Patent Grant
11921260
This application is a Divisional of U.S. patent application Ser. No. 16/242,228, filed Jan. 8, 2019 and entitled “Display devices and methods for manufacturing the same”, now U.S. Pat. No. 11,018,089, the entirety of which is incorporated by reference herein.
The current development trend of a lens assembly is toward small F-number. Additionally, the lens assembly is developed to have miniaturization and high resolution capability in accordance with different application requirements. However, the known lens assembly can't satisfy such requirements. Therefore, the lens assembly needs a new structure in order to meet the requirements of small F-number, miniaturization, and high resolution at the same time.
The invention provides a lens assembly to solve the above problems. The lens assembly of the invention is provided with characteristics of a smaller F-number, a shortened total lens length, a higher resolution, and still has a good optical performance.
The lens assembly in accordance with an exemplary embodiment of the invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein the first, second, third, fourth, fifth, and sixth lenses are arranged in order from an object side to an image side along an optical axis. The first lens is a meniscus lens with positive refractive power and includes a convex surface facing the object side and a concave surface facing the image side. The second, third, and fourth lenses are with refractive power. The fifth lens is with positive refractive power and includes a convex surface facing the image side. The sixth lens is with negative refractive power and includes a concave surface facing the image side. The lens assembly satisfies: 3<D1/T6<9; wherein D1 is an effective optical diameter of the convex surface of the first lens and T6 is a thickness of the sixth lens along the optical axis.
In another exemplary embodiment, the second lens is a meniscus lens and the third lens is with positive refractive power and includes a convex surface facing the object side.
In yet another exemplary embodiment, the second lens is with negative refractive power and includes a convex surface facing the object side and a concave surface facing the image side.
In another exemplary embodiment, the lens assembly further includes a seventh lens disposed between the fourth lens and the fifth lens, wherein the seventh lens is with negative refractive power, the fourth lens includes a convex surface facing the object side, the fifth lens further includes a concave surface facing the object side, and the sixth lens further includes a convex surface facing the object side.
In yet another exemplary embodiment, the lens assembly satisfies: 1.2<f/D1<2.5; wherein D1 is an effective optical diameter of the convex surface of the first lens and f is an effective focal length of the lens assembly.
In another exemplary embodiment, the lens assembly satisfies: 10 mm<(R11+R12+R52+R62)×((T5+T6)/G5)<29 mm; wherein T5 is a thickness of the fifth lens along the optical axis, T6 is a thickness of the sixth lens along the optical axis, R11 is a radius of curvature of the convex surface of the first lens, R12 is a radius of curvature of the concave surface of the first lens, R52 is a radius of curvature of the convex surface of the fifth lens, R62 is a radius of curvature of the concave surface of the sixth lens, and G5 is an air interval from the convex surface of the fifth lens to an object side surface of the sixth lens along the optical axis.
In yet another exemplary embodiment, the lens assembly satisfies: −5<(f1−f6)/(T5+T6−R62+R52)<−1; −20 mm<f×((f1−f6)/(T5+T6−R62+R52))<−5 mm; wherein f is an effective focal length of the lens assembly, f1 is an effective focal length of the first lens, f6 is an effective focal length of the sixth lens, T5 is a thickness of the fifth lens along the optical axis, T6 is a thickness of the sixth lens along the optical axis, R52 is a radius of curvature of the convex surface of the fifth lens, and R62 is a radius of curvature of the concave surface of the sixth lens.
In another exemplary embodiment, the lens assembly satisfies: −3.5<(f1+f5+f6)/(T5+T6−R62+R52)<−1.5; wherein f1 is an effective focal length of the first lens, f5 is an effective focal length of the fifth lens, f6 is an effective focal length of the sixth lens, T5 is a thickness of the fifth lens along the optical axis, T6 is a thickness of the sixth lens along the optical axis, R52 is a radius of curvature of the convex surface of the fifth lens, and R62 is a radius of curvature of the concave surface of the sixth lens.
In yet another exemplary embodiment, the lens assembly satisfies: −10<F×((f1−f6)/(T5+T6−R62+R52))<−3; wherein F is a F-number of the lens assembly, f1 is an effective focal length of the first lens, f6 is an effective focal length of the sixth lens, T5 is a thickness of the fifth lens along the optical axis, T6 is a thickness of the sixth lens along the optical axis, R52 is a radius of curvature of the convex surface of the fifth lens, and R62 is a radius of curvature of the concave surface of the sixth lens.
In another exemplary embodiment, the lens assembly satisfies: 1.3 mm<(f1−f6)/((T5+T6)/G5)<5 mm; wherein f1 is an effective focal length of the first lens, f6 is an effective focal length of the sixth lens, T5 is a thickness of the fifth lens along the optical axis, T6 is a thickness of the sixth lens along the optical axis, and G5 is an air interval from the convex surface of the fifth lens to an object side surface of the sixth lens along the optical axis.
In yet another exemplary embodiment, the lens assembly satisfies: 10 mm<|AAG×(R21+R22)/(R21−R22)|<20 mm; wherein AAG is a total air interval from the concave surface of the first lens to an object side surface of a lens which is closest to the image side along the optical axis, R21 is a radius of curvature of an object side surface of the second lens, and R22 is a radius of curvature of an image side surface of the second lens.
In another exemplary embodiment, the lens assembly satisfies: −1.8 mm<(R52+R62)×(R31/f1)<0 mm; wherein f1 is an effective focal length of the first lens, R31 is a radius of curvature of the convex surface of the third lens, R52 is a radius of curvature of the convex surface of the fifth lens, and R62 is a radius of curvature of the concave surface of the sixth lens.
In yet another exemplary embodiment, the lens assembly satisfies: 37 mm<|f×(R21+R22)/(R21−R22)|<55 mm; 16<|F×(R21+R22)/(R21−R22)|<25; wherein f is an effective focal length of the lens assembly, F is a F-number of the lens assembly, R21 is a radius of curvature of an object side surface of the second lens, and R22 is a radius of curvature of an image side surface of the second lens.
In another exemplary embodiment, the lens assembly satisfies: 0 mm<|f234|<50 mm; −35 mm<(f1×f6)/(T1+T2+T6)<−6 mm; −3.5<(R11+R12)/(R52−R62)<−1; 0.5<TTL/(R62−R52)<1.9; wherein f234 is an effective focal length of a combination of the second lens, the third lens, and the fourth lens, f1 is an effective focal length of the first lens, f6 is an effective focal length of the sixth lens, T1 is a thickness of the first lens along the optical axis, T2 is a thickness of the second lens along the optical axis, T6 is a thickness of the sixth lens along the optical axis, R11 is a radius of curvature of the convex surface of the first lens, R12 is a radius of curvature of the concave surface of the first lens, R52 is a radius of curvature of the convex surface of the fifth lens, R62 is a radius of curvature of the concave surface of the sixth lens, and TTL is an interval from the convex surface of the first lens to an image plane along the optical axis.
In yet another exemplary embodiment, the second lens is a meniscus lens with negative refractive power and includes a convex surface facing the object side and a concave surface facing the image side, the third lens is a meniscus lens with positive refractive power and includes a convex surface facing the object side and a concave surface facing the image side, the lens assembly further includes a seventh lens disposed between the sixth lens and the image side, wherein the seventh lens is a meniscus lens with negative refractive power and includes a convex surface facing the object side and a concave surface facing the image side.
In another exemplary embodiment, the fourth lens is a meniscus lens with negative refractive power and includes a convex surface facing the object side and a concave surface facing the image side, the fifth lens further includes a concave surface facing the object side, and the sixth lens further includes a concave surface facing the object side.
In yet another exemplary embodiment, the fourth lens is a meniscus lens with positive refractive power and includes a concave surface facing the object side and a convex surface facing the image side, the fifth lens further includes a concave surface facing the object side, and the sixth lens further includes a convex surface facing the object side.
In another exemplary embodiment, the lens assembly satisfies: 4.5 mm<TTL/F<6 mm; 0<D1/TTL<1; wherein TTL is an interval from the convex surface of the first lens to an image plane along the optical axis, F is a F-number of the lens assembly, and D1 is an effective optical diameter of the convex surface of the first lens.
In yet another exemplary embodiment, the lens assembly satisfies: 2<(R71−R12)/T7<6; 8<f1/T7<13; 2<f3/f<3.5; wherein f is an effective focal length of the lens assembly, f1 is an effective focal length of the first lens, f3 is an effective focal length of the third lens, T7 is a thickness of the seventh lens along the optical axis, R12 is a radius of curvature of the concave surface of the first lens, and R71 is a radius of curvature of the convex surface of the seventh lens.
In another exemplary embodiment, the lens assembly satisfies: −20 mm<f×((f1−f6)/(T5+T6−R62+R52))<−5 mm; 10 mm<|AAG×(R21+R22)/(R21−R22)|<20 mm; 1.3 mm<(f1−f6)/((T5+T6)/G5)<5 mm; −5<(f1−f6)/(T5+T6−R62+R52)<−1; wherein f is an effective focal length of the lens assembly, f1 is an effective focal length of the first lens, f6 is an effective focal length of the sixth lens, T5 is a thickness of the fifth lens along the optical axis, T6 is a thickness of the sixth lens along the optical axis, AAG is a total air interval from the concave surface of the first lens to an object side surface of a lens which is closest to the image side along the optical axis, G5 is an air interval from the convex surface of the fifth lens to an object side surface of the sixth lens along the optical axis, R21 is a radius of curvature of the convex surface of the second lens, R22 is a radius of curvature of the concave surface of the second lens, R52 is a radius of curvature of the convex surface of the fifth lens, and R62 is a radius of curvature of the concave surface of the sixth lens.
A detailed description is given in the following embodiments with reference to the accompanying drawings.
The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
The following description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.
Referring to
The first lens L11 is a meniscus lens with positive refractive power, wherein the object side surface S12 is a convex surface, the image side surface S13 is a concave surface, and both of the object side surface S12 and image side surface S13 are aspheric surfaces.
The second lens L12 is a meniscus lens with negative refractive power, wherein the object side surface S14 is a convex surface, the image side surface S15 is a concave surface, and both of the object side surface S14 and image side surface S15 are aspheric surfaces.
The third lens L13 is a meniscus lens with positive refractive power, wherein the object side surface S16 is a convex surface, the image side surface S17 is a concave surface, and both of the object side surface S16 and image side surface S17 are aspheric surfaces.
The fourth lens L14 is a meniscus lens with positive refractive power, wherein the object side surface S18 is a convex surface, the image side surface S19 is a concave surface, and both of the object side surface S18 and image side surface S19 are aspheric surfaces.
The fifth lens L15 is a meniscus lens with positive refractive power, wherein the object side surface S110 is a concave surface, the image side surface S111 is a convex surface, and both of the object side surface S110 and image side surface S111 are aspheric surfaces.
The sixth lens L16 is a meniscus lens with negative refractive power, wherein the object side surface S112 is a convex surface, the image side surface S113 is a concave surface, and both of the object side surface S112 and image side surface S113 are aspheric surfaces.
Both of the object side surface S114 and image side surface S115 of the optical filter OF1 are plane surfaces.
In order to maintain excellent optical performance of the lens assembly in accordance with the first embodiment of the invention, the lens assembly 1 satisfies any of the following conditions:
3<D11/T16<9 (1)
−20 mm<f1×((f11−f16)/(T15+T16−R162+R152))<−5 mm (2)
37 mm<|f1×(R121+R122)/(R121−R122)|<55 mm (3)
10 mm<|AAG1×(R121+R122)/(R121−R122)|<20 mm (4)
16<|F1×(R121+R122)/(R121−R122)|<25 (5)
−1.8 mm<(R152+R162)×(R131/f11)<0 mm (6)
0 mm<|f1234|<50 mm (7)
1.2<f1/D11<2.5 (8)
−35 mm<(f11×f16)/(T11+T12+T16)<−6 mm (9)
1.3 mm<(f11−f16)/((T15+T16)/G15)<5 mm (10)
10 mm<(R111+R112+R152+R162)×((T15+T16)/G15)<29 mm (11)
−3.5<(R111+R112)/(R152−R162)<−1 (12)
0.5<TTL1/(R162−R152)<1.9 (13)
−3.5<(f11+f15+f16)/(T15+T16−R162+R152)<−1.5 (14)
−5<(f11−f6)/(T15+T16−R162+R152)<−1 (15)
−10<F1×((f11−f16)/(T15+T16−R162+R152))<−3 (16)
wherein f11 is an effective focal length of the first lens L11, f15 is an effective focal length of the fifth lens L15, f16 is an effective focal length of the sixth lens L16, f1234 is an effective focal length of an combination of the second lens L12, the third lens L13, and the fourth lens L14, f1 is an effective focal length of the lens assembly 1, R111 is a radius of curvature of the object side surface S12 of the first lens L11, R112 is a radius of curvature of the image side surface S13 of the first lens L11, R121 is a radius of curvature of the object side surface S14 of the second lens L12, R122 is a radius of curvature of the image side surface S15 of the second lens L12, R131 is a radius of curvature of the object side surface S16 of the third lens L13, R152 is a radius of curvature of the image side surface S111 of the fifth lens L15, R162 is a radius of curvature of the image side surface S113 of the sixth lens L16, D11 is an effective optical diameter of the object side surface S12 of the first lens L11, AAG1 is a total air interval from the image side surface S13 of the first lens L11 to the object side surface S112 of the lens which is closest to the image side along the optical axis OA1, F1 is a F-number of the lens assembly 1, T11 is a thickness of the first lens L11 along the optical axis OA1, T12 is a thickness of the second lens L12 along the optical axis OA1, T15 is a thickness of the fifth lens L15 along the optical axis OA1, T16 is a thickness of the sixth lens L16 along the optical axis OA1, G15 is an air interval from the image side surface S111 of the fifth lens L15 to the object side surface S112 of the sixth lens L16 along the optical axis OA1, and TTL is an interval from the object side surface S12 of the first lens L11 to the image plane IMA1 along the optical axis OA1.
By the above design of the lenses, stop ST1, and satisfies any one of the conditions (1)-(16), the lens assembly 1 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
In order to achieve the above purposes and effectively enhance the optical performance, the lens assembly 1 in accordance with the first embodiment of the invention is provided with the optical specifications shown in Table 1, which include the effective focal length, F-number, total lens length, field of view, radius of curvature of each lens surface, thickness between adjacent surface, refractive index of each lens, and Abbe number of each lens.
The aspheric surface sag z of each lens in table 1 can be calculated by the following formula:
z=ch2/{1+[1−(k+1)c2h2]1/2}+Ah4+Bh6+Ch8+Dh10+Eh12+Fh14+Gh16+Hh18+Ih20+Jh3+Kh5+Lh7+Mh9
where c is curvature, h is the vertical distance from the lens surface to the optical axis, k is conic constant and A, B, C, D, E, F, G, H, I, J, K, L and M are aspheric coefficients.
In the first embodiment, the conic constant k, the aspheric coefficients A, B, C, D, E, F, G of each surface are shown in Table 2, and the other aspheric coefficients H, I, J, K, L, M are equal to 0.
Table 3 shows the parameters and condition values for conditions (1)-(16) in accordance with the first embodiment of the invention. As can be seen from Table 3, the lens assembly 1 of the first embodiment satisfies the conditions (1)-(16).
By the above arrangements of the lenses and stop ST1, the lens assembly 1 of the first embodiment can meet the requirements of optical performance as seen in
It can be seen from
It can be seen from
It can be seen from
It is obvious that the field curvature and the distortion of the lens assembly 1 of the first embodiment can be corrected effectively, and the resolution of the lens assembly 1 of the first embodiment can meet the requirement. Therefore, the lens assembly 1 of the first embodiment is capable of good optical performance.
Referring to
The first lens L21 is a meniscus lens with positive refractive power, wherein the object side surface S22 is a convex surface, the image side surface S23 is a concave surface, and both of the object side surface S22 and image side surface S23 are aspheric surfaces.
The second lens L22 is a meniscus lens with negative refractive power, wherein the object side surface S24 is a convex surface, the image side surface S25 is a concave surface, and both of the object side surface S24 and image side surface S25 are aspheric surfaces.
The third lens L23 is a biconvex lens with positive refractive power, wherein the object side surface S26 is a convex surface, the image side surface S27 is a convex surface, and both of the object side surface S26 and image side surface S27 are aspheric surfaces.
The fourth lens L24 is a meniscus lens with negative refractive power, wherein the object side surface S28 is a concave surface, the image side surface S29 is a convex surface, and both of the object side surface S28 and image side surface S29 are aspheric surfaces.
The fifth lens L25 is a biconvex lens with positive refractive power, wherein the object side surface S210 is a convex surface, the image side surface S211 is a convex surface, and both of the object side surface S210 and image side surface S211 are aspheric surfaces.
The sixth lens L26 is a biconcave lens with negative refractive power, wherein the object side surface S212 is a concave surface, the image side surface S213 is a concave surface, and both of the object side surface S212 and image side surface S213 are aspheric surfaces.
Both of the object side surface S214 and image side surface S215 of the optical filter OF2 are plane surfaces.
In order to maintain excellent optical performance of the lens assembly in accordance with the second embodiment of the invention, the lens assembly 2 satisfies any one of the conditions (1)-(16), wherein the definition for all of the parameters in the second embodiment is the same as that of in the first embodiment, and is not described here again.
By the above design of the lenses, stop ST2, and satisfies any one of the conditions (1)-(16), the lens assembly 2 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
In order to achieve the above purposes and effectively enhance the optical performance, the lens assembly 2 in accordance with the second embodiment of the invention is provided with the optical specifications shown in Table 4, which include the effective focal length, F-number, total lens length, field of view, radius of curvature of each lens surface, thickness between adjacent surface, refractive index of each lens, and Abbe number of each lens.
The definition of aspheric surface sag z of each lens in table 4 is the same as that of in Table 1.
In the second embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each surface are shown in Table 5, and the other aspheric coefficients H, I, J, K, L, M are equal to 0.
Table 6 shows the parameters and condition values for conditions (1)-(16) in accordance with the second embodiment of the invention. As can be seen from Table 6, the lens assembly 2 of the second embodiment satisfies the conditions (1)-(16).
By the above arrangements of the lenses and stop ST2, the lens assembly 2 of the second embodiment can meet the requirements of optical performance as seen in
It can be seen from
It can be seen from
It can be seen from
It is obvious that the field curvature and the distortion of the lens assembly 2 of the second embodiment can be corrected effectively, and the resolution of the lens assembly 2 of the second embodiment can meet the requirement. Therefore, the lens assembly 2 of the second embodiment is capable of good optical performance
Referring to
The first lens L31 is a meniscus lens with positive refractive power, wherein the object side surface S32 is a convex surface, the image side surface S33 is a concave surface, and both of the object side surface S32 and image side surface S33 are aspheric surfaces.
The second lens L32 is a meniscus lens with negative refractive power, wherein the object side surface S34 is a convex surface, the image side surface S35 is a concave surface, and both of the object side surface S34 and image side surface S35 are aspheric surfaces.
The third lens L33 is a meniscus lens with positive refractive power, wherein the object side surface S36 is a convex surface, the image side surface S37 is a concave surface, and both of the object side surface S36 and image side surface S37 are aspheric surfaces.
The fourth lens L34 is a biconvex lens with positive refractive power, wherein the object side surface S38 is a convex surface, the image side surface S39 is a convex surface, and both of the object side surface S38 and image side surface S39 are aspheric surfaces.
The seventh lens L37 is a meniscus lens with negative refractive power, wherein the object side surface S310 is a convex surface, the image side surface S311 is a concave surface, and both of the object side surface S310 and image side surface S311 are aspheric surfaces.
The fifth lens L35 is a meniscus lens with positive refractive power, wherein the object side surface S312 is a concave surface, the image side surface S313 is a convex surface, and both of the object side surface S312 and image side surface S313 are aspheric surfaces.
The sixth lens L36 is a meniscus lens with negative refractive power, wherein the object side surface S314 is a convex surface, the image side surface S315 is a concave surface, and both of the object side surface S314 and image side surface S315 are aspheric surfaces.
Both of the object side surface S316 and image side surface S317 of the optical filter OF3 are plane surfaces.
In order to maintain excellent optical performance of the lens assembly in accordance with the third embodiment of the invention, the lens assembly 3 satisfies any one of the conditions (1)-(16), wherein the definition for all of the parameters in the third embodiment is the same as that of in the first embodiment, and is not described here again.
By the above design of the lenses, stop ST3, and satisfies any one of the conditions (1)-(16), the lens assembly 3 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
In order to achieve the above purposes and effectively enhance the optical performance, the lens assembly 3 in accordance with the third embodiment of the invention is provided with the optical specifications shown in Table 7, which include the effective focal length, F-number, total lens length, field of view, radius of curvature of each lens surface, thickness between adjacent surface, refractive index of each lens, and Abbe number of each lens.
The definition of aspheric surface sag z of each lens in table 7 is the same as that of in Table 1.
In the third embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each surface are shown in Table 8, and the other aspheric coefficients H, I, J, K, L, M are equal to 0.
Table 9 shows the parameters and condition values for conditions (1)-(16) in accordance with the third embodiment of the invention. As can be seen from Table 9, the lens assembly 3 of the third embodiment satisfies the conditions (1)-(16).
By the above arrangements of the lenses and stop ST3, the lens assembly 3 of the third embodiment can meet the requirements of optical performance as seen in
It can be seen from
It can be seen from
It can be seen from
It is obvious that the field curvature and the distortion of the lens assembly 3 of the third embodiment can be corrected effectively, and the resolution of the lens assembly 3 of the third embodiment can meet the requirement. Therefore, the lens assembly 3 of the third embodiment is capable of good optical performance.
Referring to
The first lens L41 is a meniscus lens with positive refractive power, wherein the object side surface S41 is a convex surface, the image side surface S42 is a concave surface, and both of the object side surface S41 and image side surface S42 are aspheric surfaces.
The second lens L42 is a meniscus lens with positive refractive power, wherein the object side surface S44 is a convex surface, the image side surface S45 is a concave surface, and both of the object side surface S44 and image side surface S45 are aspheric surfaces.
The third lens L43 is a biconvex lens with positive refractive power, wherein the object side surface S46 is a convex surface, the image side surface S47 is a convex surface, and both of the object side surface S46 and image side surface S47 are aspheric surfaces.
The fourth lens L44 is a meniscus lens with negative refractive power, wherein the object side surface S48 is a convex surface, the image side surface S49 is a concave surface, and both of the object side surface S48 and image side surface S49 are aspheric surfaces.
The seventh lens L47 is a meniscus lens with negative refractive power, wherein the object side surface S410 is a concave surface, the image side surface S411 is a convex surface, and both of the object side surface S410 and image side surface S411 are aspheric surfaces.
The fifth lens L45 is a meniscus lens with positive refractive power, wherein the object side surface S412 is a concave surface, the image side surface S413 is a convex surface, and both of the object side surface S412 and image side surface S413 are aspheric surfaces.
The sixth lens L46 is a meniscus lens with negative refractive power, wherein the object side surface S414 is a convex surface, the image side surface S415 is a concave surface, and both of the object side surface S414 and image side surface S415 are aspheric surfaces.
Both of the object side surface S416 and image side surface S417 of the optical filter OF4 are plane surfaces.
In order to maintain excellent optical performance of the lens assembly in accordance with the fourth embodiment of the invention, the lens assembly 4 satisfies any one of the conditions (1)-(16), wherein the definition for all of the parameters in the fourth embodiment is the same as that of in the first embodiment, and is not described here again.
By the above design of the lenses, stop ST4, and satisfies any one of the conditions (1)-(16), the lens assembly 4 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
In order to achieve the above purposes and effectively enhance the optical performance, the lens assembly 4 in accordance with the fourth embodiment of the invention is provided with the optical specifications shown in Table 10, which include the effective focal length, F-number, total lens length, field of view, radius of curvature of each lens surface, thickness between adjacent surface, refractive index of each lens, and Abbe number of each lens.
The definition of aspheric surface sag z of each lens in table 10 is the same as that of in Table 1.
In the fourth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each surface are shown in Table 11, and the other aspheric coefficients H, I, J, K, L, M are equal to 0.
Table 12 shows the parameters and condition values for conditions (1)-(16) in accordance with the fourth embodiment of the invention. As can be seen from Table 12, the lens assembly 4 of the fourth embodiment satisfies the conditions (1)-(16).
By the above arrangements of the lenses and stop ST4, the lens assembly 4 of the fourth embodiment can meet the requirements of optical performance as seen in
It can be seen from
It can be seen from
It can be seen from
It is obvious that the field curvature and the distortion of the lens assembly 4 of the fourth embodiment can be corrected effectively, and the resolution of the lens assembly 4 of the fourth embodiment can meet the requirement. Therefore, the lens assembly 4 of the fourth embodiment is capable of good optical performance.
Referring to
The first lens L51 is a meniscus lens with positive refractive power, wherein the object side surface S52 is a convex surface, the image side surface S53 is a concave surface, and both of the object side surface S52 and image side surface S53 are aspheric surfaces.
The second lens L52 is a meniscus lens with negative refractive power, wherein the object side surface S54 is a convex surface, the image side surface S55 is a concave surface, and both of the object side surface S54 and image side surface S55 are aspheric surfaces.
The third lens L53 is a biconvex lens with positive refractive power, wherein the object side surface S56 is a convex surface, the image side surface S57 is a convex surface, and both of the object side surface S56 and image side surface S57 are aspheric surfaces.
The fourth lens L54 is a biconcave lens with negative refractive power, wherein the object side surface S58 is a concave surface, the image side surface S59 is a concave surface, and both of the object side surface S58 and image side surface S59 are aspheric surfaces.
The fifth lens L55 is a meniscus lens with positive refractive power, wherein the object side surface S510 is a concave surface, the image side surface S511 is a convex surface, and both of the object side surface S510 and image side surface S511 are aspheric surfaces.
The sixth lens L56 is a biconcave lens with negative refractive power, wherein the object side surface S512 is a concave surface, the image side surface S513 is a concave surface, and both of the object side surface S512 and image side surface S513 are aspheric surfaces.
Both of the object side surface S514 and image side surface S515 of the optical filter OF5 are plane surfaces.
In order to maintain excellent optical performance of the lens assembly in accordance with the fifth embodiment of the invention, the lens assembly 5 satisfies any one of the conditions (1)-(5) and (7)-(16), wherein the definition for all of the parameters in the fifth embodiment is the same as that of in the first embodiment, and is not described here again.
By the above design of the lenses, stop ST5, and satisfies any one of the conditions (1)-(5) and (7)-(16), the lens assembly 5 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
In order to achieve the above purposes and effectively enhance the optical performance, the lens assembly 5 in accordance with the fifth embodiment of the invention is provided with the optical specifications shown in Table 13, which include the effective focal length, F-number, total lens length, field of view, radius of curvature of each lens surface, thickness between adjacent surface, refractive index of each lens, and Abbe number of each lens.
The definition of aspheric surface sag z of each lens in table 13 is the same as that of in Table 1.
In the fifth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G, J, K, L of each surface are shown in Table 14, and the other aspheric coefficients H, I, M are equal to 0.
Table 15 shows the parameters and condition values for conditions (1)-(5) and (7)-(16) in accordance with the fifth embodiment of the invention. As can be seen from Table 15, the lens assembly 5 of the fifth embodiment satisfies the conditions (1)-(5) and (7)-(16).
By the above arrangements of the lenses and stop ST5, the lens assembly 5 of the fifth embodiment can meet the requirements of optical performance as seen in
It can be seen from
It can be seen from
It can be seen from
It is obvious that the field curvature and the distortion of the lens assembly 5 of the fifth embodiment can be corrected effectively, and the resolution of the lens assembly 5 of the fifth embodiment can meet the requirement. Therefore, the lens assembly 5 of the fifth embodiment is capable of good optical performance.
Referring to
The first lens L61 is a meniscus lens with positive refractive power, wherein the object side surface S62 is a convex surface, the image side surface S63 is a concave surface, and both of the object side surface S62 and image side surface S63 are aspheric surfaces.
The second lens L62 is a meniscus lens with positive refractive power, wherein the object side surface S64 is a concave surface, the image side surface S65 is a convex surface, and both of the object side surface S64 and image side surface S65 are aspheric surfaces.
The third lens L63 is a meniscus lens with negative refractive power, wherein the object side surface S66 is a concave surface, the image side surface S67 is a convex surface, and both of the object side surface S66 and image side surface S67 are aspheric surfaces.
The fourth lens L64 is a meniscus lens with positive refractive power, wherein the object side surface S68 is a concave surface, the image side surface S69 is a convex surface, and both of the object side surface S68 and image side surface S69 are aspheric surfaces.
The fifth lens L65 is a meniscus lens with positive refractive power, wherein the object side surface S610 is a concave surface, the image side surface S611 is a convex surface, and both of the object side surface S610 and image side surface S611 are aspheric surfaces.
The sixth lens L66 is a meniscus lens with negative refractive power, wherein the object side surface S612 is a convex surface, the image side surface S613 is a concave surface, and both of the object side surface S612 and image side surface S613 are aspheric surfaces.
Both of the object side surface S614 and image side surface S615 of the optical filter OF6 are plane surfaces.
In order to maintain excellent optical performance of the lens assembly in accordance with the sixth embodiment of the invention, the lens assembly 6 satisfies any one of the conditions (1)-(2) and (7)-(16), wherein the definition for all of the parameters in the sixth embodiment is the same as that of in the first embodiment, and is not described here again.
By the above design of the lenses, stop ST6, and satisfies any one of the conditions (1)-(2) and (7)-(16), the lens assembly 6 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
In order to achieve the above purposes and effectively enhance the optical performance, the lens assembly 6 in accordance with the sixth embodiment of the invention is provided with the optical specifications shown in Table 16, which include the effective focal length, F-number, total lens length, field of view, radius of curvature of each lens surface, thickness between adjacent surface, refractive index of each lens, and Abbe number of each lens.
The definition of aspheric surface sag z of each lens in table 16 is the same as that of in Table 1.
In the sixth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G of each surface are shown in Table 17, and the other aspheric coefficients H, I, J, K, L, M are equal to 0.
Table 18 shows the parameters and condition values for conditions (1)-(2) and (7)-(16) in accordance with the sixth embodiment of the invention. As can be seen from Table 18, the lens assembly 6 of the sixth embodiment satisfies the conditions (1)-(2) and (7)-(16).
By the above arrangements of the lenses and stop ST6, the lens assembly 6 of the sixth embodiment can meet the requirements of optical performance as seen in
It can be seen from
It can be seen from
It can be seen from
It is obvious that the field curvature and the distortion of the lens assembly 6 of the sixth embodiment can be corrected effectively, and the resolution of the lens assembly 6 of the sixth embodiment can meet the requirement. Therefore, the lens assembly 6 of the sixth embodiment is capable of good optical performance.
Referring to Table 19 and Table 20, Table 19 provides optical specifications in accordance with a seventh embodiment of the invention and Table 20 provides aspheric coefficients of each surface in Table 19.
The figure which depicts the lens layout diagram of the lens assembly in accordance with the seventh embodiment of the invention approximates to the figure which depicts the lens layout diagram of the lens assembly in accordance with the fifth embodiment of the invention, thus the figure which depicts the lens layout diagram of the lens assembly in accordance with the seventh embodiment of the invention is omitted.
The definition of aspheric surface sag z of each lens in table 19 is the same as that of in Table 1.
In the seventh embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G, J, K, L, M of each surface are shown in Table 20, and the other aspheric coefficients H, I are equal to 0.
In order to maintain excellent optical performance of the lens assembly in accordance with the seventh embodiment of the invention, the lens assembly 7 satisfies any one of the conditions (1)-(5) and (7)-(16), wherein the definition for all of the parameters in the seventh embodiment is the same as that of in the first embodiment, and is not described here again.
By the above design of the lenses, stop ST7, and satisfies any one of the conditions (1)-(5) and (7)-(16), the lens assembly 7 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
Table 21 shows the parameters and condition values for conditions (1)-(5) and (7)-(16) in accordance with the seventh embodiment of the invention. As can be seen from Table 21, the lens assembly 7 of the seventh embodiment satisfies the conditions (1)-(5) and (7)-(16).
The above field curvature (figure is omitted) and distortion (figure is omitted) for the seventh embodiment of the lens assembly can be corrected effectively, and the resolution for the seventh embodiment of the lens assembly can meet the requirement. Therefore, the lens assembly of the seventh embodiment is capable of good optical performance.
Referring to Table 22 and Table 23, Table 22 provides optical specifications in accordance with an eighth embodiment of the invention and Table 23 provides aspheric coefficients of each surface in Table 22.
The refractive power of each lens for the lens assembly in accordance with the eighth embodiment of the invention is the same as the refractive power of each lens for the lens assembly in accordance with the first embodiment of the invention, thus the figure which depicts the lens layout diagram of the lens assembly in accordance with the eighth embodiment of the invention is omitted. The difference between the eighth embodiment of the lens assembly and the first embodiment of the lens assembly is that the image side surface of the third lens is a convex surface and the object side surface of the sixth lens is a concave surface for the eighth embodiment of the lens assembly, however, the image side surface of the third lens is a concave surface and the object side surface of the sixth lens is a convex surface for the first embodiment of the lens assembly.
The definition of aspheric surface sag z of each lens in table 22 is the same as that of in Table 1.
In the eighth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G, J, K of each surface are shown in Table 23, and the other aspheric coefficients H, I, L, M are equal to 0.
In order to maintain excellent optical performance of the lens assembly in accordance with the eighth embodiment of the invention, the lens assembly 8 satisfies any one of the conditions (1)-(2) and (7)-(16), wherein the definition for all of the parameters in the eighth embodiment is the same as that of in the first embodiment, and is not described here again.
By the above design of the lenses, stop ST8, and satisfies any one of the conditions (1)-(2) and (7)-(16), the lens assembly 8 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
Table 24 shows the parameters and condition values for conditions (1)-(2) and (7)-(16) in accordance with the eighth embodiment of the invention. As can be seen from Table 24, the lens assembly 8 of the eighth embodiment satisfies the conditions (1)-(2) and (7)-(16).
The above field curvature (figure is omitted) and distortion (figure is omitted) for the eighth embodiment of the lens assembly can be corrected effectively, and the resolution for the eighth embodiment of the lens assembly can meet the requirement. Therefore, the lens assembly of the eighth embodiment is capable of good optical performance.
Referring to
The first lens L91 is a meniscus lens with positive refractive power, wherein the object side surface S92 is a convex surface, the image side surface S93 is a concave surface, and both of the object side surface S92 and image side surface S93 are aspheric surfaces.
The second lens L92 is a meniscus lens with negative refractive power, wherein the object side surface S94 is a convex surface, the image side surface S95 is a concave surface, and both of the object side surface S94 and image side surface S95 are aspheric surfaces.
The third lens L93 is a meniscus lens with positive refractive power, wherein the object side surface S96 is a convex surface, the image side surface S97 is a concave surface, and both of the object side surface S96 and image side surface S97 are aspheric surfaces.
The fourth lens L94 is a meniscus lens with negative refractive power, wherein the object side surface S98 is a convex surface, the image side surface S99 is a concave surface, and both of the object side surface S98 and image side surface S99 are aspheric surfaces.
The fifth lens L95 is a meniscus lens with positive refractive power, wherein the object side surface S910 is a concave surface, the image side surface S911 is a convex surface, and both of the object side surface S910 and image side surface S911 are aspheric surfaces.
The sixth lens L96 is a biconcave lens with negative refractive power, wherein the object side surface S912 is a concave surface, the image side surface S913 is a concave surface, and both of the object side surface S912 and image side surface S913 are aspheric surfaces and at least one of which includes at least one inflection point. About two-thirds of the object side surface appearance within the effective optical diameter range is close to plane and the object side surface appearance is concave between two-thirds of the effective optical diameter of the object side surface and the periphery of the object side surface. About one-half of the image side surface appearance within the effective optical diameter range is close to plane and the image side surface appearance is convex between one-half of the effective optical diameter of the image side surface and the periphery of the image side surface. The object side surface away from the optical axis bends toward to the object side and that near the optical axis approximates to plane almost without bending. In terms of thickness, the thickness variation is very small near the optical axis and that is larger at the periphery of the lens, resulting in a thinner thickness near the optical axis and a thicker thickness away from the optical axis. In this way, it is beneficial to shorten total lens length of the lens assembly, achieve miniaturization of the lens assembly, and reduce chromatic aberration and aberration.
The seventh lens L97 is a meniscus lens with negative refractive power, wherein the object side surface S914 is a convex surface, the image side surface S915 is a concave surface, and both of the object side surface S914 and image side surface S915 are aspheric surfaces.
Both of the object side surface S916 and image side surface S917 of the optical filter OF9 are plane surfaces.
The third lens L93 and the fifth lens L95 have positive refractive power at the same time, which can greatly shorten the total lens length of the lens assembly 9.
In order to maintain excellent optical performance of the lens assembly in accordance with the ninth embodiment of the invention, the lens assembly 9 satisfies any of the conditions (1)-(2), (4), (10), and (15), wherein the definition for all of the parameters in the ninth embodiment is the same as that of in the first embodiment, and is not described here again. The lens assembly 9 further satisfies any of the following conditions:
1<R971/R912<3 (17)
0.6<f9/(R971−R972)<1.5 (18)
2<(R971−R912)/T97<6 (19)
4.5 mm<TTL9/F9<6 mm (20)
8<f91/T97<13 (21)
2<f93/f9<3.5 (22)
0<D91/TTL9<1 (23)
1.1<f9/D91<2.6 (24)
wherein f93 is an effective focal length of the third lens L93, R971 is a radius of curvature of the object side surface S914 of the seventh lens L97, R972 is a radius of curvature of the image side surface S915 of the seventh lens L97, T97 is a thickness of the seventh lens L97 along the optical axis OA9.
By the above design of the lenses, stop ST9, and satisfies any one of the conditions (1)-(2), (4), (10), (15), and (17)-(24), the lens assembly 9 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
In order to achieve the above purposes and effectively enhance the optical performance, the lens assembly 9 in accordance with the ninth embodiment of the invention is provided with the optical specifications shown in Table 25, which include the effective focal length, F-number, total lens length, field of view, radius of curvature of each lens surface, thickness between adjacent surface, refractive index of each lens, and Abbe number of each lens.
The definition of aspheric surface sag z of each lens in table 25 is the same as that of in Table 1.
In the ninth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G, H, I, K, L, M of each surface are shown in Table 26, and the other aspheric coefficient J is equal to 0.
Table 27 shows the parameters and condition values for conditions (1)-(2), (4), (10), (15), and (17)-(24) in accordance with the ninth embodiment of the invention. As can be seen from Table 27, the lens assembly 9 of the ninth embodiment satisfies the conditions (1)-(2), (4), (10), (15), and (17)-(24).
By the above arrangements of the lenses and stop ST9, the lens assembly 9 of the ninth embodiment can meet the requirements of optical performance as seen in
It can be seen from
It can be seen from
It can be seen from
It is obvious that the field curvature and the distortion of the lens assembly 9 of the ninth embodiment can be corrected effectively, and the resolution of the lens assembly 9 of the ninth embodiment can meet the requirement. Therefore, the lens assembly 9 of the ninth embodiment is capable of good optical performance.
Referring to
The first lens L101 is a meniscus lens with positive refractive power, wherein the object side surface S102 is a convex surface, the image side surface S103 is a concave surface, and both of the object side surface S102 and image side surface S103 are aspheric surfaces.
The second lens L102 is a meniscus lens with negative refractive power, wherein the object side surface S104 is a convex surface, the image side surface S105 is a concave surface, and both of the object side surface S104 and image side surface S105 are aspheric surfaces.
The third lens L103 is a meniscus lens with positive refractive power, wherein the object side surface S106 is a convex surface, the image side surface S107 is a concave surface, and both of the object side surface S106 and image side surface S107 are aspheric surfaces.
The fourth lens L104 is a meniscus lens with positive refractive power, wherein the object side surface S108 is a concave surface, the image side surface S109 is a convex surface, and both of the object side surface S108 and image side surface S109 are aspheric surfaces.
The fifth lens L105 is a meniscus lens with positive refractive power, wherein the object side surface S1010 is a concave surface, the image side surface S1011 is a convex surface, and both of the object side surface S1010 and image side surface S1011 are aspheric surfaces.
The sixth lens L106 is a meniscus lens with negative refractive power, wherein the object side surface S1012 is a convex surface, the image side surface S1013 is a concave surface, and both of the object side surface S1012 and image side surface S1013 are aspheric surfaces and at least one of which includes at least one inflection point. About two-thirds of the object side surface appearance within the effective optical diameter range is close to plane and the object side surface appearance is concave between two-thirds of the effective optical diameter of the object side surface and the periphery of the object side surface. About one-half of the image side surface appearance within the effective optical diameter range is close to plane and the image side surface appearance is convex between one-half of the effective optical diameter of the image side surface and the periphery of the image side surface. The object side surface away from the optical axis bends toward to the object side and that near the optical axis approximates to plane almost without bending. In terms of thickness, the thickness variation is very small near the optical axis and that is larger at the periphery of the lens, resulting in a thinner thickness near the optical axis and a thicker thickness away from the optical axis. In this way, it is beneficial to shorten total lens length of the lens assembly, achieve miniaturization of the lens assembly, and reduce chromatic aberration and aberrations.
The seventh lens L107 is a meniscus lens with negative refractive power, wherein the object side surface S1014 is a convex surface, the image side surface S1015 is a concave surface, and both of the object side surface S1014 and image side surface S1015 are aspheric surfaces.
Both of the object side surface S1016 and image side surface S1017 of the optical filter OF10 are plane surfaces.
The third lens L103 and the fifth lens L105 have positive refractive power at the same time, which can greatly shorten the total lens length of the lens assembly 10.
In order to maintain excellent optical performance of the lens assembly in accordance with the tenth embodiment of the invention, the lens assembly 10 satisfies any one of the conditions (1)-(2), (4), (10), (15), and (17)-(24), wherein the definition for all of the parameters in the tenth embodiment is the same as that of in the ninth embodiment, and is not described here again.
By the above design of the lenses, stop ST10, and satisfies any one of the conditions (1)-(2), (4), (10), (15), and (17)-(24), the lens assembly 10 is provided with an effective shortened total lens length, an effective decreased F-number, an effective decreased weight, an effective increased resolution, an effective corrected chromatic aberration, and an effective corrected aberration.
In order to achieve the above purposes and effectively enhance the optical performance, the lens assembly 10 in accordance with the tenth embodiment of the invention is provided with the optical specifications shown in Table 28, which include the effective focal length, F-number, total lens length, field of view, radius of curvature of each lens surface, thickness between adjacent surface, refractive index of each lens, and Abbe number of each lens.
The definition of aspheric surface sag z of each lens in table 28 is the same as that of in Table 1.
In the tenth embodiment, the conic constant k and the aspheric coefficients A, B, C, D, E, F, G, H, I, K, L, M of each surface are shown in Table 29, and the other aspheric coefficient J is equal to 0.
Table 30 shows the parameters and condition values for conditions (1)-(2), (4), (10), (15), and (17)-(24) in accordance with the tenth embodiment of the invention. As can be seen from Table 30, the lens assembly 10 of the tenth embodiment satisfies the conditions (1)-(2), (4), (10), (15), and (17)-(24).
By the above arrangements of the lenses and stop ST10, the lens assembly 10 of the tenth embodiment can meet the requirements of optical performance as seen in
It can be seen from
It can be seen from
It can be seen from
It is obvious that the field curvature and the distortion of the lens assembly 10 of the tenth embodiment can be corrected effectively, and the resolution of the lens assembly 10 of the tenth embodiment can meet the requirement. Therefore, the lens assembly 10 of the tenth embodiment is capable of good optical performance.
While the invention has been described by way of example and in terms of the preferred embodiment(s), it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201811184086.2 | Oct 2018 | CN | national |
| 201910261402.X | Apr 2019 | CN | national |
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