Camera optical lens

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Applications Ser. No. 201810203738.6 and Ser. No. 201810203693.2 filed on Mar. 13, 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 to 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 plastic 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 10 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 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 L1 becomes too weak, it is then difficult to develop ultra-thin lenses. Preferably, the following condition shall be satisfied, 1.125≤f1/f≤7.995.

The refractive index of the fifth lens L5 is defined as n5. Here the following condition should be satisfied: 1.7≤n5≤2.2. This condition fixes the refractive index of the fifth lens L5, and refractive index 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, 1.704≤n5≤2.1.

The thickness on-axis of the fifth lens L5 is defined as d9, and the total optical length of the camera optical lens 10 is defined as TTL. The following condition: 0.01≤d9/TTL≤0.2 should be satisfied. This condition fixes the ratio between the thickness on-axis of the fifth lens L5 and the total optical length TTL. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.0275≤d9/TTL≤0.132 shall be satisfied.

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: −30.87≤(R1+R2)/(R1−R2)≤−3.57, by which, the shape of the first lens L1 can be reasonably controlled and it is effectively for correcting spherical aberration of the camera optical lens. Preferably, the condition −19.29≤(R1+R2)/(R1−R2)≤−4.47 shall be satisfied.

The thickness on-axis of the first lens L1 is defined as d1. The following condition: 0.13≤d1≤0.62 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.21≤d1≤0.5 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: 0.8≤f2/f≤4.64, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition 1.27≤f2/f≤3.71 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: −6.12≤(R3+R4)/(R3−R4)≤−1.11, which fixes the shape of the second lens L2 and when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like chromatic aberration of the on-axis is difficult to be corrected. Preferably, the following condition shall be satisfied, −3.83≤(R3+R4)/(R3−R4)≤−1.39.

The thickness on-axis of the second lens L2 is defined as d3. The following condition: 0.21≤d3≤0.71 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.33≤d3≤0.57 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 thickness on-axis of the third lens L3 is defined as d5. The following condition: 0.12≤d5≤0.39 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.19≤d5≤0.31 shall be satisfied.

In this embodiment, the fourth lens L4 has a positive refractive power with a concave 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: 0.51≤f4/f≤1.59, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition 0.81≤f4/f≤1.27 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: 1.61≤(R7+R8)/(R7−R8)≤5.03, by which, the shape of the fourth lens L4 is fixed, further, when 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 following condition shall be satisfied, 2.58≤(R7+R8)/(R7−R8)≤4.02.

The thickness on-axis of the fourth lens L4 is defined as d7. The following condition: 0.28≤d7≤0.86 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.45≤d7≤0.69 shall be satisfied.

In this embodiment, the fifth lens L5 has a negative refractive power with a concave 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 fifth lens L5 is f5. The following condition should be satisfied: −1.93≤f5/f≤−0.53, which can effectively smooth the light angles of the camera and reduce the tolerance sensitivity. Preferably, the condition −1.21≤f5/f≤−0.66 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: −5.51≤(R9+R10)/(R9−R10)≤−1.49, by which, the shape of the fifth lens L5 is fixed, further, when 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 following condition shall be satisfied, −3.45≤(R9+R10)/(R9−R10)≤−1.87.

The thickness on-axis of the fifth lens L5 is defined as d9. The following condition: 0.13≤d9≤0.52 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.20≤d9≤0.42 shall be satisfied.

In this embodiment, the sixth lens L6 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 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: 1.00≤f6/f≤4.2, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition 1.595≤f6/f≤3.36 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: −94.45≤(R11+R12)/(R11−R12)≤−18.52, by which, the shape of the sixth lens L6 is fixed, further, when 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 following condition shall be satisfied, −59.03≤(R11+R12)/(R11−R12)≤−23.15.

The thickness on-axis of the sixth lens L6 is defined as d11. The following condition: 0.44≤d11≤1.42 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.71≤d11≤1.14 shall be satisfied.

The focal length of the whole camera optical lens 10 is f, the combined focal length of the first lens L1 and the second lens L2 is f12. The following condition should be satisfied: 0.575≤f12/f≤1.96, 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 0.91≤f12/f≤1.57 should be satisfied.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 6.06 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 5.79 mm.

In this embodiment, the aperture F number of the camera optical lens 10 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 2s 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
vd

S1
∞
d0=
−0.306

R1
1.853
d1=
0.415
nd1
1.6806
v1
56.30

R2
2.682
d2=
0.263

R3
3.414
d3=
0.414
nd2
1.5140
v2
56.80

R4
6.727
d4=
0.271

R5
139.345
d5=
0.258
nd3
1.6515
v3
20.50

R6
139.243
d6=
0.209

R7
−3.010
d7=
0.558
nd4
1.7057
v4
55.02

R8
−1.627
d8=
0.079

R9
−1.538
d9=
0.261
nd5
1.7092
v5
25.60

R10
−3.880
d10=
0.270

R10
1.562
d11=
0.948
nd6
1.5418
v6
35.34

R12
1.630
d12=
0.683

R13
∞
d13=
0.210
ndg
1.5168
vg
64.17

R14
∞
d14=
0.667

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 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 index of the d line;

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

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

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

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

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

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

ndg: The refractive power refractive index 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
5.37E−01
−1.01E−02
8.45E−03
−1.23E−02
1.35E−02
−9.64E−03
3.24E−03
−3.65E−04

R2
8.95E−01
−9.09E−03
−1.25E−03
3.68E−03
−7.47E−04
−8.41E−03
6.68E−03
−2.44E−03

R3
−1.78E+01
1.23E−02
−4.45E−02
−1.43E−03
3.49E−02
−6.49E−02
3.16E−02
−4.74E−03

R4
7.58E+00
−5.59E−02
−3.67E−02
−3.25E−02
5.44E−02
−6.10E−02
2.49E−02
−7.76E−04

R5
0.00E+00
−7.68E−02
−4.30E−02
−5.39E−02
−5.60E−03
2.63E−02
3.11E−03
−2.44E−03

R6
0.00E+00
−4.33E−02
4.71E−02
−1.42E−01
1.50E−01
−8.76E−02
2.09E−02
9.04E−04

R7
3.91E+00
−3.12E−02
3.60E−02
6.69E−02
−5.70E−02
−1.14E−02
2.20E−02
−4.20E−03

R8
−2.72E−01
1.03E−02
−3.81E−02
5.52E−02
−3.71E−02
1.61E−02
−2.52E−03
1.64E−04

R9
−4.86E+00
1.89E−02
−1.90E−01
3.64E−01
−4.35E−01
3.04E−01
−1.11E−01
1.60E−02

R10
−3.91E+00
−1.58E−01
2.43E−01
−2.57E−01
1.71E−01
−6.39E−02
1.23E−02
−9.64E−04

R11
−9.39E+00
−1.58E−01
3.10E−02
−2.02E−03
−2.74E−04
1.15E−05
7.23E−06
−6.54E−07

R12
−4.12E+00
−1.13E−01
1.70E−02
−2.94E−03
3.05E−04
−1.68E−05
4.43E−07
−9.15E−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, 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
Inflexion point

number
position 1
position 2
position3

P1R1
0

P1R2
1
1.025

P2R1
1
0.635

P2R2
1
0.425

P3R1
2
0.095
1.135

P3R2
2
0.125
1.165

P4R1
2
1.115
1.295

P4R2
1
1.125

P5R1
1
1.395

P5R2
2
1.115
1.525

P6R1
3
0.485
1.525
2.225

P6R2
1
0.745

TABLE 4

Arrest point
Arrest point
Arrest point
Arrest point

number
position 1
position 2
position 3

P1R1
0

P1R2
0

P2R1
1
0.935

P2R2
1
0.665

P3R1
1
0.155

P3R2
1
0.215

P4R1
0

P4R2
1
1.395

P5R1
0

P5R2
0

P6R1
3
1.045
2.155
2.275

P6R2
1
1.745

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 2.092 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 80.03°, 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
Nd

S1
∞
d0=
−0.304

R1
1.845
d1=
0.413
nd1
1.6683
v1
56.30

R2
2.692
d2=
0.260

R3
3.281
d3=
0.415
nd2
1.5140
v2
56.80

R4
6.615
d4=
0.280

R5
83.557
d5=
0.235
nd3
1.6390
v3
20.50

R6
83.465
d6=
0.216

R7
−3.000
d7=
0.563
nd4
1.7057
v4
52.68

R8
−1.611
d8=
0.078

R9
−1.642
d9=
0.250
nd5
2.0025
v5
25.60

R10
−3.511
d10=
0.266

R11
1.464
d11=
0.935
nd6
1.6018
v6
35.24

R12
1.572827
d12=
0.703

R13
∞
d13=
0.210
ndg
1.5168
vg
64.17

R14
∞
d14=
0.687

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
5.32E−01
−1.04E−02
8.25E−03
−1.25E−02
1.34E−02
−9.69E−03
3.22E−03
−3.65E−04

R2
8.58E−01
−9.32E−03
−1.86E−03
3.61E−03
−7.09E−04
−8.40E−03
6.64E−03
−2.50E−03

R3
−1.67E+01
1.28E−02
−4.53E−02
−2.15E−03
3.45E−02
−6.51E−02
3.15E−02
−4.73E−03

R4
5.30E+00
−5.75E−02
−3.70E−02
−3.24E−02
5.45E−02
−6.10E−02
2.49E−02
−8.21E−04

R5
0.00E+00
−7.94E−02
−4.35E−02
−5.38E−02
−5.42E−03
2.64E−02
3.23E−03
−2.35E−03

R6
0.00E+00
−4.12E−02
4.79E−02
−1.42E−01
1.49E−01
−8.77E−02
2.09E−02
8.80E−04

R7
3.97E+00
−2.95E−02
3.58E−02
6.68E−02
−5.69E−02
−1.13E−02
2.21E−02
−4.17E−03

R8
−2.68E−01
1.10E−02
−3.89E−02
5.49E−02
−3.71E−02
1.61E−02
−2.48E−03
1.88E−04

R9
−4.27E+00
1.94E−02
−1.87E−01
3.65E−01
−4.35E−01
3.04E−01
−1.11E−01
1.60E−02

R10
−4.09E+00
−1.60E−01
2.42E−01
−2.57E−01
1.71E−01
−6.39E−02
1.23E−02
−9.64E−04

R11
−8.99E+00
−1.60E−01
3.09E−02
−2.02E−03
−2.71E−04
1.18E−05
7.23E−06
−6.61E−07

R12
−4.51E+00
−1.13E−01
1.70E−02
−2.94E−03
3.06E−04
−1.68E−05
4.41E−07
−9.47E−09

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
Inflexion point

number
position 1
position 2
position3

P1R1
0

P1R2
1
1.015

P2R1
1
0.635

P2R2
1
0.415

P3R1
2
0.115
1.125

P3R2
2
0.165
1.175

P4R1
2
1.115
1.275

P4R2
1
1.125

P5R1
1
1.395

P5R2
2
1.165
1.465

P6R1
3
0.485
1.535
2.245

P6R2
1
0.725

TABLE 8

Arrest point
Arrest point
Arrest point
Arrest point

number
position 1
position 2
position 3

P1R1
0

P1R2
0

P2R1
1
0.935

P2R2
1
0.665

P3R1
1
0.195

P3R2
1
0.285

P4R1
0

P4R2
1
1.395

P5R1
0

P5R2
0

P6R1
3
1.055
2.175
2.295

P6R2
1
1.715

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 2.086 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 80.18°, 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 30 in embodiment 3 of the present invention.

TABLE 9

R
d
nd
Nd

S1
∞
d0=
−0.233

R1
1.971
d1=
0.265
nd1
1.5187
v1
56.30

R2
2.244
d2=
0.120

R3
2.459
d3=
0.472
nd2
1.5140
v2
56.80

R4
9.850
d4=
0.307

R5
15.282
d5=
0.241
nd3
1.5397
v3
22.85

R6
15.197
d6=
0.249

R7
−3.053
d7=
0.575
nd4
1.7057
v4
70.00

R8
−1.609
d8=
0.086

R9
−1.562
d9=
0.347
nd5
1.7099
v5
25.60

R10
−4.084
d10=
0.216

R11
1.321
d11=
0.887
nd6
1.5408
v6
37.10

R12
1.390418
d12=
0.746

R13
∞
d13=
0.210
ndg
1.5168
vg
64.17

R14
∞
d14=
0.731

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
5.20E−01
−1.02E−02
6.27E−03
−1.30E−02
1.37E−02
−9.29E−03
3.46E−03
−5.26E−04

R2
2.00E−01
−2.65E−02
−2.71E−03
2.43E−03
−2.34E−03
−9.58E−03
6.34E−03
−2.17E−03

R3
−8.23E+00
2.51E−02
−4.68E−02
−5.13E−03
3.30E−02
−6.63E−02
3.01E−02
−6.25E−03

R4
2.38E+01
−5.08E−02
−3.46E−02
−3.27E−02
5.36E−02
−6.15E−02
2.48E−02
−7.49E−04

R5
0.00E+00
−8.69E−02
−4.29E−02
−5.32E−02
−4.51E−03
2.71E−02
3.75E−03
−2.08E−03

R6
0.00E+00
−4.75E−02
4.49E−02
−1.43E−01
1.49E−01
−8.83E−02
2.06E−02
8.16E−04

R7
3.90E+00
−3.01E−02
3.51E−02
6.69E−02
−5.69E−02
−1.14E−02
2.19E−02
−4.38E−03

R8
−2.74E−01
1.03E−02
−3.78E−02
5.47E−02
−3.75E−02
1.59E−02
−2.52E−03
2.26E−04

R9
−6.21E+00
1.61E−02
−1.88E−01
3.65E−01
−4.35E−01
3.04E−01
−1.11E−01
1.60E−02

R10
−4.42E+00
−1.55E−01
2.43E−01
−2.57E−01
1.71E−01
−6.39E−02
1.23E−02
−9.64E−04

R11
−7.27E+00
−1.55E−01
3.05E−02
−2.06E−03
−2.69E−04
1.29E−05
7.15E−06
−6.73E−07

R12
−4.09E+00
−1.13E−01
1.70E−02
−2.95E−03
3.03E−04
−1.69E−05
4.47E−07
−8.50E−09

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
0

P1R2
1
0.925

P2R1
1
0.695

P2R2
1
0.375

P3R1
2
0.245
1.095

P3R2
2
0.365
1.215

P4R1
2
1.125
1.315

P4R2
1
1.135

P5R1
1
1.405

P5R2
2
1.095
1.715

P6R1
3
0.505
1.595
2.065

P6R2
1
0.745

TABLE 12

Arrest point
Arrest point

number
position 1

P1R1
0

P1R2
0

P2R1
1
0.965

P2R2
1
0.595

P3R1
1
0.405

P3R2
1
0.595

P4R1
0

P4R2
0

P5R1
0

P5R2
0

P6R1
1
1.135

P6R2
1
1.845

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 1.957 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 83.79°, 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
Embodiment

1
2
3

f
4.183227866
4.172143734
3.914532977

f1
7.323642953
7.347240238
23.44938867

f2
12.94009748
12.1542058
6.238774613

f3
9.56E+12
1.00E+10
3.29E+13

f4
4.300807447
4.223856802
4.140313739

f5
−3.766827755
−3.298724921
−3.779336744

f6
11.7226863
8.30584367
8.904844562

f12
4.833621917
4.739294463
5.116545745

(R1 + R2)/(R1 − R2)
−5.470192599
−5.360602103
−15.43261256

(R3 + R4)/(R3 − R4)
−3.061210496
−2.968665597
−1.66522099

(R7 + R8)/(R7 − R8)
3.353751644
3.320712425
3.229988225

(R9 + R10)/(R9 −
−2.31341657
−2.757325541
−2.238788614

R10)

(R11 + R12)/(R11 −
−47.22590363
−27.77624754
−38.8163751

R12)

f1/f
1.75071576
1.761022799
5.990341326

f2/f
3.093328381
2.913180027
1.593746853

f4/f
1.028107382
1.012394843
1.057677573

f5/f
−0.900459615
−0.790654669
−0.965462998

f6/f
2.802306419
1.990785601
2.274816591

f12/f
1.155476601
1.135937486
1.307064157

d1
0.415000388
0.412750303
0.265207605

d3
0.413551573
0.415029777
0.472228637

d5
0.258455563
0.234672084
0.241182865

d7
0.558222314
0.562820801
0.575292708

d9
0.260998419
0.250046589
0.346780032

d11
0.948142399
0.934893526
0.887394579

Fno
2.000003761
2.00000179
1.999996412

TTL
5.506285314
5.509807727
5.453604356

d1/TTL
0.075368486
0.074911925
0.048629785

d3/TTL
0.075105366
0.075325637
0.08659019

d5/TTL
0.04693828
0.042591701
0.044224489

d7/TTL
0.101379112
0.1021489
0.10548853

d9/TTL
0.04740009
0.04538209
0.06358731

d11/TTL
0.172192748
0.169678067
0.16271708

n1
1.680561
1.668287
1.518659

n2
1.514
1.514
1.514

n3
1.651491
1.639018
1.539718

n4
1.705679
1.705679
1.705679

n5
1.709195
2.002463
1.70992

n6
1.541814
1.601758
1.540775

v1
56.3
56.3
56.3

v2
56.8
56.8
56.8

v3
20.499626
20.499471
22.852293

v4
55.018517
52.682222
70.00021

v5
25.6
25.6
25.6

v6
35.344735
35.236904
37.097636

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 positive 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≤n5≤2.2;0.01≤d9/TTL≤0.2;0.57≤f12/f≤1.96;wheref: the focal length of the camera optical lens;f1: the focal length of the first lens;f12: the combined focal length of the first lens and the second lens;n5: the refractive index of the fifth lens;d9: the thickness on-axis of the fifth 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 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: 1.125≤f1/f≤7.995;1.704≤n5≤2.1;0.027≤d9/TTL≤0.132.
4. The camera optical lens as described in claim 1, wherein first lens has a positive refractive power with a convex object side surface and a concave image side surface to the proximal axis, the camera optical lens further satisfies the following conditions: −30.87(R1+R2)/(R1−R2)≤−3.57;0.13 mm≤d1≤0.62 mm; 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.
5. The camera optical lens as described in claim 4 further satisfying the following conditions: −19.29≤(R1+R2)/(R1−R2)≤−4.47;0.21 mm≤d1≤0.5 mm.
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: 0.8≤f2/f≤4.64;−6.12≤(R3+R4)/(R3−R4)≤−1.11;0.21 mm≤d3≤0.71 mm; 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.
7. The camera optical lens as described in claim 6 further satisfying the following conditions: 1.27≤f2/f≤3.71;−3.83≤(R3+R4)/(R3−R4)≤−1.39;0.33 mm≤d3≤0.57 mm.
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 to the proximal axis; the camera optical lens further satisfies the following conditions: 0.12 mm≤d5≤0.39 mm; whered5: the thickness on-axis of the third lens.
9. The camera optical lens as described in claim 8 further satisfying the following conditions: 0.19 mm≤d5≤0.31 mm.
10. The camera optical lens as described in claim 1, wherein the fourth lens has a positive refractive power with a concave object side surface and a convex image side surface to the proximal axis; the camera optical lens further satisfies the following conditions: 0.51≤f4/f≤1.59;1.61≤(R7+R8)/(R7−R8)≤5.03;0.28 mm≤d7≤0.86 mm; 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.
11. The camera optical lens as described in claim 10 further satisfying the following conditions: 0.81≤f4/f≤1.27;2.58≤(R7+R8)/(R7−R8)≤4.02;0.45 mm≤d7≤0.69 mm.
12. 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 to the proximal axis; the camera optical lens further satisfies the following conditions: −1.93≤f5/f≤−0.53;−5.51≤(R9+R10)/(R9−R10)≤−1.49;0.13 mm≤d9≤0.52 mm; 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.
13. The camera optical lens as described in claim 12 further satisfying the following conditions: −1.21≤f5/f≤−0.66;−3.45≤(R9+R10)/(R9−R10)≤−1.87;0.20 mm≤d9≤0.42 mm.
14. 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 to the proximal axis; the camera optical lens further satisfies the following conditions: 1.00≤f6/f≤4.2;−94.45≤(R11+R12)/(R11−R12)≤−18.52;0.44 mm≤d11≤1.42 mm; 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.
15. The camera optical lens as described in claim 14 further satisfying the following conditions: 1.59≤f6/f≤3.36;−59.03≤(R11+R12)/(R11−R12)≤−23.15;0.71 mm≤d11≤−1.14 mm.
16. The camera optical lens as described in claim 1 further satisfying the following condition: 0.91≤f12/f≤1.57.
17. 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 6.06 mm.
18. The camera optical lens as described in claim 17, wherein the total optical length TTL of the camera optical lens is less than or equal to 5.79 mm.
19. 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.
20. The camera optical lens as described in claim 19, 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
201810203693.2	Mar 2018	CN	national
201810203738.6	Mar 2018	CN	national

US Referenced Citations (1)

Number	Name	Date	Kind
8964096	Katou	Feb 2015	B2

Related Publications (1)

	Number	Date	Country
	20190285839 A1	Sep 2019	US

Camera optical lens

Information

Patent Number

Date Filed

Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

Field of Search

CPC

International Classifications

Term Extension

Abstract

Description

Claims

Priority Claims (2)

US Referenced Citations (1)

Related Publications (1)