Camera optical lens

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Applications Ser. No. 201810387546.5 and Ser. No. 201810388556.0 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 6 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 glass material, the second lens L2 is made of plastic 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 glass material, and the sixth lens L6 is made of plastic material.

The second lens L2 has a positive refractive power, and the third lens L3 has a positive refractive power.

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 camera optical lens further satisfies the following condition: 0.5≤f1/f≤10. Condition 0.5≤f1/f≤10 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 L 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 L1 becomes too weak, it is then difficult to develop ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.872≤f1/f≤7.55.

The refractive power of the first lens L1 is defined as n1. Here the following condition should satisfied: 1.7≤n1≤2.2. This condition fixes the refractive power of the first lens L, and 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, 1.705≤n1≤2.15.

The refractive power of the fifth lens L5 is defined as n5. Here the following condition should satisfied: 1.7≤n5≤2.2. This condition fixes the refractive power of the fifth lens L5, and 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, 1.706≤n5≤2.15.

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 first lens L1 has a positive refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The curvature radius of the object side surface of the first lens L1 is defined as R1, the curvature radius of the image side surface of the first lens L1 is defined as R2. The camera optical lens 10 further satisfies the following condition: −18.94≤(R1+R2)/(R1−R2)≤−2.22, which fixes the shape of the first lens L. 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 −11.84≤(R1+R2)/(R1−R2)≤−2.78 shall be satisfied.

The thickness on-axis of the first lens L1 is defined as d1. The following condition: 0.02≤d1/TTL≤0.10 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.04≤d1/TTL≤0.08 shall be satisfied.

In this embodiment, the second lens L2 has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the second lens L2 is f2. The following condition should be satisfied: 0.97≤f2/f≤9.50. When the condition is satisfied, 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. Preferably, the condition 1.55≤f2/f≤7.60 should be satisfied.

The curvature radius of the object side surface of the second lens L2 is defined as R3, the curvature radius of the image side surface of the second lens L2 is defined as R4. The following condition should be satisfied: −5.32≤(R3+R4)/(R3−R4)≤−0.92, which fixes the shape of the second lens L2 and can effectively correct aberration of the camera optical lens. Preferably, the following condition shall be satisfied, −3.33≤(R3+R4)/(R3−R4)≤−1.16.

The thickness on-axis of the second lens L2 is defined as d3. The following condition: 0.05≤d3/TTL≤0.18 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.08≤d3/TTL≤0.15 shall be satisfied.

In this embodiment, the third lens L3 has a convex object side surface relative to the proximal axis and a concave image side 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 following condition −7.06≤f3/f≤−1.50 should be satisfied. When the condition is satisfied, it is beneficial for lens group obtaining a good balance field curvature. Preferably, the condition −4.41≤f3/f≤−1.88 should be satisfied.

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 following condition should be satisfied: 1.55≤(R5+R6)/(R5−R6)≤6.37, by which, the shape of the third lens L3 is fixed, further, it is beneficial for moulding of the third lens L3, and avoiding the surface curvature of the third lens L3 is too large to cause poor preforming and stress generation. Preferably, the following condition shall be satisfied, 2.49≤(R5+R6)/(R5−R6)≤5.10.

In this embodiment, the thickness on-axis of the third lens L3 is defined as d5. The following condition should be satisfied: 0.02≤d5/TTL≤0.08, when the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.04≤d5/TTL≤0.06 shall be satisfied.

In this embodiment, the fourth lens L4 has a positive refractive power with a convex object side surface relative to the proximal axis and a convex image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the fourth lens L4 is f4. The following condition should be satisfied: 0.82≤f4/f≤2.87, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition 1.31≤f4/f≤2.29 should be satisfied.

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 following condition should be satisfied: 0.11≤(R7+R8)/(R7−R8)≤0.42, by which, the shape of the fourth lens L4 is fixed, further, 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 following condition shall be satisfied, 0.18≤(R7+R8)/(R7−R8)≤0.33.

The thickness on-axis of the fourth lens L4 is defined as d7. The following condition: 0.04≤d7/TTL≤0.16 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.07≤d7/TTL≤0.13 shall be satisfied.

In this embodiment, the fifth lens L5 has a negative refractive power with a concave object side surface and a convex image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the fifth lens L5 is f5. The following condition should be satisfied: −3.90≤f5/f≤−0.93, which can effectively smooth the light angles of the camera and reduce the tolerance sensitivity. Preferably, the condition −2.44≤f5/f≤−1.17 should be satisfied.

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 following condition should be satisfied: −4.04≤(R9+R10)/(R9−R10)≤−1.03, by which, the shape of the fifth lens L5 is fixed, further, 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 following condition shall be satisfied, −2.53≤(R9+R10)/(R9−R10)≤−1.29.

The thickness on-axis of the fifth lens L5 is defined as d9. The following condition: 0.03≤d9/TTL≤0.11 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.05≤d9/TTL≤0.09 shall be satisfied.

In this embodiment, the sixth lens L6 has a positive refractive power with a convex object side surface and a concave image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the sixth lens L6 is f6. The following condition should be satisfied: 1.15≤f6/f≤4.88, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition 1.83≤f6/f≤3.90 should be satisfied.

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 following condition should be satisfied: (R11+R12)/(R11−R12)≤−12.44, by which, the shape of the sixth lens L6 is fixed, further, 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 following condition shall be satisfied, (R11+R12)/(R11−R12)≤−15.55.

The thickness on-axis of the sixth lens L6 is defined as d11. The following condition: 0.10≤d11/TTL≤0.33 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.16≤d11/TTL≤0.27 shall be satisfied.

The focal length of the whole camera optical lens 10 is f, the combined focal length of the first lens L and the second lens L2 is f12. The following condition should be satisfied: 0.51≤f12/f≤2.16, which can effectively avoid the aberration and field curvature of the camera optical lens, and can suppress the rear focal length for realizing the ultra-thin lens. Preferably, the condition 0.81≤f12/f≤1.73 should be satisfied.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.64 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 5.38 mm.

In this embodiment, the aperture F number of the camera optical lens is less than or equal to 2.06. A large aperture has better imaging performance. Preferably, the aperture F number of the camera optical lens 10 is less than or equal to 2.02.

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 of the first lens L1 to the image surface).

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 =
−0.204

R1
2.123
d1 =
0.347
nd1
1.7112
ν1
38.00

R2
3.944
d2 =
0.078

R3
4.782
d3 =
0.627
nd2
1.5446
ν2
55.90

R4
16.201
d4 =
0.035

R5
5.241
d5 =
0.230
nd3
1.6286
ν3
23.50

R6
2.690
d6 =
0.189

R7
11.944
d7 =
0.535
nd4
1.6545
ν4
55.80

R8
−6.752
d8 =
0.458

R9
−3.271
d9 =
0.388
nd5
1.7275
ν5
21.40

R10
−15.256
d10 =
0.135

R11
1.537
d11 =
1.017
nd6
1.5121
ν6
55.70

R12
1.545
d12 =
0.442

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.436

Where:

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 L;

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 in the embodiment 1 of the present invention.

TABLE 2

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
1.1021E−01
−0.013887598
−0.002682206
−0.015469144
0.014637598
−0.008370981
0.005474282
−0.00154975

R2
8.6138E+00
−0.011240073
−0.046920316
0.034368839
0.004653032
−0.012456763
0.004565027
−0.001339736

R3
6.6257E+00
0.030763073
−0.028780573
0.011869796
0.041552458
−0.028028993
−0.001779252
0.001384889

R4
−4.2389E+02
−0.027632165
0.016824477
−0.13625319
0.069898957
0.01542758
−0.013103549
0.000792687

R5
2.8175E+00
−0.12525993
−0.000953076
−0.037874847
−0.033442834
0.08685511
−0.031422189
0.00181263

R6
−1.4376E+01
−0.009641973
0.043797352
−0.12989908
0.19645598
−0.12935823
0.032657325
0.000727441

R7
−2.1797E+01
0.001728401
−0.019682043
0.071438661
−0.054175965
−0.003362129
0.023893751
−0.008986578

R8
−1.7962E+02
−0.001404477
−0.076728211
0.12440929
−0.097224797
0.042818235
−0.006516794
−0.000418237

R9
−2.7065E+01
0.14499593
−0.29206891
0.39248167
−0.43926655
0.30488212
−0.11608668
0.017727563

R10
−2.7489E+01
−0.093019618
0.20935475
−0.26305346
0.17427567
−0.065242223
1.27E−02
−9.88E−04

R11
−1.0614E+01
−0.093019618
0.031240475
−0.003323365
8.33448E−07
4.00E−05
2.28E−06
−8.01E−07

R12
−4.5291E+00
−0.13396979
0.015476014
−0.002700396
0.000184651
3.29E−06
−5.87E−07
−1.50E−08

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, 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

P1R2

P2R1
1
1.075

P2R2
1
0.355

P3R1
2
0.365
1.025

P3R2

P4R1
1
1.125

P4R2
1
0.905

P5R1

P5R2

P6R1
2
0.445
1.815

P6R2
1
0.725

TABLE 4

Arrest point
Arrest point
Arrest point

number
position 1
position 2

P1R1

P1R2

P2R1

P2R2
1
0.555

P3R1
2
0.605
1.185

P3R2

P4R1

P4R2
1
1.155

P5R1

P5R2

P6R1
1
0.885

P6R2
1
1.595

FIG. 2 and FIG. 3 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 486 nm, 588 nm and 656 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 588 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 embodiments 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 2.0183 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 82.05°, 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 in embodiment 2 of the present invention.

TABLE 5

R
d
nd
νd

S1
∞
d0 =
−0.167

R1
2.318
d1 =
0.318
nd1
2.1002
ν1
38.00

R2
3.811
d2 =
0.065

R3
7.703
d3 =
0.559
nd2
1.5604
ν2
55.90

R4
16.983
d4 =
0.032

R5
4.567
d5 =
0.232
nd3
1.7525
ν3
23.50

R6
2.826
d6 =
0.177

R7
12.152
d7 =
0.547
nd4
1.6180
ν4
55.80

R8
−7.246
d8 =
0.426

R9
−3.850
d9 =
0.371
nd5
2.0944
ν5
21.40

R10
−11.418
d10 =
0.194

R11
1.440
d11 =
1.021
nd6
1.5098
ν6
55.70

R12
1.602837
d12 =
0.425

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.417

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

c
k
A4
A6
A8
A10
A12
A14
A16

R1
−2.7479E−03
−0.012259852
−0.001635188
−0.014416159
0.015492443
−0.008453394
0.004970619
−0.002886112

R2
8.6438E+00
−0.010237028
−0.045259998
0.033096286
0.002478728
−0.014221174
0.003278532
−0.001406688

R3
2.2023E+01
0.044692593
−0.0291789
0.011048294
0.03971712
−0.031319045
−0.005919943
−0.002612296

R4
−1.7436E+03
−0.03999149
0.001232825
−0.13967642
0.070379225
0.014740211
−0.014919542
0.000114996

R5
−1.5314E−01
−0.13021914
0.002321729
−0.033216454
−0.030448187
0.086982332
−0.031969116
0.002199001

R6
−1.0668E+01
−0.004305134
0.046071244
−0.1320496
0.19569076
−0.12631238
0.033629867
0.000631569

R7
4.9567E+01
0.006789214
−0.018546177
0.072533722
−0.053676607
−0.003298092
0.023701832
−0.00939694

R8
−2.0943E+01
−0.004226972
−0.075054662
0.12496556
−0.097096302
0.042828466
−0.006534831
−0.000451849

R9
−1.2252E+01
0.11104743
−0.29245259
0.39624069
−0.43858062
0.30443105
−0.11624757
0.017754127

R10
4.1979E+01
−0.10335226
0.20960992
−0.26245658
0.17457075
−0.065166787
1.27E−02
−9.95E−04

R11
−1.1182E+01
−0.10335226
0.030726087
−0.003438363
−1.33379E−05
3.94E−05
2.48E−06
−7.08E−07

R12
−4.8348E+00
−0.1293307
0.015734564
−0.00267149
0.000183597
3.26E−06
−6.07E−07
−1.85E−08

Table 7 and table 8 show the inflexion points and the arrest point design data of the camera optical lens 20 lens in embodiment 2 of the present invention.

TABLE 7

Inflexion point
Inflexion point
Inflexion point

number
position 1
position 2

P1R1

P1R2

P2R1
1
0.915

P2R2
1
0.265

P3R1
2
0.375
0.985

P3R2

P4R1
1
1.115

P4R2
1
0.925

P5R1

P5R2

P6R1
2
0.435
1.905

P6R2
1
0.685

TABLE 8

Arrest point
Arrest point
Arrest point

number
position 1
position 2

P1R1

P1R2

P2R1

P2R2
1
0.445

P3R1
2
0.635
1.125

P3R2

P4R1

P4R2
1
1.185

P5R1

P5R2

P6R1
1
0.895

P6R2
1
1.435

FIG. 6 and FIG. 7 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 486 nm, 588 nm and 656 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 588 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 1.9434 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 84.20°, 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.

Table 9 and table 10 show the design data of the camera optical lens in embodiment 3 of the present invention.

TABLE 9

R
d
nd
νd

S1
∞
d0 =
−0.096

R1
2.672
d1 =
0.225
nd1
1.7095
ν1
39.25

R2
3.303
d2 =
0.043

R3
3.829
d3 =
0.497
nd2
1.6937
ν2
75.00

R4
23.616
d4 =
0.040

R5
4.484
d5 =
0.248
nd3
1.5388
ν3
25.00

R6
2.587
d6 =
0.190

R7
9.770
d7 =
0.384
nd4
1.6922
ν4
75.00

R8
−6.139
d8 =
0.677

R9
−3.039
d9 =
0.274
nd5
1.7123
ν5
30.20

R10
−8.985
d10 =
0.158

R11
1.424
d11 =
1.049
nd6
1.5620
ν6
60.49

R12
1.427021
d12 =
0.348

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.367

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
3.9726E−01
−0.028806751
0.003345639
0.004112732
0.020465886
−0.006021953
−0.015783526
−0.023107079

R2
8.9897E+00
−0.008852923
−0.037903196
0.032494304
−0.002530024
−0.022308312
−0.011976885
−0.009834692

R3
7.4799E+00
0.038677078
−0.058913177
−0.021025286
0.023864934
−0.035696133
0.008486555
0.021995096

R4
−1.3124E+03
−0.040188027
−0.004708845
−0.12496616
0.079384796
0.014119574
−0.018844443
0.00846455

R5
4.4295E−01
−0.12855517
0.013499076
−0.031979113
−0.005572974
0.096962429
−0.035159967
−0.006423649

R6
−1.2140E+01
−0.002023773
0.04678062
−0.13478847
0.18052296
−0.1313646
0.038141606
−0.004178326

R7
−6.6369E+01
0.001661282
−0.02015914
0.07204521
−0.053413025
−0.00246228
0.023195411
−0.012134762

R8
−1.1583E+01
0.001301498
−0.072803563
0.12658732
−0.096417208
0.043598027
−0.005925342
1.06688E−05

R9
−3.2213E+01
0.18150628
−0.31153234
0.39290446
−0.43328959
0.30663291
−0.11636927
0.016989767

R10
−1.6542E+03
−0.073061293
0.20952405
−0.26357569
0.1742055
−0.065238063
1.27E−02
−9.88E−04

R11
−5.6524E+00
−0.073061293
0.030802875
−0.003413025
−5.76354E−06
3.96E−05
2.43E−06
−7.31E−07

R12
−2.9003E+00
−0.13390373
0.015456441
−0.002679077
0.000186992
3.49E−06
−5.77E−07
−1.61E−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
Inflexion point

number
position 1
position 2
position 3

P1R1
1
0.825

P1R2

P2R1
2
0.785
0.865

P2R2
2
0.265
1.005

P3R1
3
0.395
0.855
1.155

P3R2
1
0.805

P4R1
1
0.955

P4R2
1
0.835

P5R1
2
0.395
0.675

P5R2
2
0.535
0.795

P6R1
2
0.505
1.915

P6R2
1
0.745

TABLE 12

Arrest point
Arrest point
Arrest point

number
position 1
position 2

P1R1

P1R2

P2R1

P2R2
1
0.425

P3R1
2
0.675
0.965

P3R2
1
1.065

P4R1
1
1.095

P4R2
1
1.075

P5R1

P5R2

P6R1
1
1.015

P6R2
1
1.505

FIG. 10 and FIG. 11 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 486 nm, 588 nm and 656 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 588 nm passes the camera optical lens 30 in the third embodiment.

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

In this embodiment, the pupil entering diameter of the camera optical lens is 1.6851 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 92.36°, 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 1
Embodiment 2
Embodiment 3

f
4.037
3.887
3.370

f1
5.992
4.837
17.176

f2
12.221
24.625
6.521

f3
−9.110E+00
−1.045E+01
−1.189E+01

f4
6.666
7.425
5.501

f5
−5.802
−5.447
−6.572

f6
13.129
8.912
9.515

f12
4.092
4.059
4.846

(R1 + R2)/(R1 − R2)
−3.332
−4.104
−9.471

(R3 + R4)/(R3 − R4)
−1.837
−2.660
−1.387

(R5 + R6)/(R5 − R6)
3.109
4.247
3.728

(R7 + R8)/(R7 − R8)
0.278
0.253
0.228

(R9 + R10)/
−1.546
−2.017
−2.022

(R9 − R10)

(R11 + R12)/
−3.524E+02
−18.656
−1.021E+03

(R11 − R12)

f1/f
1.484
1.244
5.097

f2/f
3.028
6.335
1.935

f3/f
−2.257E+00
−2.689E+00
−3.529E+00

f4/f
1.651
1.910
1.632

f5/f
−1.437
−1.401
−1.950

f6/f
3.252
2.293
2.823

f12/f
1.014
1.044
1.438

d1
0.347
0.318
0.225

d3
0.627
0.559
0.497

d5
0.230
0.232
0.248

d7
0.535
0.547
0.384

d9
0.388
0.371
0.274

d11
1.017
1.021
1.049

Fno
2.000
2.000
2.000

TTL
5.128
4.995
4.711

d1/TTL
0.068
0.064
0.048

d3/TTL
0.122
0.112
0.106

d5/TTL
0.045
0.046
0.053

d7/TTL
0.104
0.110
0.082

d9/TTL
0.076
0.074
0.058

d11/TTL
0.198
0.204
0.223

n1
1.7112
2.1002
1.7095

n2
1.5446
1.5604
1.6937

n3
1.6287
1.7525
1.5388

n4
1.6545
1.6180
1.6922

n5
1.7275
2.0944
1.7123

n6
1.5121
1.5098
1.5620

v1
38.0000
38.0000
39.2524

v2
55.9000
55.9000
75.0003

v3
23.5000
23.5000
24.9990

v4
55.8000
55.8000
75.0009

v5
21.4000
21.4000
30.2047

v6
55.7000
55.7000
60.4904

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 having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens, and a sixth lens; wherein the camera optical lens further satisfies the following conditions: 0.5≤f1/f≤10;1.7≤n1≤2.2;1.7≤n5≤2.2;1.31≤f4/f≤2.29;0.18≤(R7+R8)/(R7−R8)≤0.33;0.07≤d7/TTL≤0.13.wheref: the focal length of the camera optical lens;f1: the focal length of the first lens;n1: the refractive power of the first lens;n5: the refractive power of the fifth 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: optical length.
2. The camera optical lens as described in claim 1, wherein the first lens is made of glass material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of plastic material, the fifth lens is made of glass material, the sixth lens is made of plastic material.
3. The camera optical lens as described in claim 1 further satisfying the following conditions: 0.872≤f1/f≤7.55;1.705≤n1≤2.15;1.706≤n5≤2.15.
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: −18.94≤(R1+R2)/(R1−R2)≤−2.22;0.02≤d1/TTL≤0.10; 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: optical length.
5. The camera optical lens as described in claim 4 further satisfying the following conditions: −11.84≤(R1+R2)/(R1−R2)≤−2.78;0.04≤d1/TTL≤0.08.
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: 0.97≤f2/f≤9.50;−5.32≤(R3+R4)/(R3−R4)≤−0.92;0.05≤d3/TTL≤0.18; 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;d3: the thickness on-axis of the second lens;TTL: optical length.
7. The camera optical lens as described in claim 6 further satisfying the following conditions: 1.55≤f2/f≤7.60;−3.33≤(R3+R4)/(R3−R4)≤−1.16;0.08≤d3/TTL≤0.15.
8. The camera optical lens as described in claim 1, wherein the third lens has a convex object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions: −7.06≤f3/f≤−1.50;1.55≤(R5+R6)/(R5−R6)≤6.37;0.02≤d5/TTL≤0.08; 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: optical length.
9. The camera optical lens as described in claim 8 further satisfying the following conditions: −4.41≤f3/f≤−1.88;2.49≤(R5+R6)/(R5−R6)≤5.10;0.04≤d5/TTL≤0.06.
10. The camera optical lens as described in claim 1, wherein the fifth lens has a negative refractive power with a concave object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions: −3.90≤f5/f≤−0.93;−4.04≤(R9+R10)/(R9−R10)≤−1.03;0.03≤d9/TTL≤0.11; 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: optical length.
11. The camera optical lens as described in claim 10 further satisfying the following conditions: −2.44≤f5/f≤−1.17;−2.53≤(R9+R10)/(R9−R10)≤−1.29;0.05≤d9/TTL≤0.09.
12. The camera optical lens as described in claim 1, wherein the sixth 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: 1.15≤f6/f≤4.88;(R11+R12)/(R11−R12)≤−12.44;0.10≤d11/TTL≤0.33; 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: optical length.
13. The camera optical lens as described in claim 12 further satisfying the following conditions: 1.83≤f6/f≤3.90;(R11+R12)/(R11−R12)≤−15.55;0.16≤d11/TTL≤0.27.
14. The camera optical lens as described in claim 1 further satisfying the following condition: 0.51≤f12/f≤2.16; wheref12: the combined focal length of the first lens and the second lens;f: the focal length of the camera optical lens.
15. The camera optical lens as described in claim 14 further satisfying the following condition: 0.81≤f12/f≤1.73.
16. 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 5.64 mm.
17. The camera optical lens as described in claim 16, wherein the total optical length TTL of the camera optical lens is less than or equal to 5.38 mm.
18. 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 2.06.
19. The camera optical lens as described in claim 18, wherein the aperture F number of the camera optical lens is less than or equal to 2.02.

Priority Claims (2)

Number	Date	Country	Kind
201810387546.5	Apr 2018	CN	national
201810388556.0	Apr 2018	CN	national

US Referenced Citations (4)

Number	Name	Date	Kind
10156705	Teraoka	Dec 2018	B1
10451845	Yan	Oct 2019	B2
10539761	Sato	Jan 2020	B2
20190121072	Zhao	Apr 2019	A1

Related Publications (1)

	Number	Date	Country
	20190331894 A1	Oct 2019	US

Camera optical lens

Information

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Inventors

Original Assignees

Examiners

Agents

CPC

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US

CPC

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Disclaimer

Term Extension

Abstract

Description

Claims

Priority Claims (2)

US Referenced Citations (4)

Related Publications (1)