Camera optical lens

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Application Ser. No. 201810065856.5 and Ser. No. 201810065862.0 filed on Jan. 23, 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 shows 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 shows the longitudinal aberration of the camera optical lens shown in FIG. 5;

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

FIG. 8 shows 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 shows the longitudinal aberration of the camera optical lens shown in FIG. 9;

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

FIG. 12 shows 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 glass material, the fourth lens L4 is made of plastic material, the fifth lens L5 is made of plastic material, and the sixth lens L6 is made of plastic material.

Here, the focal length of the whole camera optical lens 10 is defined as f, the focal length of the first lens is defined as f1. The camera optical lens 10 further satisfies the following condition: 4≤f1/f≤10, which 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, 4≤f1/f≤9.5.

The refractive index of the third lens L3 is defined as n3. Here the following condition should be satisfied: 1.7≤n3≤2.2. This condition fixes the refractive index of the third lens L3, and when the value of the 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, 1.72≤n3≤2.13.

The thickness on-axis of the third lens L3 is defined as d5, and the total optical length of the camera optical lens 10 is defined as TTL. The following condition: 0.01≤d5/TTL≤0.2 should be satisfied. This condition fixes the ratio between the thickness on-axis of the third lens L3 and the total optical length TTL. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.05≤d5/TTL≤0.16 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: −38.36≤(R1+R2)/(R1−R2)≤−5.23, which fixes the shape of the first lens L1, by which, the shape of the first lens L can be reasonably controlled and it is effectively for correcting spherical aberration of the camera optical lens. Preferably, the condition −23.97≤(R1+R2)/(R1−R2)≤−6.54 shall be satisfied.

The thickness on-axis of the first lens L1 is defined as d1. The following condition: 0.11≤d1≤0.45 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.18≤d1≤0.36 shall be satisfied.

In this embodiment, the second lens L2 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 second lens L2 is f2. The following condition should be satisfied: 0.66≤f2/f≤3.83. 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 1.06≤f2/f≤3.06 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: −3.92≤(R3+R4)/(R3−R4)≤−1.06, which fixes the shape of the second lens L2, 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 on-axis Chromatic aberration is difficult to be corrected. Preferably, the following condition shall be satisfied, −2.45≤(R3+R4)/(R3−R4)≤−1.32.

The thickness on-axis of the second lens L2 is defined as d3. The following condition: 0.22≤d3≤0.73 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.35≤d3≤0.58 shall be satisfied.

In this embodiment, the third lens L3 has negative 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 third lens L3 is f3. The following condition should be satisfied: −7.21≤f3/f≤−0.99, by which the field curvature of the system then can be reasonably and effectively balanced. Preferably, the condition −4.51≤f3/f≤−1.24 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: 1.67≤(R5+R6)/(R5−R6)≤5.94, which is beneficial for the shaping of the third lens L3, and bad shaping and stress generation due to extra-large curvature of surface of the third lens L3 can be avoided. Preferably, the following condition shall be satisfied, 2.67≤(R5+R6)/(R5−R6)≤4.75.

The thickness on-axis of the third lens L3 is defined as d5. The following condition: 0.27≤d5≤0.92 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.42≤d5≤0.73 shall be satisfied.

In this embodiment, the fourth lens L4 has a positive refractive power with a convex 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 fourth lens L4 is f4. The following condition should be satisfied: 0.78≤f4/f≤2.52, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition −1.255≤f4/f≤2.02 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: −0.88≤(R7+R8)/(R7−R8)≤0.07, which fixes the shaping of the fourth lens L4. 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, −0.55≤(R7+R8)/(R7−R8)≤0.06.

The thickness on-axis of the fourth lens L4 is defined as d7. The following condition: 0.19≤d7≤0.80 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.30≤d7≤0.64 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: −9.06≤f5/f≤−1.70, which can effectively smooth the light angles of the camera and reduce the tolerance sensitivity. Preferably, the condition −5.66≤f5/f≤−2.12 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: −9.58≤(R9+R10)/(R9−R10)≤−1.25, by which, the shape of the fifth lens L5 is fixed, 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, −5.99≤(R9+R10)/(R9−R10)≤−1.56.

The thickness on-axis of the fifth lens L5 is defined as d9. The following condition: 0.14≤d9≤0.59 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.22≤d9≤0.47 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: 1.37≤f6/f≤9.27, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition 2.19≤f6/f≤7.41 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: 7.85≤(R11+R12)/(R11−R12)≤58.04, by which, the shape of the sixth lens L6 is fixed, 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, 12.57≤(R11+R12)/(R11−R12)≤46.43.

The thickness on-axis of the sixth lens L6 is defined as d11. The following condition: 0.34≤d11≤1.69 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.69≤d11≤1.35 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: 0.55≤f12/f≤2.39, 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 0.88≤f12/f≤1.92 should be satisfied.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.89 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 5.62 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 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 =
−0.287

R1
2.048
d1 =
0.302
nd1
1.4693
v1
38.00

R2
2.599
d2 =
0.044

R3
3.297
d3 =
0.442
nd2
1.7254
v2
55.90

R4
13.454
d4 =
0.048

R5
4.979
d5 =
0.531
nd3
2.0622
v3
23.50

R6
2.681
d6 =
0.210

R7
8.007
d7 =
0.491
nd4
1.5896
v4
55.80

R8
−7.282
d8 =
0.411

R9
−3.610
d9 =
0.333
nd5
1.6431
v5
21.40

R10
−7.919
d10 =
0.247

R11
1.122
d11 =
0.865
nd6
1.4839
v6
55.70

R12
1.050
d12 =
0.609

R13
∞
d13 =
0.210
ndg
1.5168
vg
64.17

R14
∞
d14 =
0.611

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 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 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
1.6038E−01
0.004484546
0.004982746
−0.017510993
0.011639438
−0.008656395
0.003601218
−1.69E−03

R2
2.1487E+00
−0.036960961
−0.059103485
0.045428214
0.009518569
−0.012886621
0.002276203
−0.00225724

R3
7.0832E−01
0.008402253
−0.037200088
0.001259001
0.039965322
−0.023894381
−4.30939E−05
0.002591397

R4
−1.9610E+01
−0.010291852
0.022015947
−0.1283294
0.074750574
0.016055352
−0.013929935
0.001538762

R5
1.3970E+01
−0.082006642
0.001106722
−0.043824034
−0.032721162
0.090189111
−0.030673901
−0.001904271

R6
−4.9642E+00
−0.010974345
0.025970843
−0.1378094
0.20073979
−0.12629022
0.034507977
−0.002794968

R7
3.5262E+01
−0.01207044
−0.021197834
0.069084953
−0.057699733
3.56113E−05
2.74E−02
−1.18E−02

R8
2.4231E+01
−0.024776789
−0.069109162
0.13161033
−0.095670415
0.042229208
−7.08E−03
−1.60E−04

R9
−6.4080E+01
0.11838219
−0.28704065
0.39159464
−0.43898494
3.05E−01
−1.16E−01
1.81E−02

R10
−3.5924E+02
−0.088665496
0.20232308
−0.26389941
1.75E−01
−6.50E−02
1.27E−02
−1.00E−03

R11
−6.9250E+00
−0.088665496
0.028978918
−0.003522646
3.18121E−05
4.51707E−05
2.64E−06
−9.63E−07

R12
−5.0813E+00
−0.12798799
0.01684142
−0.002720052
1.84E−04
3.14E−06
−7.17E−07
−2.74E−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, P2R 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
1
1.035

P1R2
1
1.065

P2R1
0

P2R2
2
0.505
0.995

P3R1
2
0.485
0.965

P3R2
0

P4R1
1
1.125

P4R2
1
0.945

P5R1
1
1.385

P5R2
0

P6R1
2
0.475
1.945

P6R2
1
0.625

TABLE 4

Arrest point
Arrest point
Arrest point

number
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
2
0.725
1.115

P3R1
2
0.775
1.085

P3R2
0

P4R1
1
1.235

P4R2
1
1.195

P5R1
0

P5R2
0

P6R1
1
1.005

P6R2
1
1.485

FIG. 2 and FIG. 3 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 486.1 nm, 587.6 nm and 656.3 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 587.6 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 2.199 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 80.10°, 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
vd

S1
∞
d0 =
−0.238

R1
2.219
d1 =
0.227
nd1
1.4693
v1
38.00

R2
2.463
d2 =
0.039

R3
3.145
d3 =
0.448
nd2
1.7449
v2
55.90

R4
13.866
d4 =
0.047

R5
4.966
d5 =
0.534
nd3
2.0373
v3
23.50

R6
2.748
d6 =
0.228

R7
7.970
d7 =
0.532
nd4
1.6002
v4
55.80

R8
−7.282
d8 =
0.413

R9
−4.770
d9 =
0.276
nd5
1.6198
v5
21.40

R10
−15.747
d10 =
0.313

R11
1.117
d11 =
0.858
nd6
1.4803
v6
55.70

R12
1.060546
d12 =
0.592

R13
∞
d13 =
0.210
ndg
1.5168
vg
64.17

R14
∞
d14 =
0.595

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

TABLE 6

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
1.1542E−01
0.003333022
0.004893268
−0.017482763
0.011422419
−0.008999381
0.003288848
−2.20E−03

R2
2.1005E+00
−0.037360588
−0.060056774
0.044794241
0.009209554
−0.013123395
0.002091267
−0.002441226

R3
6.1532E−01
0.007326644
−0.036726512
0.00138087
0.039977877
−0.023894156
−3.7807E−05
0.002613367

R4
−7.5472E+00
−0.009548686
0.022003844
−0.12822004
0.074963264
0.016172934
−0.013906741
1.51E−03

R5
1.3963E+01
−0.082174101
0.00116586
−0.043824001
−0.032730346
0.09019638
−0.030651887
−0.001879308

R6
−5.9109E+00
−0.012197025
0.024231771
−0.13934553
0.20005369
−0.12655946
0.034404573
−0.002830929

R7
3.5132E+01
−0.014281792
−0.022160186
0.069147803
−0.057729485
2.1807E−05
0.027392102
−1.18E−02

R8
2.4020E+01
−0.026645798
−0.069163055
0.13173748
−0.095566839
0.042284023
−0.007045866
−1.33E−04

R9
−6.5230E+01
0.12597569
−0.28589218
0.39130267
−0.43904774
0.30499899
−1.16E−01
0.018042562

R10
−3.3257E+03
−0.086048033
0.20213072
−0.26394389
0.17499461
−0.06505056
0.012672044
−1.00E−03

R11
−5.0349E+00
−0.086048033
0.028911475
−0.003597751
1.90411E−05
4.30488E−05
2.51872E−06
−9.07E−07

R12
−4.2157E+00
−0.12255432
0.016839193
−0.002725017
1.84E−04
3.16E−06
−7.09E−07
−1.48E−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

number
position 1
position 2

P1R1
1
0.975

P1R2
1
1.055

P2R1
0

P2R2
2
0.505
0.985

P3R1
2
0.485
0.965

P3R2
1
0.805

P4R1
1
1.115

P4R2
1
0.935

P5R1
1
1.395

P5R2
0

P6R1
1
0.535

P6R2
1
0.675

TABLE 8

Arrest point
Arrest point
Arrest point

number
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
2
0.725
1.105

P3R1
2
0.775
1.075

P3R2
0

P4R1
1
1.235

P4R2
1
1.195

P5R1
0

P5R2
0

P6R1
1
1.125

P6R2
1
1.625

FIG. 6 and FIG. 7 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 486.1 nm, 587.6 nm and 656.3 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 587.6 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 2.138 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 81.69°, 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
vd

S1
∞
d0 =
−0.100

R1
2.454
d1 =
0.237
nd1
1.6268
v1
25.40

R2
3.171
d2 =
0.034

R3
4.407
d3 =
0.485
nd2
1.6602
v2
69.53

R4
13.606
d4 =
0.056

R5
6.106
d5 =
0.611
nd3
1.7384
v3
25.40

R6
3.643
d6 =
0.216

R7
5.772
d7 =
0.373
nd4
1.6552
v4
71.39

R8
−14.755
d8 =
0.453

R9
−3.556
d9 =
0.395
nd5
1.6545
v5
34.98

R10
−5.433
d10 =
0.116

R11
1.644
d11 =
1.124
nd6
1.5293
v6
25.70

R12
1.44747
d12 =
0.470

R13
∞
d13 =
0.210
ndg
1.5168
vg
64.17

R14
∞
d14 =
0.464

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
−2.1955E+00
−0.0380805
−0.017552349
−0.018276022
0.01786074
−0.003881996
0.00725066
−4.57E−03

R2
4.7887E+00
−0.064499491
−0.063577499
0.034473949
0.01202228
−0.006269644
0.005905782
−0.009122278

R3
5.2982E+00
0.030781069
−0.030640289
0.008955282
0.039810182
−0.02886338
−0.001882811
0.001594442

R4
−9.6087E+02
−0.042072613
0.018486826
−0.13079846
0.072098681
0.01603653
−0.014068927
0.000475204

R5
−3.6040E−01
−0.12758039
−0.001541076
−0.040629139
−0.035005696
0.086646203
−0.03106846
0.002212481

R6
−8.7019E+00
−0.026901202
0.032116171
−0.13254375
0.19574345
−0.13058898
0.031419568
−0.000107302

R7
−6.9759E+01
0.006889219
−0.017689332
0.065120749
−0.056729947
−0.001929675
0.025062579
−0.009348674

R8
8.7414E+01
−0.016244622
−0.080277313
0.12516756
−0.097054462
0.042385033
−0.006596142
−2.14E−04

R9
−5.3591E+02
0.12599051
−0.29490379
0.3933696
−0.43905017
0.30489823
−1.16E−01
1.79E−02

R10
−7.7934E+00
−0.10257567
0.20078115
−0.26449797
0.17399546
−0.065255056
0.012704837
−9.60E−04

R11
−6.5165E+01
−0.10257567
0.029930867
−0.002958623
0.000116587
3.07832E−05
−1.73566E−06
−4.15E−06

R12
−8.8956E+00
−0.19721015
0.015694247
−0.002660678
1.85E−04
2.70E−06
−7.00E−07
−1.02E−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
1
0.685

P1R2
1
0.635

P2R1
1
1.025

P2R2
1
0.295

P3R1
2
0.325
1.045

P3R2
2
0.705
1.235

P4R1
1
1.105

P4R2
1
1.045

P5R1
2
0.225
0.565

P5R2
0

P6R1
1
0.255

P6R2
1
0.585

TABLE 12

Arrest point
Arrest point

number
position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
1
0.495

P3R1
1
0.545

P3R2
1
1.085

P4R1
1
1.235

P4R2
1
1.275

P5R1
0

P5R2
0

P6R1
1
0.545

P6R2
1
1.375

FIG. 10 and FIG. 11 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 486.1 nm, 587.6 nm and 656.3 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 587.6 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 1.895 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 85.65°, 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.

TABLE 13

Embodiment 1
Embodiment 2
Embodiment 3

f
4.178
4.062
3.789

f1
17.513
36.786
15.371

f2
5.912
5.364
9.669

f3
−6.208
−6.759
−13.669

f4
6.546
6.424
6.379

f5
−10.637
−11.148
−17.161

f6
11.592
11.105
23.407

f12
4.574
4.815
6.048

(R1 + R2)/(R1 − R2)
−8.432
−19.178
−7.851

(R3 + R4)/(R3 − R4)
−1.649
−1.587
−1.958

(R5 + R6)/(R5 − R6)
3.334
3.478
3.957

(R7 + R8)/(R7 − R8)
0.047
0.045
−0.438

(R9 + R10)/
−2.676
−1.869
−4.791

(R9 − R10)

(R11 + R12)/
30.200
38.695
15.708

(R11 − R12)

f1/f
4.192
9.056
4.056

f2/f
1.415
1.321
2.552

f3/f
−1.486
1.664
−3.607

f4/f
1.567
1.581
1.683

f5/f
−2.546
2.744
−4.529

f6/f
2.775
2.734
6.177

f12/f
1.095
1.185
1.596

d1
0.302
0.227
0.237

d3
0.442
0.448
0.485

d5
0.531
0.534
0.611

d7
0.491
0.532
0.373

d9
0.333
0.276
0.395

d11
0.865
0.858
1.124

Fno
1.900
1.900
2.000

TTL
5.353
5.311
5.243

d1/TTL
0.057
0.043
0.045

d3/TTL
0.083
0.084
0.092

d5/TTL
0.099
0.101
0.117

d7/TTL
0.092
0.100
0.071

d9/TTL
0.062
0.052
0.075

d11/TTL
0.162
0.162
0.214

n1
1.4693
1.4693
1.6268

n2
1.7254
1.7449
1.6602

n3
2.0622
2.0373
1.7384

n4
1.5896
1.6002
1.6552

n5
1.6431
1.6198
1.6545

n6
1.4839
1.4803
1.5293

v1
38.0000
38.0000
25.4000

v2
55.9000
55.9000
69.5315

v3
23.5000
23.5000
25.4000

v4
55.8000
55.8000
71.3856

v5
21.4000
21.4000
34.9793

v6
55.7000
55.7000
25.7024

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: 4≤f1/f≤9.5;1.72≤n3≤2.13;0.05≤d5/TTL≤0.16;wheref: the focal length of the camera optical lens;f1: the focal length of the first lens;n3: the refractive index of the third lens;d5: the thickness on-axis of the third 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 glass material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, the sixth lens is made of plastic material.
3. 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 relative to the proximal axis; the camera optical lens further satisfies the following conditions: −38.36≤(R1+R2)/(R1−R2)≤−5.23;0.11 mm≤d1≤0.45 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.
4. The camera optical lens as described in claim 3 further satisfying the following conditions: −23.97≤(R1+R2)/(R1−R2)≤−6.54;0.18 mm≤d1≤0.36 mm.
5. 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 relative to the proximal axis; the camera optical lens further satisfies the following conditions: 0.66≤f2/f≤3.83;−3.92≤(R3+R4)/(R3−R4)≤−1.06;0.22 mm≤d3≤0.73 mm; where:f: 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; andd3: the thickness on-axis of the second lens.
6. The camera optical lens as described in claim 5 further satisfying the following conditions: 1.06≤f2/f≤3.06;−2.45≤(R3+R4)/(R3−R4)≤−1.32;0.35 mm≤d3≤0.58 mm.
7. 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 relative to the proximal axis; the camera optical lens further satisfies the following conditions: −7.21≤f3/f≤−0.99;1.67≤(R5+R6)/(R5−R6)≤5.94;0.27 mm≤d5≤0.92 mm; 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; andd5: the thickness on-axis of the third lens.
8. The camera optical lens as described in claim 7 further satisfying the following conditions: −4.51≤f3/f≤−1.24;2.67≤(R5+R6)/(R5−R6)≤4.75;0.42 mm≤d5≤0.73 mm.
9. 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 relative to the proximal axis; the camera optical lens further satisfies the following conditions: 0.78≤f4/f×2.52;−0.88≤(R7+R8)/(R7−R8)≤0.07;0.19 mm≤d7≤0.80 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; andd7: the thickness on-axis of the fourth lens.
10. The camera optical lens as described in claim 9 further satisfying the following conditions: 1.25≤f4/f≤2.02;−0.55≤(R7+R8)/(R7−R8)≤0.06;0.30 mm≤d7≤0.64 mm.
11. 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 relative to the proximal axis; the camera optical lens further satisfies the following conditions: −9.06≤f5/f≤−1.70;−9.58≤(R9+R10)/(R9−R10)≤−1.25;0.14 mm≤d9≤0.59 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; andd9: the thickness on-axis of the fifth lens.
12. The camera optical lens as described in claim 11 further satisfying the following conditions: −5.66≤f5/f≤−2.12;−5.99≤(R9+R10)/(R9−R10)≤−1.56;0.22 mm≤d9≤0.47 mm.
13. 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 relative to the proximal axis; the camera optical lens further satisfies the following conditions: 1.37≤f6/f≤9.27;7.85≤(R11+R12)/(R11−R12)≤58.04;0.43 mm≤d11≤1.69 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.
14. The camera optical lens as described in claim 13 further satisfying the following conditions: 2.19≤f6/f≤7.41;12.57≤(R11+R12)/(R11−R12)≤46.43;0.69 mm≤d11≤1.35 mm.
15. The camera optical lens as described in claim 1 further satisfying the following condition: 0.55≤f12/f≤2.39; wheref12: the combined focal length of the first lens and the second lens;f: the focal length of the camera optical lens.
16. The camera optical lens as described in claim 15 further satisfying the following condition: 0.88≤f12/f≤1.92.
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 5.89 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 5.62 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
2018 1 0065856	Jan 2018	CN	national
2018 1 0065862	Jan 2018	CN	national

US Referenced Citations (4)

Number	Name	Date	Kind
9042042	Wade	May 2015	B2
9046672	You	Jun 2015	B2
20150029599	Huang	Jan 2015	A1
20190129137	Nitta	May 2019	A1

Related Publications (1)

	Number	Date	Country
	20190227272 A1	Jul 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 (4)

Related Publications (1)