unit. In this embodiment, the image capturing units 100, 100a and 100b have different fields of view, such that the electronic device 200 can have various magnification ratios so as to meet the requirement of optical zoom functionality. Moreover, as shown in FIG. 21, the image capturing unit 100c can have a non-circular opening, and the lens barrel or the lens elements in the image capturing unit 100c can have one or more trimmed edges at outer diameter positions thereof for corresponding to the non-circular opening. Therefore, it is favorable for further reducing the length of the image capturing unit 100c along single axis, thereby reducing the overall size of the lens, increasing the area ratio of the display unit 201 with respect to the electronic device 200, reducing the thickness of the electronic device 200, and achieving compactness of the overall module. In this embodiment, the electronic device 200 includes multiple image capturing units 100, 100a, 100b and 100c, but the present disclosure is not limited to the number and arrangement of image capturing units.

12TH EMBODIMENT

FIG. 22 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure. FIG. 23 is another perspective view of the electronic device in FIG. 22. FIG. 24 is a block diagram of the electronic device in FIG. 22.

In this embodiment, an electronic device 300 is a smartphone including the image capturing unit 100 disclosed in the 10th embodiment, an image capturing unit 100d, an image capturing unit 100e, an image capturing unit 100f, an image capturing unit 100g, a flash module 301, a focus assist module 302, an image signal processor 303, a display module 304 and an image software processor 305. The image capturing unit 100 and the image capturing unit 100d are disposed on the same side of the electronic device 300. The focus assist module 302 can be a laser rangefinder or a ToF (time of flight) module, but the present disclosure is not limited thereto. The image capturing unit 100e, the image capturing unit 100f, the image capturing unit 100g and the display module 304 are disposed on the opposite side of the electronic device 300, and the display module 304 can be a user interface, such that the image capturing units 100e, 100f, 100g can be front-facing cameras of the electronic device 300 for taking selfies, but the present disclosure is not limited thereto. Furthermore, each of the image capturing units 100d, 100e, 100f and 100g can include the photographing lens assembly of the present disclosure and can have a configuration similar to that of the image capturing unit 100. In detail, each of the image capturing units 100d, 100e, 100f and 100g can include a lens unit, a driving device, an image sensor and an image stabilizer, and each of the lens unit can include a photographing lens assembly such as the photographing lens assembly of the present disclosure, a barrel and a holder member for holding the photographing lens assembly.

The image capturing unit 100 is an ultra-wide-angle image capturing unit, the image capturing unit 100d is a wide-angle image capturing unit, the image capturing unit 100e is a wide-angle image capturing unit, the image capturing unit 100f is an ultra-wide-angle image capturing unit, and the image capturing unit 100g is a ToF image capturing unit. In this embodiment, the image capturing units 100 and 100d have different fields of view, such that the electronic device 300 can have various magnification ratios so as to meet the requirement of optical zoom functionality. In addition, the image capturing unit 100g can determine depth information of the imaged object. In this embodiment, the electronic device 300 includes multiple image capturing units 100, 100d, 100e, 100f and 100g, but the present disclosure is not limited to the number and arrangement of image capturing units.

When a user captures images of an object 306, the light rays converge in the image capturing unit 100 or the image capturing unit 100d to generate images, and the flash module 301 is activated for light supplement. The focus assist module 302 detects the object distance of the imaged object 306 to achieve fast auto focusing. The image signal processor 303 is configured to optimize the captured image to improve image quality. The light beam emitted from the focus assist module 302 can be either conventional infrared or laser. In addition, the light rays may converge in the image capturing unit 100e, 100f or 100g to generate images. The display module 304 can include a touch screen, and the user is able to interact with the display module 304 and the image software processor 305 having multiple functions to capture images and complete image processing. Alternatively, the user may capture images via a physical button. The image processed by the image software processor 305 can be displayed on the display module 304.

13TH EMBODIMENT

FIG. 25 is a perspective view of an electronic device according to the 13th embodiment of the present disclosure.

In this embodiment, an electronic device 400 is a smartphone including the image capturing unit 100 disclosed in the 10th embodiment, an image capturing unit 100h, an image capturing unit 100i, a flash module 401, a focus assist module, an image signal processor, a display module and an image software processor (not shown). The image capturing unit 100, the image capturing unit 100h and the image capturing unit 100i are disposed on the same side of the electronic device 400, while the display module is disposed on the opposite side of the electronic device 400. Furthermore, each of the image capturing units 100h and 100i can include the photographing lens assembly of the present disclosure and can have a configuration similar to that of the image capturing unit 100, and the details in this regard will not be provided again.

The image capturing unit 100 is an ultra-wide-angle image capturing unit, the image capturing unit 100h is a telephoto image capturing unit, and the image capturing unit 100i is a wide-angle image capturing unit. In this embodiment, the image capturing units 100, 100h and 100i have different fields of view, such that the electronic device 400 can have various magnification ratios so as to meet the requirement of optical zoom functionality. Moreover, the image capturing unit 100h can be a telephoto image capturing unit having a light-folding element configuration, such that the total track length of the image capturing unit 100h is not limited by the thickness of the electronic device 400. Moreover, the light-folding element configuration of the image capturing unit 100h can be similar to, for example, one of the structures shown in FIG. 34 to FIG. 36, which can be referred to foregoing descriptions corresponding to FIG. 34 to FIG. 36, and the details in this regard will not be provided again. In this embodiment, the electronic device 400 includes multiple image capturing units 100, 100h and 100i, but the present disclosure is not limited to the number and arrangement of image capturing units. When a user captures images of an object, light rays converge in the image capturing unit 100, 100h or 100i to generate images, and the flash module 401 is activated for light supplement. Further, the subsequent processes are performed in a manner similar to the abovementioned embodiment, so the details in this regard will not be provided again.

14TH EMBODIMENT

FIG. 26 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure.

In this embodiment, an electronic device 500 is a smartphone including the image capturing unit 100 disclosed in the 10th embodiment, an image capturing unit 100j, an image capturing unit 100k, an image capturing unit 100m, an image capturing unit 100n, an image capturing unit 100p, an image capturing unit 100q, an image capturing unit 100r, an image capturing unit 100s, a flash module 501, a focus assist module, an image signal processor, a display module and an image software processor (not shown). The image capturing units 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r and 100s are disposed on the same side of the electronic device 500, while the display module is disposed on the opposite side of the electronic device 500. Furthermore, each of the image capturing units 100j, 100k, 100m, 100n, 100p, 100q, 100r and 100s can include the photographing lens assembly of the present disclosure and can have a configuration similar to that of the image capturing unit 100, and the details in this regard will not be provided again.

The image capturing unit 100 is an ultra-wide-angle image capturing unit, the image capturing unit 100j is a telephoto image capturing unit, the image capturing unit 100k is a telephoto image capturing unit, the image capturing unit 100m is a wide-angle image capturing unit, the image capturing unit 100n is a wide-angle image capturing unit, the image capturing unit 100p is an ultra-wide-angle image capturing unit, the image capturing unit 100q is a telephoto image capturing unit, the image capturing unit 100r is a telephoto image capturing unit, and the image capturing unit 100s is a ToF image capturing unit. In this embodiment, the image capturing units 100, 100j, 100k, 100m, 100n, 100p, 100q and 100r have different fields of view, such that the electronic device 500 can have various magnification ratios so as to meet the requirement of optical zoom functionality. Moreover, each of the image capturing units 100j and 100k can be a telephoto image capturing unit having a light-folding element configuration. Moreover, the light-folding element configuration of each of the image capturing unit 100j and 100k can be similar to, for example, one of the structures shown in FIG. 34 to FIG. 36, which can be referred to foregoing descriptions corresponding to FIG. 34 to FIG. 36, and the details in this regard will not be provided again. In addition, the image capturing unit 100s can determine depth information of the imaged object. In this embodiment, the electronic device 500 includes multiple image capturing units 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r and 100s, but the present disclosure is not limited to the number and arrangement of image capturing units. When a user captures images of an object, the light rays converge in the image capturing unit 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r or 100s to generate images, and the flash module 501 is activated for light supplement. Further, the subsequent processes are performed in a manner similar to the abovementioned embodiments, and the details in this regard will not be provided again.

15TH EMBODIMENT

FIG. 27 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure. FIG. 28 is a side view of the electronic device in FIG. 27. FIG. 29 is a top view of the electronic device in FIG. 27.

In this embodiment, an electronic device 600 is a mobile vehicle, such as a car. The electronic device 600 includes a plurality of image capturing units 601, and each of the image capturing units 601 includes, for example, the photographing lens assembly of the present disclosure. The image capturing units 601 can be served as, for example, panoramic view car cameras, dashboard cameras and vehicle backup cameras. The image capturing units 601 can be ultra-wide-angle image capturing units.

As shown in FIG. 27 to FIG. 29, the image capturing units 601 are, for example, disposed at the front side, the rear side, the lateral sides, inner side or on the backmirror of the car to capture peripheral images of the car, which is favorable for obtaining external traffic information so as to achieve an advanced driver-assistance function. In addition, the image software processor may stitch the peripheral images into one panoramic view image for the driver's checking every corner surrounding the car, thereby assisting in parking and driving.

As shown in FIG. 28, the image capturing units 601 are, for example, disposed on the lower portion of the side mirrors for capturing image information of the left and right lanes. As shown in FIG. 29, the image capturing units 601 can also be, for example, disposed on the lower portion of the side mirrors and inside the front and rear windshields for providing external information to the driver, and also providing more viewing angles so as to reduce blind spots, thereby improving driving safety. Please be noted the arrangement of the image capturing units 601 in the drawings is only exemplary, and the number, the positions and the image capturing directions of the image capturing units 601 can be adjusted according to actual requirements.

16TH EMBODIMENT

FIG. 30 is a partial view of an inner side of an electronic device according to the 16th embodiment of the present disclosure.

In this embodiment, an electronic device 700 is a mobile vehicle, such as a car. The electronic device 700 includes an image capturing unit 701, and the image capturing unit 701 includes, for example, the photographing lens assembly of the present disclosure. The image capturing unit 701 is disposed adjacent to the dashboard 702 or center console 703 of the electronic device 700, but the present disclosure is not limited thereto. The image capturing unit 701 can be used as a sensing lens towards the driver for being applied in a driver monitoring system, thereby detecting the driver's sobriety by determining the driver's gaze and blink or checking the driver's yawn and head position through the infrared lens. The image detected by the image capturing unit 701 can refer to FIG. 31, which is a schematic view showing the image captured by an image capturing unit of the electronic device in FIG. 30 when processing its detection function. Therefore, it is favorable for detecting whether the driver is distracted, tired, dozing off or other dangerous driving, thereby sending a signal to the reminder or alarm (not shown) in the electronic device 700 or a management system (not shown) in communication connection with the electronic device 700.

The smartphone, the camera, and the mobile vehicle in several embodiments are only exemplary for showing the image capturing unit of the present disclosure installed in an electronic device, and the present disclosure is not limited thereto. The image capturing unit can be optionally applied to optical systems with a movable focus. Furthermore, the photographing lens assembly of the image capturing unit features good capability in aberration corrections and high image quality, and can be applied to 3D (three-dimensional) image capturing applications, in products such as digital cameras, mobile devices, digital tablets, smart televisions, network surveillance devices, dashboard cameras, vehicle backup cameras, multi-camera devices, image recognition systems, motion sensing input devices, wearable devices and other electronic imaging devices.

The foregoing description, for the purpose of explanation, has been described with reference to specific embodiments. It is to be noted that TABLES 1A-9C show different data of the different embodiments; however, the data of the different embodiments are obtained from experiments. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to the particular use contemplated. The embodiments depicted above and the appended drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.

PHOTOGRAPHING LENS ASSEMBLY, IMAGE CAPTURING UNIT AND ELECTRONIC DEVICE

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