Camera optical lens

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, and more particularly, to a camera optical lens suitable for handheld terminal devices such as smart phones or digital cameras and camera devices such as monitors or PC lenses.

BACKGROUND

With the development of camera technology, camera optical lenses are widely applied in various electronic products, such as smart phones and digital cameras. For the purpose of portability, people are increasingly pursuing thinner and lighter electronic products, and thus miniature camera lenses with good imaging quality therefore have become a mainstream in the market.

In order to obtain better imaging quality, the lens that is conventionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. However, with the development of technology and the increase of the diverse demands of users, and as the pixel area of photosensitive devices is becoming smaller and smaller and the requirement of the system on the imaging quality is improving constantly, a five-piece lens structure gradually emerges in lens designs. Although the common five-piece lens has good optical performance, its settings on refractive power, lens spacing and lens shape still have some irrationality, which results in that the lens structure cannot achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses.

Therefore, it is urgent to provide a camera optical lens that has good optical performance and satisfies the requirements for large-aperture, wide-angle, and ultra-thin design.

SUMMARY

In view of the above problems, the present disclosure provides a camera optical lens, which can solve the problem that conventional camera optical lenses are not fully ultra-thinned, large-apertured and wide-angled.

In an embodiment, the present disclosure provides a camera optical lens including, from an object side to an image side: a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power, wherein the camera optical lens satisfies following conditions: 0.95≤f2/f≤2.00, −2.80≤f3/f≤−1.50, 3.20≤R7/R8≤6.00, 4.12≤(R1+R2)/(R1−R2)≤26.82, and 1.80≤d3/d5≤3 0.50, where f denotes a focal length of the camera optical lens, f2 denotes a focal length of the second lens, f3 denotes a focal length of the third lens, R1 denotes a curvature radius of an object side surface of the first lens, R2 denotes a curvature radius of an image side surface of the first lens, R7 denotes a curvature radius of an object side surface of the fourth lens, R8 denotes a curvature radius of an image side surface of the fourth lens, d3 denotes an on-axis thickness of the second lens, and d5 denotes an on-axis thickness of the third lens.

As an improvement, the camera optical lens further satisfies 1.50≤d7/d9≤3.00, where d7 denotes an on-axis thickness of the fourth lens, and d9 denotes an on-axis thickness of the fifth lens.

As an improvement, the camera optical lens further satisfies −72.07≤f1/f≤−6.87, and 0.04≤d1/TTL≤0.12, where f1 denotes a focal length of the first lens, d1 denotes an on-axis thickness of the first lens, and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies 0.09≤(R3+R4)/(R3−R4)≤1.26, and 0.07≤d3/TTL≤0.26, where R3 denotes a curvature radius of an object side surface of the second lens, R4 denotes a curvature radius of an image side surface of the second lens, and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies −0.68≤(R5+R6)/(R5−R6)≤1.50, and 0.03≤d5/TTL≤0.11, where R5 denotes a curvature radius of an object side surface of the third lens, R6 denotes a curvature radius of an image side surface of the third lens, and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies 0.38≤f4/f≤1.43, 0.70≤(R7+R8)/(R7−R8)≤2.81, and 0.11≤d7/TTL≤0.33, where f4 denotes a focal length of the fourth lens, d7 denotes an on-axis thickness of the fourth lens, and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies −4.11≤f5/f≤−0.75, 1.35≤(R9+R10)/(R9−R10)≤6.95, and 0.04≤d9/TTL≤0.20, where f5 denotes a focal length of the fifth lens, R9 denotes a curvature radius of an object side surface of the fifth lens, R10 denotes a curvature radius of an image side surface of the fifth lens, d9 denotes an on-axis thickness of the fifth lens, and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

As an improvement, the camera optical lens further satisfies FNO≤2.1, where FNO denotes an F number of the camera optical lens.

As an improvement, the camera optical lens further satisfies FOV≥97°, where FOV denotes a field of view of the camera optical lens.

As an improvement, the camera optical lens further satisfies 0.53≤f12/f≤3.13, where f12 denotes a combined focal length of the first lens and the second lens.

The present disclosure has the following beneficial effects. The camera optical lens according to the present disclosure can satisfy the design requirements for wide-angle and ultra-thin while having high optical performance and large-aperture, especially suitable for camera lens assembly of mobile phones and WEB camera lenses formed by CCD, CMOS and other imaging elements for high pixels.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a schematic diagram of a structure of a camera optical lens according to Embodiment 1 of the present disclosure;

FIG. 2 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 1;

FIG. 4 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a structure of a camera optical lens according to Embodiment 2;

FIG. 6 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 5;

FIG. 8 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a structure of a camera optical lens according to Embodiment 3;

FIG. 10 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 9;

FIG. 11 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 9; and

FIG. 12 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 9.

DESCRIPTION OF EMBODIMENTS

The present disclosure will hereinafter be described in detail with reference to several exemplary embodiments.

To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure.

Embodiment 1

Referring to FIG. 1 to FIG. 4, the present disclosure provides a camera optical lens 10 according to the Embodiment 1. In FIG. 1, a left side is an object side, and a right side is an image side. The camera optical lens 10 mainly includes five lenses, i.e., from the object side to the image side, including a first lens L1, an aperture S1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. A glass filter (GF) is arranged between the fifth lens L5 and an image plane Si, and the glass filter (GF) can be a glass plate or an optical filter.

In the present embodiment, the first lens L1 has a negative refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, and the fifth lens L5 has a negative refractive power.

In the present embodiment, the first lens L1 is made of a plastic material, the second lens L2 is made of a plastic material, the third lens L3 is made of a plastic material, the fourth lens L4 is made of a plastic material, and the fifth lens L5 is made of a plastic material.

Here, a focal length of the camera optical lens 10 is defined as f, a focal length of the second lens L2 is defined as f2, a focal length of the third lens L3 is defined as f3, a curvature radius of an object side surface of the fourth lens L4 is defined as R7, a curvature radius of an image side surface of the fourth lens L4 is defined as R8, an on-axis thickness of the second lens L2 is defined as d3, and an on-axis thickness of the third lens L3 is defined as d5. The camera optical lens 10 should satisfy following conditions:

0.95≤f2/f≤2.00 (1);
−2.80≤f3/f≤−1.50 (2);
3.20≤R7/R8≤6.00 (3); and
1.80≤d3/d5≤3.50 (4).

The condition (1) specifies a ratio of the focal length f2 of the second lens L2 to the focal length f of the camera optical lens 10. When f2/f satisfies such a condition, the refractive power of the second lens L2 can be effectively distributed to correct aberrations of the optical system, thereby improving imaging quality.

The condition (2) specifies a ratio of the focal length f3 of the third lens L3 to the focal length f of the camera optical lens 10. This condition facilitates improving the performance of the optical system.

The condition (3) specifies a shape of the fourth lens L4. This condition can alleviate deflection of light passing through the lens while effectively reducing aberrations.

The condition (4) specifies a ratio of the on-axis thickness d3 of the second lens L2 to the on-axis thickness d5 of the third lens L3. When d3/d5 satisfies the condition, the imaging performance can be improved.

The focal length of the camera optical lens 10 is f, an on-axis thickness of the fourth lens L4 is defined as d7, and an on-axis thickness of the fifth lens L5 is defined as d9. The camera optical lens 10 should satisfy a condition of 1.50≤d7/d9≤3.00, which specifies a ratio of the on-axis thickness d7 of the fourth lens L4 to the on-axis thickness d9 of the fifth lens L5. This condition is beneficial to correcting of the aberrations and improving the imaging quality.

In the present embodiment, the first lens L1 includes an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region.

The focal length of the camera optical lens 10 is f, and a focal length of the first lens L1 is defined as f1. The camera optical lens 10 should satisfy a condition of −72.07≤f1/f≤−6.87, which specifies a ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens 10. When the condition is satisfied, the first lens L1 has an appropriate negative refractive power, thereby reducing aberrations of the system while facilitating development towards ultra-thin, wide-angle lenses. As an example, −45.04≤f1/f≤−8.59.

A curvature radius of the object side surface of the first lens L1 is defined as R1, and a curvature radius of the image side surface of the first lens L1 is defined as R2. The camera optical lens 10 should satisfy a condition of 4.12≤(R1+R2)/(R1−R2)≤26.82, which can reasonably control a shape of the first lens L1, allowing the first lens L1 to effectively correct spherical aberrations of the system. As an example, 6.59≤(R1+R2)/(R1−R2)≤21.46.

An on-axis thickness of the first lens L1 is defined as d1, and a total optical length from the object side surface of the first lens L1 to an image plane of the camera optical lens along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.04≤d1/TTL≤0.12. This condition can facilitate achieving ultra-thin lenses. As an example, 0.06≤d1/TTL≤0.09.

In the present embodiment, the second lens L2 includes an object side surface being convex in a paraxial region and an image side surface being convex in the paraxial region.

A curvature radius of the object side surface of the second lens L2 is defined as R3, and a curvature radius of the image side surface of the second lens L2 is defined as R4. The camera optical lens 10 should satisfy a condition of 0.09≤(R3+R4)/(R3−R4)≤1.26, which specifies a shape of the second lens L2. This condition can facilitate correction of an on-axis aberration with development towards ultra-thin lenses. As an example, 0.15≤(R3+R4)/(R3−R4)≤1.01.

An on-axis thickness of the second lens L2 is defined as d3, and the total optical length from the object side surface of the first lens L1 to an image plane of the camera optical lens 10 along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.07≤d3/TTL≤0.26, which facilitates achieving the ultra-thin lenses. As an example, 0.11≤d3/TTL≤0.21.

In the present embodiment, the third lens L3 includes an object side surface being concave in a paraxial region and an image side surface being concave in the paraxial region.

A curvature radius of the object side surface of the third lens L3 is defined as R5, and a curvature radius of the image side surface of the third lens L3 is defined as R6. The camera optical lens 10 should satisfy a condition of −0.68≤(R5+R6)/(R5−R6)≤1.50, which specifies a shape of the third lens L3, and conducive to the shaping of the third lens L3. This condition can alleviate the deflection of light passing through the lens while effectively reducing aberrations. As an example, −0.42≤(R5+R6)/(R5−R6)≤1.20.

An on-axis thickness of the third lens L3 is defined as d5, and the total optical length from the object side surface of the first lens L1 to an image plane of the camera optical lens 10 along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.03≤d5/TTL≤0.11, which facilitates achieving ultra-thin lenses. As an example, 0.04≤d5/TTL≤0.09.

In the present embodiment, the fourth lens L4 includes an object side surface being concave in a paraxial region and an image side surface being convex in the paraxial region.

A focal length of the camera optical lens 10 is f, and a focal length of the fourth lens L4 is f4. The camera optical lens 10 further satisfies a condition of 0.38≤f4/f≤1.43, which specifies a ratio of the focal length f4 of the fourth lens L4 to the focal length f of the camera optical lens 10. With the appropriate distribution of the refractive power, a better imaging quality and a lower sensitivity of the system can be achieved. As an example, 0.61≤f4/f≤1.15.

A curvature radius of the object side surface of the fourth lens L4 is defined as R7, and a curvature radius of the image side surface of the fourth lens L4 is defined as R8. The camera optical lens 10 should satisfy a condition of 0.70≤(R7+R8)/(R7−R8)≤2.81, which specifies a shape of the fourth lens L4. This condition can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 1.12≤(R7+R8)/(R7−R8)≤2.25.

An on-axis thickness of the fourth lens L4 is defined as d7, and the total optical length from the object side surface of the first lens L1 to an image plane of the camera optical lens 10 along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.11≤d7/TTL≤0.33. This can facilitate achieving ultra-thin lenses. As an example, 0.17≤d7/TTL≤0.27.

In the present embodiment, the fifth lens L5 includes an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region.

A focal length of the fifth lens L5 is f5, and the focal length of the camera optical lens 10 is f. The camera optical lens 10 further satisfies a condition of −4.11≤f5/f≤−0.75. Limitations on the fifth lens L5 can effectively make a light angle of the camera optical lens 10 gentle and reduce the tolerance sensitivity. As an example, −2.57≤f5/f≤−0.93.

A curvature radius of the object side surface of the fifth lens L5 is defined as R9, and a curvature radius of the image side surface of the fifth lens L5 is defined as R10. The camera optical lens 10 should satisfy a condition of 1.35≤(R9+R10)/(R9−R10)≤6.95, which specifies a shape of the fifth lens L5. This can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 2.17≤(R9+R10)/(R9−R10)≤5.56.

An on-axis thickness of the fifth lens L5 is defined as d9, and the total optical length from the object side surface of the first lens L1 to an image plane of the camera optical lens 10 along an optic axis is defined as TTL. The camera optical lens 10 should satisfy a condition of 0.04≤d9/TTL≤0.20. This can facilitate achieving ultra-thin lenses. As an example, 0.06≤d9/TTL≤0.16.

In the present embodiment, an image height of the camera optical lens 10 is defined as IH. The camera optical lens 10 should satisfy a condition of TTL/IH≤1.90. This condition can facilitate achieving ultra-thin lenses.

In the present embodiment, an F number of the camera optical lens 10 is FNO, and the camera optical lens 10 should satisfy a condition of FNO≤2.1, thereby achieving a large aperture.

In the present embodiment, a field of view (FOV) of the camera optical lens 10 is larger than or equal to 97°, thereby achieving a wide angle.

In the present embodiment, the focal length of the camera optical lens 10 is defined as f, and a combined focal length of the first lens L1 and the second lens L2 is defined as f12. The camera optical lens 10 should satisfy a condition of 0.53≤f12/f≤3.13, thereby eliminating aberration and distortion of the camera optical lens 10, suppressing the back focal length of the camera optical lens 10, and maintaining miniaturization of the camera lens system group. As an example, 0.85≤f12/f≤2.50.

In addition, in the camera optical lens 10 provided by the present embodiment, the surface of each lens is an aspherical surface, which is easy to be made into a shape other than a spherical surface, to obtain more control variables for reducing aberrations, thereby reducing a number of the required lenses. In this way, the total length of the camera optical lens 10 can be effectively reduced. In the present embodiment, the object side surface and the image side surface of each lens are all aspherical surfaces.

Since the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 have the structure and satisfy parameter relationship as mentioned above, the camera optical lens 10 can reasonably allocate the refractive power, spacing and shape of each lens, and thus can correct various aberrations.

Thus, the camera optical lens 10 can further satisfy design requirements for ultra-thin, large aperture, and wide-angle lenses while having high optical performance.

Examples of the camera optical lens 10 of the present disclosure are described below. The symbols recorded in each example will be described as follows. The focal length, on-axis distance, curvature radius, on-axis thickness, inflexion point position, and arrest point position are all in units of mm.

TTL: total optical length (on-axis distance from the object side surface of the first lens L1 to the image plane Si of the camera optical lens along the optic axis) in mm.

F number (FNO): a ratio of an effective focal length of the camera optical lens to an entrance pupil diameter of the camera optical lens.

In addition, inflexion points and/or arrest points can be arranged on at least one of the object side surface and the image side surface of each lens, so as to satisfy the demand for the high quality imaging. The specific implementations can be referred to the description below.

The design data of the camera optical lens 10 shown in FIG. 1 is listed below.

Table 1 includes the curvature radius of the object side surface and the curvature radius R of the image side surface of each of the first lens L1 to the fifth lens L5, which constitute the camera optical lens 10 in the Embodiment 1 of the present disclosure, the on-axis thickness of each lens, the distance d between adjacent lenses, refractive index nd and abbe number vd. It should be noted that R and d are both in units of millimeter (mm).

TABLE 1

R
d
nd
vd

S1
∞
d0=
−0.568

R1
2.821
d1=
0.329
nd1
1.6359
v1
23.82

R2
2.210
d2=
0.248

R3
16.331
d3=
0.608
nd2
1.5450
v2
55.81

R4
−1.392
d4=
0.072

R5
−100.000
d5=
0.230
nd3
1.6610
v3
20.53

R6
3.472
d6=
0.214

R7
−2.857
d7=
0.940
nd4
1.5450
v4
55.81

R8
−0.705
d8=
0.049

R9
1.177
d9=
0.429
nd5
1.6153
v5
25.94

R10
0.542
d10=
0.500

R11
∞
d11=
0.210
ndg
1.5168
vg
64.17

R12
∞
d12=
0.411

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radius for a lens;

R1: curvature radius of the object side surface of the first lens L1;

R2: curvature radius of the image side surface of the first lens L1;

R3: curvature radius of the object side surface of the second lens L2;

R4: curvature radius of the image side surface of the second lens L2;

R5: curvature radius of the object side surface of the third lens L3;

R6: curvature radius of the image side surface of the third lens L3;

R7: curvature radius of the object side surface of the fourth lens L4;

R8: curvature radius of the image side surface of the fourth lens L4;

R9: curvature radius of the object side surface of the fifth lens L5;

R10: curvature radius of the image side surface of the fifth lens L5;

R11: curvature radius of an object side surface of the optical filter GF;

R12: curvature radius of an image side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface of the first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the optical filter GF;

d11: on-axis thickness of the optical filter GF;

d12: on-axis distance from the image side surface of the optical filter GF to the image plane;

nd: refractive index of d line;

nd1: refractive index of d line of the first lens L1;

nd2: refractive index of d line of the second lens L2;

nd3: refractive index of d line of the third lens L3;

nd4: refractive index of d line of the fourth lens L4;

nd5: refractive index of d line of the fifth lens L5;

ndg: refractive index of d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

vg: abbe number of the optical filter GF.

Table 2 shows aspheric surface data of respective lens in the camera optical lens 10 according to Embodiment 1 of the present disclosure.

TABLE 2

Conic coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12

R1
−2.1081E+01
3.8077E−01
−2.8273E−01
1.6418E−01
5.6056E+00
−3.2425E+01

R2
−7.7837E+01
1.3421E+00
−3.8014E+00
3.5506E+00
1.7163E+02
−1.6321E+03

R3
8.5153E+01
9.5353E−03
−9.4210E−01
2.6541E+01
−5.0372E+02
5.3040E+03

R4
1.5546E−01
−6.7573E−01
2.0032E+00
8.7440E+00
−1.7287E+02
1.0355E+03

R5
9.9000E+01
−1.1826E+00
6.2834E+00
−4.6240E+01
2.9414E+02
−1.3312E+03

R6
1.1858E+01
−6.9770E−01
2.7558E+00
−1.4532E+01
6.2096E+01
−1.8768E+02

R7
6.2730E+00
1.6245E−01
−3.3978E−01
1.0313E+00
−2.5720E+00
9.9658E+00

R8
−1.2415E+00
−6.2169E−02
1.7238E+00
−8.7316E+00
2.4265E+01
−4.2728E+01

R9
−1.9938E+01
1.1602E−01
−8.2410E−01
1.5866E+00
−1.9346E+00
1.5442E+00

R10
−3.8010E+00
−1.9758E−01
1.3056E−01
−6.0779E−02
9.2404E−03
9.3109E−03

Aspherical surface coefficients

A14
A16
A18
A20

R1
9.1716E+01
−1.4604E+02
1.2560E+02
−4.5831E+01

R2
7.7969E+03
−2.1647E+04
3.3447E+04
−2.2639E+04

R3
−3.4173E+04
1.3399E+05
−2.9643E+05
2.8475E+05

R4
−3.5470E+03
7.4105E+03
−8.7885E+03
4.5063E+03

R5
3.7926E+03
−6.3834E+03
5.7971E+03
−2.1886E+03

R6
3.5995E+02
−4.1341E+02
2.6063E+02
−6.9650E+01

R7
−3.0734E+01
4.7841E+01
−3.4725E+01
9.5049E+00

R8
4.8812E+01
−3.4938E+01
1.4164E+01
−2.4626E+00

R9
−7.8064E−01
2.2314E−01
−2.7624E−02
2.8427E−04

R10
−7.8457E−03
2.7673E−03
−4.8378E−04
3.4128E−05

In Table 2, k is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are aspheric surface coefficients.

IH: Image Height

y=(x²/R)/[1+{1−(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶+A18x¹⁸+A20x²⁰ (5)

where x is a vertical distance between a point on an aspherical curve and the optic axis, and y is an aspherical depth (a vertical distance between a point on an aspherical surface, having a distance x from the optic axis, and a surface tangent to a vertex of the aspherical surface on the optic axis).

In the present embodiment, an aspheric surface of each lens surface uses the aspheric surfaces shown in the above condition (5). However, the present disclosure is not limited to the aspherical polynomial form shown in the condition (5).

Table 3 and Table 4 show design data of inflexion points and arrest points of respective lens in the camera optical lens 10 of the present embodiment. P1R1 and P1R2 represent the object side surface and the image side surface of the first lens L1, respectively; P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, respectively; P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, respectively; P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, respectively; and P5R1 and P5R2 represent the object side surface and the image side surface of the fifth lens L5, respectively. The data in the column “inflexion point position” refers to vertical distances from inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column “arrest point position” refers to vertical distances from arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

TABLE 3

Number of
Inflexion point
Inflexion point

inflexion points
position 1
position 2

P1R1
1
0.815
/

P1R2
1
0.575
/

P2R1
1
0.285
/

P2R2
0
/
/

P3R1
1
0.685
/

P3R2
2
0.245
0.785

P4R1
2
0.805
0.965

P4R2
1
0.955
/

P5R1
2
0.405
1.335

P5R2
2
0.465
1.865

TABLE 4

Number of arrest points
Arrest point position 1

P1R1
0
/

P1R2
0
/

P2R1
1
0.395

P2R2
0
/

P3R1
0
/

P3R2
1
0.475

P4R1
0
/

P4R2
0
/

P5R1
1
0.805

P5R2
1
1.265

Table 13 below further lists various values of Embodiments 1, 2 and 3 and parameters which are specified in the above conditions.

As shown in Table 3, Embodiment 1 satisfies the various conditions.

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing the camera optical lens 10. FIG. 4 illustrates a field curvature and a distortion of light with a wavelength of 555 nm after passing the camera optical lens 10, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 0.959 mm. The image height IH is 2.300 mm. The FOV (field of view) along a diagonal direction is 97.80°. Thus, the camera optical lens 10 can satisfy design requirements of ultra-thin, large-aperture and wide-angle while the on-axis and off-axis aberrations are sufficiently corrected, thereby leading to better optical characteristics.

Embodiment 2

FIG. 5 is a structural schematic diagram of the camera optical lens 20 in Embodiment 2. Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and the same portions will not be repeated. Only differences therebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 5

R
d
nd
vd

S1
∞
d0=
−0.572

R1
2.781
d1=
0.332
nd1
1.6359
v1
23.82

R2
2.239
d2=
0.240

R3
8.462
d3=
0.750
nd2
1.5450
v2
55.81

R4
−1.124
d4=
0.050

R5
−3.030
d5=
0.220
nd3
1.6610
v3
20.53

R6
6.121
d6=
0.175

R7
−2.730
d7=
0.919
nd4
1.5450
v4
55.81

R8
−0.830
d8=
0.040

R9
0.727
d9=
0.316
nd5
1.6153
v5
25.94

R10
0.469
d10=
0.637

R11
∞
d11=
0.210
ndg
1.5168
vg
64.17

R12
∞
d12=
0.411

Table 6 shows aspheric surface data of respective lenses in the camera optical lens 20 according to Embodiment 2 of the present disclosure.

TABLE 6

Conic coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12

R1
−2.0792E+01
3.2986E−01
2.4322E−01
−3.3218E+00
1.9649E+01
−6.8870E+01

R2
−4.9804E+01
1.1692E+00
−6.1779E+00
7.5834E+01
−7.0724E+02
4.4523E+03

R3
−1.3884E+01
−4.3954E−02
4.0426E+00
−1.1710E+02
1.8688E+03
−1.8392E+04

R4
−3.1485E+00
1.4549E+00
−1.7595E+01
1.2078E+02
−5.7067E+02
1.8172E+03

R5
1.1427E+01
1.8026E+00
−1.7326E+01
1.0246E+02
−4.0271E+02
1.0588E+03

R6
3.4975E+01
6.3854E−01
−5.7980E+00
2.5088E+01
−6.9775E+01
1.3016E+02

R7
5.7126E+00
7.0133E−01
−3.1130E+00
9.8937E+00
−2.4734E+01
4.6976E+01

R8
−1.2059E+00
−3.0910E−02
1.1816E+00
−5.1037E+00
1.0927E+01
−1.3849E+01

R9
−5.1565E+00
2.3200E−01
−8.7693E−01
1.1505E+00
−9.6531E−01
5.4158E−01

R10
−2.7007E+00
−6.4641E−02
−2.0333E−01
3.3324E−01
−2.8550E−01
1.5571E−01

Aspherical surface coefficients

A14
A16
A18
A20

R1
1.5265E+02
−2.0885E+02
1.6131E+02
−5.4191E+01

R2
−1.7995E+04
4.4692E+04
−6.1990E+04
3.6481E+04

R3
1.1231E+05
−4.1418E+05
8.4135E+05
−7.1994E+05

R4
−3.8863E+03
5.3607E+03
−4.3068E+03
1.5289E+03

R5
−1.8572E+03
2.0807E+03
−1.3363E+03
3.7314E+02

R6
−1.6353E+02
1.3269E+02
−6.2715E+01
1.3104E+01

R7
−5.9386E+01
4.5254E+01
−1.8450E+01
3.0158E+00

R8
1.0516E+01
−4.4951E+00
9.4731E−01
−6.9280E−02

R9
−1.9561E−01
4.1241E−02
−4.0862E−03
8.5695E−05

R10
−5.5263E−02
1.2294E−02
−1.5536E−03
8.5045E−05

Table 7 and Table 8 show design data of inflexion points and arrest points of respective lens in the camera optical lens 20.

TABLE 7

Number of
Inflexion point
Inflexion point

inflexion points
position 1
position 2

P1R1
1
0.815
/

P1R2
1
0.575
/

P2R1
1
0.355
/

P2R2
0
/
/

P3R1
1
0.755
/

P3R2
2
0.405
0.935

P4R1
2
0.705
0.825

P4R2
1
0.925
/

P5R1
2
0.515
1.505

P5R2
2
0.525
1.905

TABLE 8

Number of arrest points
Arrest point position 1

P1R1
0
/

P1R2
0
/

P2R1
0
/

P2R2
0
/

P3R1
0
/

P3R2
1
0.725

P4R1
0
/

P4R2
0
/

P5R1
1
1.025

P5R2
1
1.345

Table 13 below further lists various values of Embodiment 2 and parameters which are specified in the above conditions. Obviously, the camera optical lens of the present embodiment satisfies the various conditions.

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 435 nm after passing the camera optical lens 20. FIG. 8 illustrates a field curvature and a distortion of light with a wavelength of 555 nm after passing the camera optical lens 20, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 0.941 mm. The image height IH is 2.300 mm. The FOV (field of view) along a diagonal direction is 97.80°. Thus, the camera optical lens 20 can satisfy design requirements of ultra-thin, large-aperture and wide-angle while the on-axis and off-axis aberrations are sufficiently corrected, thereby leading to better optical characteristics.

Embodiment 3

FIG. 9 is a structural schematic diagram of the camera optical lens 30 in Embodiment 3. Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and the same portions will not be repeated. Only differences therebetween will be described in the following.

In the present embodiment, the object side surface of the third lens L3 is convex at the paraxial region.

Table 9 and Table 10 show design data of a camera optical lens 30 in Embodiment 3 of the present disclosure.

TABLE 9

R
d
nd
vd

S1
∞
d0=
−0.569

R1
3.408
d1=
0.326
nd1
1.6359
v1
23.82

R2
3.047
d2=
0.230

R3
4.825
d3=
0.581
nd2
1.5450
v2
55.81

R4
−3.300
d4=
0.082

R5
2177.491
d5=
0.304
nd3
1.6610
v3
20.53

R6
3.575
d6=
0.100

R7
−4.575
d7=
0.896
nd4
1.5450
v4
55.81

R8
−0.764
d8=
0.040

R9
1.429
d9=
0.563
nd5
1.6153
v5
25.94

R10
0.694
d10=
0.490

R11
∞
d11=
0.210
ndg
1.5168
vg
64.17

R12
∞
d12=
0.411

Table 10 shows aspheric surface data of respective lenses in the camera optical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 10

Conic coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12

R1
−3.0928E+01
3.3366E−01
1.5886E−01
−2.9833E+00
1.7657E+01
−5.7544E+01

R2
−2.7169E+01
8.3854E−01
−5.2058E+00
7.8654E+01
−7.5247E+02
4.6145E+03

R3
6.5175E+01
6.7478E−02
−8.8803E−01
2.0752E+01
−5.3656E+02
7.6807E+03

R4
7.2805E+00
−1.0773E+00
3.2150E+00
−9.0955E+00
−1.0964E+01
1.5016E+02

R5
9.9000E+01
−1.7728E+00
8.5483E+00
−7.6910E+01
5.5793E+02
−2.7194E+03

R6
2.0326E+00
−7.4097E−01
1.3197E+00
1.5459E−01
−8.7191E+00
2.7359E+01

R7
−1.0927E+00
2.0263E−01
−1.6180E+00
9.4483E+00
−2.9039E+01
5.3066E+01

R8
−9.3892E−01
−2.2111E−01
2.9500E+00
−1.3401E+01
3.6510E+01
−6.4278E+01

R9
−3.4140E+01
2.7253E−01
−1.0934E+00
2.0608E+00
−2.7763E+00
2.6121E+00

R10
−4.2871E+00
−1.1962E−01
8.7831E−02
−1.0361E−01
9.5673E−02
−5.6839E−02

Aspherical surface coefficients

A14
A16
A18
A20

R1
1.1366E+02
−1.3478E+02
8.8203E+01
−2.4656E+01

R2
−1.7891E+04
4.2437E+04
−5.6218E+04
3.1787E+04

R3
−6.3927E+04
3.0606E+05
−7.8406E+05
8.3260E+05

R4
−6.3359E+02
1.8021E+03
−3.0425E+03
2.1294E+03

R5
8.1801E+03
−1.4402E+04
1.3499E+04
−5.1307E+03

R6
−5.8431E+01
8.4883E+01
−6.9060E+01
2.3024E+01

R7
−6.1535E+01
4.2698E+01
−1.4433E+01
1.0926E+00

R8
7.3831E+01
−5.3114E+01
2.1565E+01
−3.7421E+00

R9
−1.6367E+00
6.3351E−01
−1.3404E−01
1.1672E−02

R10
2.0831E−02
−4.5612E−03
5.4606E−04
−2.7353E−05

Table 11 and Table 12 show design data of inflexion points and arrest points of respective lens in the camera optical lens 30.

TABLE 11

Number of
Inflexion point
Inflexion point

inflexion points
position 1
position 2

P1R1
0
/
/

P1R2
0
/
/

P2R1
1
0.415
/

P2R2
0
/
/

P3R1
0
/
/

P3R2
1
0.205
/

P4R1
2
0.435
0.595

P4R2
1
0.925
/

P5R1
2
0.475
1.305

P5R2
2
0.535
1.895

TABLE 12

Number of arrest points
Arrest point position 1

P1R1
0
/

P1R2
0
/

P2R1
0
/

P2R2
0
/

P3R1
0
/

P3R2
1
0.385

P4R1
0
/

P4R2
0
/

P5R1
1
0.845

P5R2
1
1.325

Table 13 below further lists various values of Embodiment 3 and values corresponding to parameters which are specified in the above conditions. Obviously, the camera optical lens of the present embodiment satisfies the various conditions.

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing the camera optical lens 30. FIG. 12 illustrates a field curvature and a distortion of light with a wavelength of 555 nm after passing the camera optical lens 30, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 0.937 mm. The image height IH is 2.300 mm. The FOV (field of view) along a diagonal direction is 97.80°. Thus, the camera optical lens 30 can satisfy design requirements of ultra-thin, large-aperture and wide-angle while the on-axis and off-axis aberrations are sufficiently corrected, thereby leading to better optical characteristics.

Table 13 below further lists various values of Embodiment 1, Embodiment 2, and Embodiment 3 and values corresponding to parameters which are specified in the above conditions.

TABLE 13

Parameters and

Conditions
Embodiment 1
Embodiment 2
Embodiment 3

f2/f
1.22
0.96
1.91

f3/f
−2.57
−1.55
−2.79

R7/R8
4.05
3.29
5.99

d3/d5
2.64
3.41
1.91

f
1.955
1.949
1.925

f1
−20.147
−23.589
−69.368

f2
2.375
1.867
3.677

f3
−5.029
−3.011
−5.371

f4
1.482
1.862
1.548

f5
−2.188
−4.008
−3.081

f12
2.740
2.067
4.013

FNO
2.04
2.07
2.05

TTL
4.240
4.300
4.233

FOV
97.80°
97.80°
97.80°

IH
2.300
2.300
2.300

The above are some embodiments of the present disclosure. It should be understood that, those of ordinary skill in the art can make improvements without departing from the inventive concept of the present disclosure, and these improvements shall fall within the scope of the present disclosure.

Camera optical lens

Information

Patent Number

Date Filed

Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

Field of Search

US

CPC

International Classifications

Term Extension

Abstract

Description

Claims

Priority Claims (1)

US Referenced Citations (1)

Related Publications (1)