Camera Optical Lens

FIELD OF THE PRESENT DISCLOSURE

The present disclosure relates to optical lens, in particular to a camera optical lens suitable for handheld devices such as smart phones and digital cameras and imaging devices.

DESCRIPTION OF RELATED ART

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but the photosensitive devices of general camera lens are no other than Charge Coupled Device (CCD) or Complementary metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices shrink, coupled with the current development trend of electronic products being that their functions should be better and their shape should be thin and small, miniature camera lens with good imaging quality therefor has become a mainstream in the market. In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. And, with the development of technology and the increase of the diverse demands of users, and under this circumstances that the pixel area of photosensitive devices is shrinking steadily and the requirement of the system for the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structure gradually appear in lens design. There is an urgent need for ultra-thin wide-angle camera lenses which have good optical characteristics and the chromatic aberration of which is fully corrected.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the exemplary embodiments can be better understood with reference to the following drawings. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.

FIG. 1 is a schematic diagram of a camera optical lens in accordance with a first embodiment of the present invention;

FIG. 2 shows the longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 shows the lateral color of the camera optical lens shown in FIG. 1;

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

FIG. 5 is a schematic diagram of a camera optical lens in accordance with a second embodiment of the present invention;

FIG. 6 presents the longitudinal aberration of the camera optical lens shown in FIG. 5;

FIG. 7 presents the lateral color of the camera optical lens shown in FIG. 5;

FIG. 8 presents the field curvature and distortion of the camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a camera optical lens in accordance with a third embodiment of the present invention;

FIG. 10 presents the longitudinal aberration of the camera optical lens shown in FIG. 9;

FIG. 11 presents the lateral color of the camera optical lens shown in FIG. 9;

FIG. 12 presents the field curvature and distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF THE EXEMPLARY 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

As referring to FIG. 1, the present invention provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 of embodiment 1 of the present invention, the camera optical lens 10 comprises 7 lenses. Specifically, from the object side to the image side, the camera optical lens 10 comprises in sequence: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7. Optical element like optical filter GF can be arranged between the seventh lens L7 and the image surface Si. The first lens L1 is made of glass material, the second lens L2 is made of plastic material, the third lens L3 is made of glass material, the fourth lens L4 is made of plastic material, the fifth lens L5 is made of plastic material, the sixth lens L6 is made of plastic material, the seventh lens L7 is made of plastic material;

Here, the focal length of the whole camera optical lens 10 is defined as f, the focal length of the first lens is defined as f1, the curvature radius of the object side surface of the first lens is defined as R1, the curvature radius of the image side surface of the first lens is defined as R2, the refractive power of the third lens is n3, the refractive power of the first lens is n1, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7. The camera optical lens 10 satisfies the following conditions: −3 custom-character f1/f−1, 1.7n12.2, 1f6/f710; 2(R1+R2)/(R1−R2)10; 1.7n32.2.

Condition −3 custom-character f1/f−1 fixes the negative refractive power of the first lens L1. If the upper limit of the set value is exceeded, although it benefits the ultra-thin development of lenses, but the negative refractive power of the first lens L1 will be too strong, problem like aberration is difficult to be corrected, and it is also unfavorable for wide-angle development of lens. On the contrary, if the lower limit of the set value is exceeded, the negative refractive power of the first lens becomes too weak, it is then difficult to develop ultra-thin lenses. Preferably, the following condition shall be satisfied, −2.85 custom-character f1/f−1.09.

Condition 1.7 custom-character n12.2 fixes the refractive power of the first lens L1, refractive power within this range benefits the ultra-thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.709n11.98.

Condition 1 custom-character f6/f710 fixes the ratio between the focal length f6 of the sixth lens L6 and the focal length f7 of the seventh lens L7, a ratio within this range can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the following condition shall be satisfied, 1.73 custom-character f6/f78.5.

Condition 2 custom-character (R1+R2)/(R1−R2)10 fixes the shape of the first lens L1, when the value is beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the condition 2.5 custom-character (R1+R2)/(R1−R2) 8.95 shall be satisfied.

Condition 1.7 custom-character n32.2 fixes the refractive power of the third lens L3, this condition benefits the ultra-thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.71n32.01.

When the focal length of the camera optical lens 10 of the present invention, the focal length of each lens, the refractive power of the related lens, and the total optical length, the thickness on-axis and the curvature radius of the camera optical lens satisfy the above conditions, the camera optical lens 10 has the advantage of high performance and satisfies the design requirement of low TTL.

In this embodiment, the object side surface of the first lens L1 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens is f, the focal length of the first lens L1 is f1, the thickness on-axis of the first lens L1 is d1: they satisfy the following condition: 0.09 custom-character d10.27, when the condition is meet, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.14d10.22 shall be satisfied.

In this embodiment, the object side surface of the second lens L2 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has positive refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the second lens L2 is f2, the curvature radius of the object side surface of the second lens L2 is R3, the curvature radius of image side surface of the second lens L2 is R4 and the thickness on-axis of the second lens L2 is d3, they satisfy the following condition: 0.46 custom-character f2/f1.65, when the condition is met, the positive refractive power of the second lens L2 is controlled within reasonable scope, the spherical aberration caused by the first lens L1 which has negative refractive power and the field curvature of the system then can be reasonably and effectively balanced; the condition −2.45 custom-character (R3+R4)/(R3−R4)−0.69 fixes the shape of the second lens L2, when value is beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like on-axis chromatic aberration is difficult to be corrected; if the condition 0.21d30.95 is met, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied, 0.74 custom-character f2/f1.32; −1.53(R3+R4)/(R3−R4)−0.87; 0.34d30.76.

In this embodiment, the object side surface of the third lens L3 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis; the focal length of the whole camera optical lens 10 is f, the focal length of the third lens L3 is f3, the curvature radius of the object side surface of the third lens L3 is R5, the curvature radius of the image side surface of the third lens L3 is R6 and the thickness on-axis of the third lens L3 is d5, they satisfy the condition: −457.17 custom-character f3/f8.35, by meeting this condition, it is helpful for the system to obtain good ability in balancing the field curvature, so that the image quality can be effectively improved; by meeting the condition −68.26(R5+R6)/(R5−R6)107.19 the shape of the third lens L3 can be effectively controlled, it is beneficial for the shaping of the third lens L3 and bad shaping and stress generation due to extra large curvature of surface of the third lens L3 can be avoided; when the condition 0.15 custom-character d50.46 is met, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied: −285.73f3/f6.68; −42.66(R5+R6)/(R5−R6)85.75; 0.24d50.37.

In this embodiment, the object side surface of the fourth lens L4 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the fourth lens L4 is f4, the curvature radius of the object side surface of the fourth lens L4 is R7, the curvature radius of the image side surface of the fourth lens L4 is R8 and the thickness on-axis of the fourth lens L4 is d7, they satisfy the condition: −6.34 custom-character f4/f−1.65, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition 1.01(R7+R8)/(R7−R8)3.87 fixes the shape of the fourth lens L4, when beyond this range, with the development into the direction of ultra-thin and wide-angle lens, the problem like chromatic aberration is difficult to be corrected; when the condition 0.18 custom-character d70.68 is met, it is beneficial for realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied, −3.96f4/f−2.07; 1.62(R7+R8)/(R7−R8)3.1; 0.29d70.54.

In this embodiment, the object side surface of the fifth lens L5 is a concave surface relative to the proximal axis, its image side surface is a convex surface relative to the proximal axis, and it has positive refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the fifth lens L5 is f5, the curvature radius of the object side surface of the fifth lens L5 is R9, the curvature radius of the image side surface of the fifth lens L5 is R10 and the thickness on-axis of the fifth lens L5 is d9, they satisfy the condition: 0.27 custom-character f5/f0.96, the limitation on the fifth lens L5 can effectively make the light angle of the camera lens flat and the tolerance sensitivity reduces; the condition 0.63(R9+R10)/(R9−R10)1.91 fixes the shape of the fifth lens L5, when beyond this range, with the development into the direction of ultra-thin and wide-angle lens, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.52 custom-character d91.57 is met, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied: 0.43f5/f0.76; 1.01(R9+R10)/(R9−R10)1.52; 0.84d91.26.

In this embodiment, the object side surface of the sixth lens L6 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the focal length of the sixth lens L6 is f6, the curvature radius of the object side surface of the sixth lens L6 is R11, the curvature radius of the image side surface of the sixth lens L6 is R12 and the thickness on-axis of the sixth lens L6 is d11, they satisfy the condition: −17.21 custom-character f6/f−1.82, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition 1.25(R11+R12)/(R11−R12)7.9 fixes the shape of the sixth lens L6, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.24 custom-character d110.83 is met, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, −10.76f6/f−2.28; 2.00(R11+R12)/(R11−R12)6.32; 0.38d110.67.

In this embodiment, the object side surface of the seventh lens L7 is a convex surface relative to the proximal axis, its image side surface is a concave surface relative to the proximal axis, and it has negative refractive power; the focal length of the whole camera optical lens 10 is f, the curvature radius of the object side surface of the seventh lens L7 is R13, the curvature radius of the image side surface of the seventh lens L7 is R14, the focal length of the seventh lens L7 is f7, and the thickness on-axis of the seventh lens L7 is d13, they satisfy the condition: −2.23 custom-character f7/f−0.56 is met, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition: 0.88(R13+R14)/(R13−R14)3.33, which fixes the shape of the seventh lens L7, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, the problem like off-axis chromatic aberration is difficult to be corrected; when the condition 0.2 custom-character d130.95 is met, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, −1.4f7/f−0.7; 1.41(R13+R14)/(R13−R14)2.66; 0.32d130.76.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 7.32 mm, it is beneficial for the realization of ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 6.98 mm

In this embodiment, the aperture F number of the camera optical lens 10 is less than or equal to 2.37. A large aperture has better imaging performance. Preferably, the aperture F number of the camera optical lens 10 is less than or equal to 2.32.

With such design, the total optical length TTL of the whole camera optical lens 10 can be made as short as possible, thus the miniaturization characteristics can be maintained.

In the following, an example will be used to describe the camera optical lens 10 of the present invention. The symbols recorded in each example are as follows. The unit of distance, radius and center thickness is mm.

TTL: Optical length (the distance on-axis from the object side surface to the image surface of the first lens L1).

Preferably, inflexion points and/or arrest points can also be arranged on the object side surface and/or image side surface of the lens, so that the demand for high quality imaging can be satisfied, the description below can be referred for specific implementable scheme.

The design information of the camera optical lens 10 in the first embodiment of the present invention is shown in the following, the unit of the focal length, distance, radius and center thickness is mm.

The design information of the camera optical lens 10 in the first embodiment of the present invention is shown in the tables 1 and 2.

TABLE 1

R
d
nd
νd

S1
∞
d0 =
−0.076

R1
2.614
d1 =
0.180
nd1
1.7521
ν1
25.05

R2
1.746
d2 =
0.050

R3
2.309
d3 =
0.426
nd2
1.5441
ν2
56.12

R4
120.997
d4 =
0.030

R5
1.903
d5 =
0.304
nd3
1.7225
ν3
29.23

R6
2.018
d6 =
0.542

R7
11.887
d7 =
0.366
nd4
1.6713
ν4
19.24

R8
4.858
d8 =
0.351

R9
−10.807
d9 =
1.049
nd5
1.5352
ν5
56.12

R10
−1.230
d10 =
0.020

R11
7.808
d11 =
0.554
nd6
1.5352
ν6
56.12

R12
5.316
d12 =
0.100

R13
4.510
d13 =
0.634
nd7
1.5352
ν7
56.12

R14
1.244
d14 =
0.976

R15
∞
d15 =
0.210
ndg
1.5168
νg
64.17

R16
∞
d16 =
0.196

In which, the meaning of the various symbols is as follows.

S1: Aperture;

R: The curvature radius of the optical surface, the central curvature radius in case of lens;

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

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

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

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

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

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

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

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

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

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

R11: The curvature radius of the object side surface of the sixth lens L6;

R12: The curvature radius of the image side surface of the sixth lens L6;

R13: The curvature radius of the object side surface of the seventh lens L7;

R14: The curvature radius of the image side surface of the seventh lens L7;

R15: The curvature radius of the object side surface of the optical filter GF;

R16: The curvature radius of the image side surface of the optical filter GF;

d: The thickness on-axis of the lens and the distance on-axis between the lens;

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

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

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

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

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

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

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

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

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

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

d10: The distance on-axis from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

d11: The thickness on-axis of the sixth lens L6;

d12: The distance on-axis from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

d13: The thickness on-axis of the seventh lens L7;

d14: The distance on-axis from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;

d15: The thickness on-axis of the optical filter GF;

d16: The distance on-axis from the image side surface to the image surface of the optical filter GF;

nd: The refractive power of the d line;

nd1: The refractive power of the d line of the first lens L1;

nd2: The refractive power of the d line of the second lens L2;

nd3: The refractive power of the d line of the third lens L3;

nd4: The refractive power of the d line of the fourth lens L4;

nd5: The refractive power of the d line of the fifth lens L5;

nd6: The refractive power of the d line of the sixth lens L6;

nd7: The refractive power of the d line of the seventh lens L7;

ndg: The refractive power of the d line of the optical filter GF;

vd: The abbe number;

v1: The abbe number of the first lens L1;

v2: The abbe number of the second lens L2;

v3: The abbe number of the third lens L3;

v4: The abbe number of the fourth lens L4;

v5: The abbe number of the fifth lens L5;

v6: The abbe number of the sixth lens L6;

v7: The abbe number of the seventh lens L7;

vg: The abbe number of the optical filter GF;

Table 2 shows the aspherical surface data of the camera optical lens 10 in the embodiment 1 of the present invention.

TABLE 2

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
−3.7310E−01
−3.2429E−02
−5.8280E−03
−8.9983E−03
1.6874E−02
4.9488E−03
−8.1299E−03
−6.4832E−03

R2
−2.1882E+00
−2.4314E−02
2.7460E−03
1.3807E−02
8.3937E−03
1.7472E−02
1.2216E−02
4.6526E−02

R3
−4.0909E+00
−3.3051E−02
1.0867E−02
1.7942E−02
6.3424E−04
7.8632E−03
1.4327E−02
7.5626E−02

R4
0.0000E+00
−3.6048E−02
1.8658E−03
−1.5929E−02
2.0551E−03
−3.1704E−03
5.3907E−04
−2.6354E−02

R5
0.0000E+00
3.8133E−02
6.9601E−03
1.3756E−02
−4.3439E−03
−8.0138E−03
−8.0564E−05
−8.5628E−04

R6
0.0000E+00
3.7502E−02
1.0895E−02
1.9477E−02
5.1241E−02
−3.0730E−02
−5.3702E−02
3.7794E−02

R7
3.7862E+01
−1.1721E−01
−1.0036E−02
3.3774E−03
1.7743E−02
−3.0484E−04
−6.9591E−03
8.0525E−03

R8
8.9913E+00
−8.1130E−02
3.0246E−03
1.1634E−03
−7.1549E−04
4.2424E−04
0.0000E+00
0.0000E+00

R9
−2.0771E+02
1.1626E−02
1.4827E−02
−7.5739E−03
2.0498E−04
5.9046E−04
1.1214E−05
−2.7251E−05

R10
−2.9666E+00
−5.9634E−02
1.8428E−02
−1.4667E−03
5.7788E−04
2.4487E−05
1.1735E−05
5.4298E−06

R11
9.3498E+00
−3.2862E−02
2.0469E−03
1.3230E−04
−3.4172E−06
7.9234E−06
1.0213E−06
−3.1332E−07

R12
−5.9666E−01
−2.9230E−03
2.4904E−04
2.4318E−05
−3.5974E−06
−2.7228E−08
−4.9626E−08
−4.0272E−09

R13
−9.4616E+00
4.6556E−04
2.6222E−04
2.2014E−05
4.0914E−06
1.2858E−07
−2.6333E−08
−9.3724E−09

R14
−4.3062E+00
−1.5011E−02
2.1326E−03
−1.9416E−04
1.0600E−05
2.0110E−07
2.4334E−09
−2.0673E−09

Among them, K is a conic index, A4, A6, A8, A10, A12, A14, A16 are aspheric surface indexes.

IH: Image height

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

For convenience, the aspheric surface of each lens surface uses the aspheric surfaces shown in the above condition (1). However, the present invention is not limited to the aspherical polynomials form shown in the condition (1).

Table 3 and table 4 show the inflexion points and the arrest point design data of the camera optical lens 10 lens in embodiment 1 of the present invention. In which, R1 and R2 represent respectively the object side surface and image side surface of the first lens L1, R3 and R4 represent respectively the object side surface and image side surface of the second lens L2, R5 and R6 represent respectively the object side surface and image side surface of the third lens L3, R7 and R8 represent respectively the object side surface and image side surface of the fourth lens L4, R9 and R10 represent respectively the object side surface and image side surface of the fifth lens L5, R11 and R12 represent respectively the object side surface and image side surface of the sixth lens L6, R13 and R14 represent respectively the object side surface and image side surface of the seventh lens L7. The data in the column named “inflexion point position” are the vertical distances from the inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column named “arrest point position” are the vertical distances from the arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

TABLE 3

inflexion point
inflexion point
inflexion point

number
position 1
position 2

R1
0

R2
0

R3
0

R4
1
0.145

R5
0

R6
0

R7
2
0.255
0.955

R8
1
0.515

R9
1
0.495

R10
1
1.215

R11
2
0.625
1.665

R12
1
2.215

R13
1
2.585

R14
2
1.045
2.235

TABLE 4

arrest point
arrest point
arrest point

number
position 1
position 2

R1
0

R2
0

R3
0

R4
1
0.235

R5
0

R6
0

R7
1
0.425

R8
1
0.915

R9
1
0.865

R10
1
1.625

R11
2
1.125
1.935

R12
0

R13
0

R14
0

FIG. 2 and FIG. 3 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 10 in the first embodiment. FIG. 4 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 10 in the first embodiment, the field curvature S in FIG. 4 is a field curvature in the sagittal direction, T is a field curvature in the meridian direction.

Table 13 shows the various values of the examples 1, 2, 3 and the values corresponding with the parameters which are already specified in the conditions.

As shown in Table 13, the first embodiment satisfies the various conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 1.6987 mm, the full vision field image height is 2.994 mm, the vision is field angle in the diagonal direction is 75.64°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described.

Table 5 and table 6 show the design data of the camera optical lens 20 in embodiment 2 of the present invention.

TABLE 5

R
d
nd
νd

S1
∞
d0 =
−0.076

R1
3.295
d1 =
0.180
nd1
1.7174
ν1
29.50

R2
1.647
d2 =
0.102

R3
1.942
d3 =
0.635
nd2
1.5445
ν2
55.99

R4
31.449
d4 =
0.030

R5
3.107
d5 =
0.304
nd3
1.8211
ν3
24.06

R6
3.894
d6 =
0.553

R7
10.009
d7 =
0.452
nd4
1.6713
ν4
19.24

R8
4.422
d8 =
0.351

R9
−9.069
d9 =
1.049
nd5
1.5352
ν5
56.12

R10
−1.081
d10 =
0.020

R11
7.098
d11 =
0.477
nd6
1.5352
ν6
56.12

R12
4.467
d12 =
0.100

R13
4.240
d13 =
0.395
nd7
1.5352
ν7
56.12

R14
1.240
d14 =
1.154

R15
∞
d15 =
0.210
ndg
1.5168
νg
64.17

R16
∞
d16 =
0.639

Table 6 shows the aspherical surface data of each lens of the camera optical lens 20 in embodiment 2 of the present invention.

TABLE 6

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
−1.0320E+00
−3.4327E−02
1.6562E−03
1.2346E−02
2.7139E−03
−7.9043E−03
3.3686E−03
0.0000E+00

R2
−2.3364E+00
−1.5593E−02
1.4481E−03
1.0375E−02
6.0324E−03
−7.9851E−03
2.2659E−03
0.0000E+00

R3
−2.8516E+00
−1.6564E−02
−3.8531E−02
−1.9224E−02
1.3573E−03
9.1603E−03
−1.7109E−02
0.0000E+00

R4
0.0000E+00
−7.5891E−02
−2.2487E−02
−1.1088E−02
3.2439E−04
1.8525E−03
−1.6189E−03
−1.1590E−03

R5
0.0000E+00
7.6587E−04
9.7374E−03
8.3750E−03
−2.3620E−03
−3.0257E−05
−2.4793E−04
−2.1564E−05

R6
0.0000E+00
7.8362E−03
1.2320E−02
5.9826E−03
−1.3990E−03
−3.3126E−03
9.7793E−04
−4.8003E−04

R7
−1.7949E+01
−1.1108E−01
−8.9573E−03
−1.2379E−02
7.6716E−03
6.4451E−03
9.8063E−04
−1.9852E−03

R8
7.9695E+00
−7.4165E−02
−4.5592E−03
4.5077E−04
−8.8776E−04
3.7819E−04
0.0000E+00
0.0000E+00

R9
1.0682E+00
2.4635E−03
1.5742E−02
−8.2980E−03
−1.5198E−05
4.3122E−04
0.0000E+00
0.0000E+00

R10
−3.0022E+00
−6.7250E−02
1.9100E−02
−2.0028E−03
5.1946E−04
0.0000E+00
0.0000E+00
0.0000E+00

R11
6.7634E+00
−1.7904E−02
2.5839E−03
9.9502E−05
−6.3952E−05
0.0000E+00
0.0000E+00
0.0000E+00

R12
−1.5148E+00
−2.4751E−03
−2.8845E−04
−5.8687E−05
−1.9799E−05
0.0000E+00
0.0000E+00
0.0000E+00

R13
−6.1767E−01
3.2772E−04
−2.2421E−04
−2.8527E−05
2.4515E−06
0.0000E+00
0.0000E+00
0.0000E+00

R14
−5.4731E+00
−8.1180E−03
2.2836E−03
−1.7165E−04
1.3104E−05
0.0000E+00
0.0000E+00
0.0000E+00

Table 7 and table 8 show the inflexion points and the arrest point design data of the camera optical lens 20 lens in the second embodiment of the present invention.

TABLE 7

inflexion point
inflexion point
inflexion point

number
position 1
position 2

R1
0

R2
0

R3
1
0.665

R4
1
0.185

R5
0

R6
1
1.135

R7
1
0.275

R8
2
0.555
1.275

R9
1
1.445

R10
1
1.305

R11
1
1.905

R12
1
1.525

R13
0

R14
0

TABLE 8

arrest point
arrest point
arrest point

number
position 1
position 2

R1

R2

R3
1
0.955

R4
1
0.315

R5

R6

R7
1
0.465

R8
2
0.965
1.385

R9

R10

R11

R12
1
2.135

R13

R14

FIG. 6 and FIG. 7 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 20 in the second embodiment. FIG. 8 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 20 in the second embodiment.

As shown in Table 13, the second embodiment satisfies the various conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 1.995 mm, the full vision field image height is 2.994 mm, the vision field angle in the diagonal direction is 75.02°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described.

The design information of the camera optical lens 30 in the third embodiment of the present invention is shown in the tables 9 and 10.

TABLE 9

R
d
nd
νd

S1
∞
d0 =
−0.076

R1
1.861
d1 =
0.180
nd1
1.7174
ν1
29.50

R2
1.443
d2 =
0.187

R3
2.034
d3 =
0.575
nd2
1.5445
ν2
55.99

R4
20.110
d4 =
0.030

R5
7.829
d5 =
0.304
nd3
1.8211
ν3
24.06

R6
7.613
d6 =
0.419

R7
12.879
d7 =
0.430
nd4
1.6713
ν4
19.24

R8
4.374
d8 =
0.351

R9
−9.799
d9 =
1.049
nd5
1.5352
ν5
56.12

R10
−1.121
d10 =
0.020

R11
7.602
d11 =
0.472
nd6
1.5352
ν6
56.12

R12
3.254
d12 =
0.100

R13
3.656
d13 =
0.503
nd7
1.5352
ν7
56.12

R14
1.383
d14 =
1.154

R15
∞
d15 =
0.210
ndg
1.5168
νg
64.17

R16
∞
d16 =
0.358

Table 10 shows the aspherical surface data of each lens of the camera optical lens 30 in embodiment 3 of the present invention.

TABLE 10

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
−1.1433E+00
−3.3921E−02
3.6708E−03
1.1011E−02
1.3254E−03
−7.2217E−03
4.1023E−03
0.0000E+00

R2
−1.9759E+00
−1.2046E−02
2.2795E−05
1.4073E−02
6.4461E−03
−1.1365E−02
5.4536E−03
0.0000E+00

R3
−2.9614E+00
−1.1859E−02
−2.4026E−02
−2.1660E−02
−4.8708E−03
8.6948E−03
−1.2485E−02
0.0000E+00

R4
0.0000E+00
−8.2538E−02
−2.0694E−02
−1.2728E−02
2.1983E−03
2.3034E−03
−4.0991E−03
−4.4962E−05

R5
0.0000E+00
−1.6577E−03
8.3551E−03
9.5808E−03
−2.8189E−03
1.4817E−04
5.0534E−04
−1.9513E−04

R6
0.0000E+00
7.8509E−03
1.4499E−02
2.7794E−03
−1.1531E−03
−2.1162E−03
1.7414E−03
9.0920E−05

R7
−5.2563E+01
−1.1268E−01
−9.0970E−03
−1.2748E−02
9.6815E−03
8.2351E−03
1.7519E−03
−1.8599E−03

R8
7.3591E+00
−7.5220E−02
−5.8295E−03
3.4193E−04
−8.9691E−04
4.8793E−04
0.0000E+00
0.0000E+00

R9
1.1828E+01
2.8886E−04
1.5379E−02
−8.7906E−03
−8.6818E−05
4.1899E−04
0.0000E+00
0.0000E+00

R10
−2.9590E+00
−6.7223E−02
1.9120E−02
−2.0130E−03
6.5188E−04
0.0000E+00
0.0000E+00
0.0000E+00

R11
6.3019E+00
−1.6857E−02
2.5475E−03
8.4858E−05
−6.9457E−05
0.0000E+00
0.0000E+00
0.0000E+00

R12
−1.8081E+00
−2.4783E−03
−1.8840E−04
−4.7138E−05
−1.7765E−05
0.0000E+00
0.0000E+00
0.0000E+00

R13
−7.6899E−01
−1.7535E−04
−2.4021E−04
−2.4218E−05
3.1421E−06
0.0000E+00
0.0000E+00
0.0000E+00

R14
−5.9801E+00
−9.8248E−03
2.2341E−03
−1.8083E−04
1.1494E−05
0.0000E+00
0.0000E+00
0.0000E+00

Table 11 and table 12 show the inflexion points and the arrest point design data of the camera optical lens 30 lens in embodiment 3 of the present invention.

TABLE 11

inflexion point
inflexion point
inflexion point

number
position 1
position 2

R1
0

R2
0

R3
1
0.685

R4
1
0.225

R5
0

R6
0

R7
2
0.245
1.055

R8
2
0.545
1.305

R9
0

R10
1
1.285

R11
1
1.695

R12
1
1.615

R13
0

R14
0

TABLE 12

arrest point
arrest point
arrest point

number
position 1
position 2

R1

R2

R3

R4
1
0.373

R5

R6

R7
1
0.405

R8
1
0.935

R9

R10

R11
1
2.085

R12
1
2.275

R13

R14

FIG. 10 and FIG. 11 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 30 in the third embodiment. FIG. 12 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 30 in the third embodiment.

The following table 13, in accordance with the above conditions, lists the values in this embodiment corresponding with each condition expression. Apparently, the camera optical system of this embodiment satisfies the above conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 1.963 mm, the full vision field image height is 2.994 mm, the vision field angle in the diagonal direction is 74.99°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

TABLE 13

Embodi-
Embodi-
Embodi-

ment 1
ment 2
ment 3

f
3.907
4.089
4.024

f1
−7.624
−4.784
−10.859

f2
4.307
3.759
4.096

f3
21.744
15.817
−919.812

f4
−12.382
−12.088
−9.980

f5
2.489
2.184
2.262

f6
−33.625
−23.953
−11.015

f7
−3.431
−3.422
−4.491

f6/f7
9.8
7.000
2.453

(R1 + R2)/(R1 − R2)
5.023
3.000
7.902

(R3 + R4)/(R3 − R4)
−1.039
−1.132
−1.225

(R5 + R6)/(R5 − R6)
−34.132
−8.897
71.462

(R7 + R8)/(R7 − R8)
2.382
2.583
2.029

(R9 + R10)/(R9 − R10)
1.257
1.271
1.258

(R11 + R12)/(R11 − R12)
5.265
4.395
2.497

(R13 + R14)/(R13 − R14)
1.762
1.827
2.217

f1/f
−1.951
−1.170
−2.699

f2/f
1.102
0.919
1.018

f3/f
5.565
3.868
−228.586

f4/f
−3.169
−2.956
−2.480

f5/f
0.637
0.534
0.562

f6/f
−8.606
−5.858
−2.737

f7/f
−0.878
−0.837
−1.116

d1
0.180
0.180
0.180

d3
0.426
0.635
0.575

d5
0.304
0.304
0.304

d7
0.366
0.452
0.430

d9
1.049
1.049
1.049

d11
0.554
0.477
0.472

d13
0.634
0.395
0.503

Fno
2.3
2.050
2.050

TTL
5.988
6.652
6.341

d7/TTL
0.061
0.068
0.068

n1
1.7521
1.7174
1.7174

n2
1.5441
1.5445
1.5445

n3
1.7225
1.8211
1.8211

n4
1.6713
1.6713
1.6713

n5
1.5352
1.5352
1.5352

n6
1.5352
1.5352
1.5352

n7
1.5352
1.5352
1.5352

It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.

Number	Date	Country	Kind
201711365755.1	Dec 2017	CN	national
201711365779.7	Dec 2017	CN	national

Camera Optical Lens

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Publication Number

Date Filed

Date Published

Inventors

Original Assignees

CPC

International Classifications

Abstract

Description

Claims

Priority Claims (2)