Camera Optical Lens

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Applications Ser. No. 201810387929.2 and Ser. No. 201810387938.1 filed on Apr. 26, 2018, the entire content of which is incorporated herein by reference.

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 six 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, and a sixth lens L6. Optical element like optical filter GF can be arranged between the sixth lens L6 and the image surface Si.

The first lens L1 is made of plastic material, the second lens L2 is made of glass material, the third lens L3 is made of plastic 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 glass material. The second lens L2 has a negative refractive power and the third lens L3 has a negative refractive power.

Here, the focal length of the camera optical lens 10 is defined as f, the focal length of the first lens is defined as f1, the refractive power of the second lens is defined as n2, the refractive power of the sixth lens is defined as n6, the thickness on-axis of the second lens L2 is defined as d3 and the total optical length of the camera optical lens is defined as TTL. The camera optical lens 10 satisfies the following conditions: 0.5≤f1/f≤5, 1.7≤n2≤2.2, 1.7≤n6≤2.2, 0.03≤d3/TTL≤0.15.

Condition 0.5≤f1/f≤5 fixes the positive refractive power of the first lens L1. If the lower limit of the set value is exceeded, although it benefits the ultra-thin development of lenses, but the positive 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 upper limit of the set value is exceeded, the positive 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, 0.75≤f1/f≤3.09.

Condition 1.7≤n2≤2.2 fixes the refractive power of the second lens L2, 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, 1.754≤n2≤2.062.

Condition 1.7≤n6≤2.2 fixes the refractive power of the sixth lens L6, 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, 1.707≤n6≤1.978.

Condition 0.03≤d3/TTL≤0.15 fixes the ratio between the thickness on-axis d3 of the second lens L2 and the total optical length TTL of the camera optical lens, and it benefits the ultra-thin development of lenses. Preferably, the following condition shall be satisfied, 0.036≤d3/TTL≤0.103.

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 positive refractive power; 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 thickness on-axis of the first lens L1 is defined as d1 and the total optical length of the camera optical lens is defined as TTL, the condition −3.49≤(R1+R2)/(R1−R2)≤−0.97 fixes the shape of the first lens L1, so that the first lens L1 can effectively correct system spherical aberration; when the condition 0.04≤d1/TTL≤0.13 is met, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied: −2.18≤(R1+R2)/(R1−R2)≤−1.21; 0.07≤d1/TTL≤0.11.

In this embodiment, the object side surface of the second lens L2 is a convex surface relative to the proximal axis, and its image side surface is a concave surface relative to the proximal axis; the focal length of the camera optical lens 10 is defined as f, the focal length of the second lens L2 is defined as f2, the curvature radius of the object side surface of the second lens L2 is defined as R3, the curvature radius of image side surface of the second lens L2 is defined as R4, the thickness on-axis of the second lens L2 is defined as d3 and the total optical length of the camera optical lens is defined as TTL, they satisfy the following condition: −10.81≤f2/f≤−2.54, 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 positive refractive power and the field curvature of the system then can be reasonably and effectively balanced; the condition 2.90≤(R3+R4)/(R3−R4)≤14.07 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. Preferably, the following conditions shall be satisfied: −6.75≤f2/f≤−3.17; 4.63≤(R3+R4)/(R3−R4)≤11.26.

In this embodiment, the object side surface of the third lens L3 is a concave surface relative to the proximal axis, and its image side surface is a convex surface relative to the proximal axis; the focal length of the camera optical lens 10 is defined as f, the focal length of the third lens L3 is defined as f3, the curvature radius of the object side surface of the third lens L3 is defined as R5, the curvature radius of the image side surface of the third lens L3 is defined as R6, the thickness on-axis of the third lens L3 is defined as d5 and the total optical length of the camera optical lens is defined as TTL, they satisfy the following condition: −4.10≤f3/f≤−1.27, when the condition is met, the negative refractive power of the third lens L3 is controlled within reasonable scope, the spherical aberration caused by the second lens L2 which has negative refractive power and the field curvature of the system then can be reasonably and effectively balanced; the condition −4.26≤(R5+R6)/(R5−R6)≤−0.88 fixes the shape of the third lens L3, 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; when the condition 0.02≤d5/TTL≤0.07 is met, it is beneficial for the realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied: −2.56≤f3/f≤−2.66≤(R5+R6)/(R5−R6)≤−1.10; 0.03≤d5/TTL≤0.05.

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 convex surface relative to the proximal axis, and it has positive refractive power; the focal length of the camera optical lens 10 is defined as f, the focal length of the fourth lens L4 is defined as f4, the curvature radius of the object side surface of the fourth lens L4 is defined as R7, the curvature radius of the image side surface of the fourth lens L4 is defined as R8, the thickness on-axis of the fourth lens L4 is defined as d7 and the total optical length of the camera optical lens is defined as TTL, they satisfy the condition: 0.80≤f4/f≤3.15, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition −1.21≤(R7+R8)/(R7−R8)≤0.26 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 0.05≤d7/TTL≤0.16 is met, it is beneficial for realization of ultra-thin lenses. Preferably, the following conditions shall be satisfied: 1.28≤f4/f≤2.52; −0.76≤(R7+R8)/(R7−R8)≤0.21; 0.07≤d7/TTL≤0.13.

In this embodiment, the object side surface of the fifth lens L5 is a convex 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 camera optical lens 10 is defined as f, the focal length of the fifth lens L5 is defined as f5, the curvature radius of the object side surface of the fifth lens L5 is defined as R9, the curvature radius of the image side surface of the fifth lens L5 is defined as R10, the thickness on-axis of the fifth lens L5 is defined as d9 and the total optical length of the camera optical lens is defined as TTL, they satisfy the condition: 0.36≤f5/f≤1.22, 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 0.29≤(R9+R10)/(R9−R10)≤1.11 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 0.06≤d9/TTL≤0.19 is met, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied: 0.58≤f5/f≤0.97; 0.47≤(R9+R10)/(R9−R10)≤0.89; 0.09≤d9/TTL≤0.15.

In this embodiment, the object side surface of the sixth lens L6 is a concave 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 camera optical lens 10 is defined as f, the focal length of the sixth lens L6 is defined as f6, the curvature radius of the object side surface of the sixth lens L6 is defined as R11, the curvature radius of the image side surface of the sixth lens L6 is defined as R12, the thickness on-axis of the sixth lens L6 is defined as d11 and the total optical length of the camera optical lens is defined as TTL, they satisfy the condition: −0.99≤f6/f≤−0.31, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity; the condition −1.14≤(R11+R12)/(R11−R12)≤−0.37 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 0.02≤d11/TTL≤0.09, is met, it is beneficial for the realization of ultra-thin lens. Preferably, the following conditions shall be satisfied, −0.62≤f6/f≤−0.39; −0.72≤(R11+R12)/(R11−R12)≤−0.46; 0.04≤d11/TTL≤0.08.

In this embodiment, the focal length of the camera optical lens 10 is defined as f and the combined focal length of the first lens and the second lens is defined as f12, when the condition 0.63≤f12/f≤2.10 is met, the aberration and distortion of the camera lens can be eliminated, and the back focus of the camera lens can be suppressed and the miniaturization characteristics can be maintained. Preferably, the following conditions shall be satisfied: 1.01≤f12/f≤1.68.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.76 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 5.50 mm.

In this embodiment, the aperture F number of the camera optical lens 10 is less than or equal to 2.27. A large aperture has better imaging performance. Preferably, the aperture F number of the camera optical lens 10 is less than or equal to 2.22.

With such design, the total optical length TTL of the 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 focal length, distance on-axis, curvature radius, thickness on-axis, inflexion point position and arrest point position 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 tables 1 and 2.

TABLE 1

R
d
nd
νd

S1
∞
d0 =
−0.220

R1
1.936
d1 =
0.469
nd1
1.5449
ν1
55.93

R2
10.393
d2 =
0.040

R3
5.119
d3 =
0.250
nd2
1.8081
ν2
22.76

R4
3.612
d4 =
0.409

R5
−3.608
d5 =
0.230
nd3
1.6613
ν3
20.37

R6
−9.985
d6 =
0.075

R7
5.966
d7 =
0.519
nd4
1.5352
ν4
56.09

R8
−24.316
d8 =
0.639

R9
12.583
d9 =
0.596
nd5
1.5352
ν5
56.09

R10
−1.881
d10 =
0.767

R11
−1.960
d11 =
0.310
nd6
1.7550
ν6
52.32

R12
7.198
d12 =
0.221

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.500

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 optical filter GF;

R14: 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 optical filter GF;

d13: The thickness on-axis of the optical filter GF;

d14: 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;

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;

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
−2.7441E−01
A4
A6
A8
A10
A12
A14
A16

R2
−5.5137E+02
1.3335E−02
7.4601E−03
−1.3986E−02
1.6960E−02
−4.6455E−03
6.1043E−04
2.0175E−03

R3
−6.6526E+01
−3.1846E−03
−2.7096E−03
2.0416E−02
3.1508E−03
−1.0652E−02
1.9887E−02
−1.6885E−03

R4
2.7735E+00
−2.2706E−02
4.3647E−03
7.8481E−03
1.0181E−02
2.2249E−03
−8.1575E−03
4.8970E−03

R5
6.1039E+00
−5.8704E−02
−9.0464E−03
5.5971E−03
−1.1275E−02
−8.1396E−03
6.9263E−03
−5.7316E−03

R6
5.2676E+01
−7.2872E−03
−7.0496E−02
1.1892E−02
2.5670E−02
−2.9318E−02
−3.9327E−02
3.0422E−02

R7
−1.0703E+02
−6.2679E−02
4.3923E−02
2.2089E−02
−1.3366E−02
3.3341E−03
−4.4474E−03
2.5950E−03

R8
1.4071E+02
−1.1685E−01
5.5579E−02
2.6737E−04
−1.7709E−03
−1.1777E−04
−1.2554E−04
1.1461E−04

R9
0.0000E+00
−1.0504E−01
4.2523E−03
−1.1917E−03
1.2514E−03
−1.1950E−03
4.2055E−04
4.5884E−04

R10
−4.7218E−01
−3.6381E−02
7.2303E−03
−4.8413E−03
6.8216E−04
−7.3411E−05
−1.2855E−05
8.0828E−06

R11
−4.9693E+00
4.6222E−02
4.8394E−03
−1.9065E−03
2.5469E−04
−7.3620E−06
−9.7145E−07
4.9424E−08

R12
4.1971E+00
−3.6566E−02
7.4499E−03
8.2715E−05
−6.6947E−05
−6.2412E−06
1.3001E−06
−4.3445E−08

Among them, K is a conic index, A4, A6, A8, A10, A12, A14, A6 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, P1R1 and P1R2 represent respectively the object side surface and image side surface of the first lens L1, P2R1 and P2R2 represent respectively the object side surface and image side surface of the second lens L2, P3R1 and P3R2 represent respectively the object side surface and image side surface of the third lens L3, P4R1 and P4R2 represent respectively the object side surface and image side surface of the fourth lens L4, P5R1 and P5R2 represent respectively the object side surface and image side surface of the fifth lens L5, P6R1 and P6R2 represent respectively the object side surface and image side surface of the sixth lens L6. 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

P1R1
0

P1R2
0

P2R1
0

P2R2
1
0.635

P3R1
0

P3R2
1
0.795

P4R1
2
0.315
0.945

P4R2
1
1.215

P5R1
2
0.445
1.825

P5R2
2
1.075
1.995

P6R1
1
1.555

P6R2
2
0.615
3.025

TABLE 4

arrest point
arrest point
arrest point

number
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
1
0.935

P3R1
0

P3R2
1
1.095

P4R1
2
0.575
1.165

P4R2
0

P5R1
1
0.775

P5R2
0

P6R1
0

P6R2
1
1.125

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 1.941 mm, the full vision field image height is 3.918 mm, the vision field angle in the diagonal direction is 84.65°, 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 =
−0.230

R1
1.967
d1 =
0.460
nd1
1.5449
ν1
55.93

R2
9.010
d2 =
0.040

R3
5.131
d3 =
0.216
nd2
1.8467
ν2
23.78

R4
3.843
d4 =
0.406

R5
−4.003
d5 =
0.230
nd3
1.6713
ν3
19.24

R6
−12.637
d6 =
0.081

R7
5.853
d7 =
0.485
nd4
1.5352
ν4
56.09

R8
−19.093
d8 =
0.680

R9
10.495
d9 =
0.604
nd5
1.5352
ν5
56.09

R10
−2.021
d10 =
0.759

R11
−1.979
d11 =
0.330
nd6
1.7292
ν6
54.68

R12
6.961
d12 =
0.233

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.500

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
−2.1198E−01
1.2223E−02
8.6080E−03
−1.6711E−02
1.8724E−02
−4.3302E−03
−1.9495E−03
3.0442E−03

R2
−4.1194E+02
−9.8746E−03
−2.9976E−03
2.9985E−02
−8.7876E−04
−1.0958E−02
1.2980E−02
−1.6897E−04

R3
−7.4694E+01
−3.1150E−02
5.5428E−03
1.9274E−02
9.9069E−03
−5.2027E−03
−7.6277E−03
4.5300E−03

R4
1.2675E+00
−5.9321E−02
3.1260E−03
1.1638E−02
−1.0591E−02
−7.3610E−03
7.7111E−03
−5.5357E−03

R5
1.1475E+01
−1.3746E−02
−3.8780E−02
−5.5419E−03
2.7582E−02
−1.3510E−02
−3.2558E−02
2.7609E−02

R6
8.9584E+01
−6.4278E−02
3.2297E−02
1.9087E−02
−1.6106E−02
4.5135E−03
−2.7519E−03
2.1876E−03

R7
−5.6517E+01
−1.1542E−01
5.3499E−02
−3.1241E−03
−2.7471E−03
1.0103E−04
5.6029E−04
1.1332E−05

R8
1.0813E+02
−9.1668E−02
−1.2228E−03
1.9024E−03
1.9573E−03
−1.0888E−03
−6.8364E−05
5.8200E−04

R9
0.0000E+00
−3.2781E−02
5.3805E−03
−3.7990E−03
4.3697E−04
−5.9985E−05
−1.3391E−05
6.7622E−06

R10
−3.6801E−01
4.2269E−02
4.1181E−03
−1.9043E−03
2.6861E−04
−2.1025E−06
2.9616E−08
−2.0432E−07

R11
−4.6077E+00
−4.0514E−02
7.7484E−03
9.7359E−05
−6.5294E−05
−6.8323E−06
1.4109E−06
−5.2073E−08

R12
3.8237E+00
−3.5975E−02
3.9160E−03
−2.6871E−04
4.2614E−06
−4.4022E−06
8.1034E−07
−4.0250E−08

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

P1R1
0

P1R2
0

P2R1
0

P2R2
1
0.675

P3R1
0

P3R2
1
0.945

P4R1
2
0.335
1.025

P4R2
1
1.195

P5R1
1
0.515

P5R2
2
1.135
2.075

P6R1
1
1.605

P6R2
2
0.635
3.035

TABLE 8

arrest
arrest
arrest

point number
point position 1
point position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
1
0.985

P3R1
0

P3R2
0

P4R1
2
0.625
1.225

P4R2
0

P5R1
1
0.885

P5R2
0

P6R1
0

P6R2
1
1.145

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 1.936 mm, the full vision field image height is 3.918 mm, the vision field angle in the diagonal direction is 84.66°, 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 =
−0.180

R1
1.991
d1 =
0.440
nd1
1.5449
ν1
55.93

R2
7.350
d2 =
0.035

R3
4.057
d3 =
0.290
nd2
1.9229
ν2
18.90

R4
3.276
d4 =
0.382

R5
−4.549
d5 =
0.220
nd3
1.6713
ν3
19.24

R6
−32.826
d6 =
0.036

R7
8.399
d7 =
0.574
nd4
1.5352
ν4
56.09

R8
−5.945
d8 =
0.731

R9
8.442
d9 =
0.675
nd5
1.5352
ν5
56.09

R10
−2.210
d10 =
0.793

R11
−1.896
d11 =
0.230
nd6
1.7130
ν6
53.87

R12
6.584
d12 =
0.115

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.500

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
−2.1221E−01
9.4342E−03
1.0623E−02
−2.3677E−02
1.9546E−02
−2.8426E−03
−6.2988E−03
3.5060E−03

R2
−1.3916E+02
−5.2139E−03
−8.2409E−03
1.7046E−02
5.4680E−03
−2.5878E−03
2.0781E−03
9.5896E−04

R3
−1.1033E+01
−2.4471E−02
1.2469E−02
1.2509E−02
4.7338E−03
2.9208E−03
−1.7142E−03
4.4822E−03

R4
5.1177E+00
−3.7508E−02
−1.6926E−02
2.5872E−03
−5.0153E−04
−4.4679E−03
−9.4889E−03
9.7560E−03

R5
1.2627E+01
−1.5385E−02
−6.8074E−02
1.6074E−03
1.1445E−02
−4.1369E−02
−4.4489E−02
4.8445E−02

R6
7.0206E+02
−6.6311E−02
3.0036E−02
8.9629E−03
−1.6957E−02
7.1575E−03
−1.7545E−03
2.0878E−03

R7
−1.6911E+02
−1.0347E−01
5.7069E−02
−1.4444E−03
−3.7673E−03
−4.1557E−04
3.7494E−04
1.3885E−04

R8
−3.1008E−01
−7.8297E−02
5.0336E−04
−1.9932E−03
1.1834E−03
−3.0809E−04
3.5085E−04
3.1240E−04

R9
−7.2344E+01
−2.1768E−02
4.5853E−03
−2.8746E−03
3.2458E−04
−3.9633E−05
−5.3280E−06
2.6888E−06

R10
−3.7356E−01
2.8765E−02
4.9999E−03
−1.8282E−03
2.4143E−04
−3.6209E−06
−2.1435E−07
−1.1305E−07

R11
−3.8772E+00
−3.8895E−02
7.6139E−03
1.1372E−04
−6.5318E−05
−7.7701E−06
1.5888E−06
−6.1797E−08

R12
3.1430E+00
−3.5280E−02
4.1628E−03
−3.2102E−04
7.8129E−06
−3.9590E−06
7.2384E−07
−3.5774E−08

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

P1R1
0

P1R2
0

P2R1
0

P2R2
2
0.865
0.945

P3R1
0

P3R2
1
0.995

P4R1
2
0.295
0.935

P4R2
1
1.215

P5R1
1
0.585

P5R2
2
1.245
2.225

P6R1
1
1.595

P6R2
2
0.665
3.105

TABLE 12

arrest point
arrest point
arrest point

number
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
0

P3R2
1
1.155

P4R1
2
0.535
1.165

P4R2
0

P5R1
1
1.015

P5R2
0

P6R1
0

P6R2
1
1.225

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 1.959 mm, the full vision field image height is 3.918 mm, the vision field angle in the diagonal direction is 86.78°, 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

Embodiment

Embodiment

1
Embodiment 2
3

f
4.271
4.260
4.114

f1
4.268
4.500
4.855

f2
−16.269
−19.447
−22.230

f3
−8.589
−8.740
−7.817

f4
8.976
8.400
6.575

f5
3.092
3.210
3.336

f6
−2.004
−2.074
−2.035

f12
5.378
5.516
5.760

(R1 + R2)/(R1 − R2)
−1.458
−1.559
−1.743

(R3 + R4)/(R3 − R4)
5.791
6.967
9.382

(R5 + R6)/(R5 − R6)
−2.131
−1.927
−1.322

(R7 + R8)/(R7 − R8)
−0.606
−0.531
0.171

(R9 + R10)/(R9 − R10)
0.740
0.677
0.585

(R11 + R12)/(R11 − R12)
−0.572
−0.557
−0.553

f1/f
0.999
1.056
1.180

f2/f
−3.810
−4.565
−5.404

f3/f
−2.011
−2.051
−1.900

f4/f
2.102
1.972
1.598

f5/f
0.724
0.754
0.811

f6/f
−0.469
−0.487
−0.495

f12/f
1.259
1.295
1.400

d1
0.469
0.460
0.440

d3
0.250
0.216
0.290

d5
0.230
0.230
0.220

d7
0.519
0.485
0.574

d9
0.596
0.604
0.675

d11
0.310
0.330
0.230

Fno
2.200
2.200
2.100

TTL
5.235
5.234
5.231

d1/TTL
0.090
0.088
0.084

d3/TTL
0.048
0.041
0.055

d5/TTL
0.044
0.044
0.042

d7/TTL
0.099
0.093
0.110

d9/TTL
0.114
0.115
0.129

d11/TTL
0.059
0.063
0.044

n1
1.5449
1.5449
1.5449

n2
1.8081
1.8467
1.9229

n3
1.6613
1.6713
1.6713

n4
1.5352
1.5352
1.5352

n5
1.5352
1.5352
1.5352

n6
1.7550
1.7292
1.7130

v1
55.9299
55.9299
55.9299

v2
22.7608
23.7779
18.8969

v3
20.3729
19.2429
19.2429

v4
56.0934
56.0934
56.0934

v5
56.0934
56.0934
56.0934

v6
52.3214
54.6800
53.8671

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.

Claims

1. A camera optical lens comprising, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens; wherein the second lens has a negative refractive power, the third lens has a negative refractive power; the camera optical lens further satisfies the following conditions: 0.5≤f1/f≤5;1.7≤n2≤2.2;1.7≤n6≤2.2;0.03≤d3/TTL≤0.15; wheref: the focal length of the camera optical lens;f1: the focal length of the first lens;n2: the refractive power of the second lens;n6: the refractive power of the sixth lens;d3: the thickness on-axis of the second lens;TTL: the total optical length of the camera optical lens.
2. The camera optical lens as described in claim 1, wherein the first lens is made of plastic material, the second lens is made of glass material, the third lens is made of plastic material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, the sixth lens is made of glass material.
3. The camera optical lens as described in claim 1, wherein the camera optical lens further satisfies the following conditions: 0.75≤f1/f≤3.09;1.754≤n2≤2.062;1.707≤n6≤1.978;0.036≤d3/TTL≤0.103; wheren2: the refractive power of the second lens;n6: the refractive power of the sixth lens;d3: the thickness on-axis of the second lens;TTL: the total optical length of the camera optical lens.
4. The camera optical lens as described in claim 1, wherein the first lens has a positive refractive power with a convex object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions: −3.49≤(R1+R2)/(R1−R2)≤−0.97;0.04≤d1/TTL≤0.13; whereR1: the curvature radius of object side surface of the first lens;R2: the curvature radius of image side surface of the first lens;d1: the thickness on-axis of the first lens;TTL: the total optical length of the camera optical lens.
5. The camera optical lens as described in claim 4, wherein the camera optical lens further satisfies the following conditions: −2.18≤(R1+R2)/(R1−R2)≤−1.21;0.07≤d1/TTL≤0.11; whereR1: the curvature radius of object side surface of the first lens;R2: the curvature radius of image side surface of the first lens;d1: the thickness on-axis of the first lens;TTL: the total optical length of the camera optical lens.
6. The camera optical lens as described in claim 1, wherein the second lens has a convex object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions: −10.81≤f2/f≤−2.54;2.90≤(R3+R4)/(R3−R4)≤14.07; wheref: the focal length of the camera optical lens;f2: the focal length of the second lens;R3: the curvature radius of the object side surface of the second lens;R4: the curvature radius of the image side surface of the second lens.
7. The camera optical lens as described in claim 6, wherein the camera optical lens further satisfies the following conditions: −6.75≤f2/f≤−3.17;4.63≤(R3+R4)/(R3−R4)≤11.26; wheref: the focal length of the camera optical lens;f2: the focal length of the second lens;R3: the curvature radius of the object side surface of the second lens;R4: the curvature radius of the image side surface of the second lens.
8. The camera optical lens as described in claim 1, wherein the third lens has a concave object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions: −4.10≤f3/f≤−1.27;−4.26≤(R5+R6)/(R5−R6)≤−0.88;0.02≤d5/TTL≤0.07; wheref: the focal length of the camera optical lens;f3: the focal length of the third lens;R5: the curvature radius of the object side surface of the third lens;R6: the curvature radius of the image side surface of the third lens;d5: the thickness on-axis of the third lens;TTL: the total optical length of the camera optical lens.
9. The camera optical lens as described in claim 8, wherein the camera optical lens further satisfies the following conditions: −2.56≤f3/f≤−1.58;−2.66≤(R5+R6)/(R5−R6)≤−1.10;0.03≤d5/TTL≤0.05; wheref: the focal length of the camera optical lens;f3: the focal length of the third lens;R5: the curvature radius of the object side surface of the third lens;R6: the curvature radius of the image side surface of the third lens;d5: the thickness on-axis of the third lens;TTL: the total optical length of the camera optical lens.
10. The camera optical lens as described in claim 1, wherein the fourth lens has a positive refractive power with a convex object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions: 0.80≤f4/f≤3.15;−1.21≤(R7+R8)/(R7−R8)≤0.26;0.05≤d7/TTL≤0.16; wheref: the focal length of the camera optical lens;f4: the focal length of the fourth lens;R7: the curvature radius of the object side surface of the fourth lens;R8: the curvature radius of the image side surface of the fourth lens;d7: the thickness on-axis of the fourth lens;TTL: the total optical length of the camera optical lens.
11. The camera optical lens as described in claim 10, wherein the camera optical lens further satisfies the following conditions: 1.28≤f4/f≤2.52;−0.76≤(R7+R8)/(R7−R8)≤0.21;0.07≤d7/TTL≤0.13; wheref: the focal length of the camera optical lens;f4: the focal length of the fourth lens;R7: the curvature radius of the object side surface of the fourth lens;R8: the curvature radius of the image side surface of the fourth lens;d7: the thickness on-axis of the fourth lens;TTL: the total optical length of the camera optical lens.
12. The camera optical lens as described in claim 1, wherein the fifth lens has a positive refractive power with a convex object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions: 0.36≤f5/f≤1.22;0.29≤(R9+R10)/(R9−R10)≤1.11;0.06≤d9/TTL≤0.19; wheref: the focal length of the camera optical lens;f5: the focal length of the fifth lens;R9: the curvature radius of the object side surface of the fifth lens;R10: the curvature radius of the image side surface of the fifth lens;d9: the thickness on-axis of the fifth lens;TTL: the total optical length of the camera optical lens.
13. The camera optical lens as described in claim 12, wherein the camera optical lens further satisfies the following conditions: 0.58≤f5/f≤0.97;0.47≤(R9+R10)/(R9−R10)≤0.89;0.09≤d9/TTL≤0.15; wheref: the focal length of the camera optical lens;f5: the focal length of the fifth lens;R9: the curvature radius of the object side surface of the fifth lens;R10: the curvature radius of the image side surface of the fifth lens;d9: the thickness on-axis of the fifth lens;TTL: the total optical length of the camera optical lens.
14. The camera optical lens as described in claim 1, wherein the sixth lens has a negative refractive power with a concave object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions: −0.99≤f6/f≤−0.31;−1.14≤(R11+R12)/(R11−R12)≤−0.37;0.02≤d11/TTL≤0.09; wheref: the focal length of the camera optical lens;f6: the focal length of the sixth lens;R11: the curvature radius of the object side surface of the sixth lens;R12: the curvature radius of the image side surface of the sixth lens;d11: the thickness on-axis of the sixth lens;TTL: the total optical length of the camera optical lens.
15. The camera optical lens as described in claim 14, wherein the camera optical lens further satisfies the following conditions: −0.62≤f6/f≤−0.39;−0.72≤(R11+R12)/(R11−R12)≤−0.46;0.04≤d11/TTL≤0.08; wheref: the focal length of the camera optical lens;f6: the focal length of the sixth lens;R11: the curvature radius of the object side surface of the sixth lens;R12: the curvature radius of the image side surface of the sixth lens;d11: the thickness on-axis of the sixth lens;TTL: the total optical length of the camera optical lens.
16. The camera optical lens as described in claim 1, wherein the camera optical lens further satisfies the following conditions: 0.63≤f12/f≤2.10; wheref: the focal length of the camera optical lens;f12: the combined focal length of the first lens and the second lens.
17. The camera optical lens as described in claim 16, wherein the camera optical lens further satisfies the following conditions: 1.01≤f12/f≤1.68; wheref: the focal length of the camera optical lens;f12: the combined focal length of the first lens and the second lens.
18. The camera optical lens as described in claim 1, wherein the total optical length TTL of the camera optical lens is less than or equal to 5.76 mm.
19. The camera optical lens as described in claim 18, wherein the total optical length TTL of the camera optical lens is less than or equal to 5.50 mm.
20. The camera optical lens as described in claim 1, wherein the aperture F number of the camera optical lens is less than or equal to 2.27.
21. The camera optical lens as described in claim 20, wherein the aperture F number of the camera optical lens is less than or equal to 2.22.

Priority Claims (2)

Number	Date	Country	Kind
201810387929.2	Apr 2018	CN	national
201810387938.1	Apr 2018	CN	national

Camera Optical Lens

Information

Publication Number

Date Filed

Date Published

Inventors

Original Assignees

CPC

International Classifications

Abstract

Description

Claims

Priority Claims (2)