Camera Optical Lens

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Applications Ser. No. 201711259395.7 and Ser. No. 201711257308.4 filed on Dec. 4, 2017, 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 having a negative refractive power, a third lens L3 having a positive refractive power, a fourth lens L4, a fifth lens L5, and a sixth lens L6. Optical element like optical filter GF can be arranged between the sixth lens L6 and the image surface Si. The first lens L1 is made of plastic material, the second lens L2 is made of glass material, the third lens L3 is made of plastic material, the fourth lens L4 is made of glass 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 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 upper 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 lower 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, 0.8≤f1/f≤5.58.

The refractive power of the second lens L2 is defined as n2. Here the following condition should satisfied: 1.7≤n2≤2.2. This condition fixes the refractive power of the second lens L2, 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, 1.71≤n2≤2.15.

The refractive power of the fourth lens L4 is defined as n4. Here the following condition should satisfied: 1.7≤n4≤2.2. This condition fixes the refractive power of the fourth lens L4, 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, 1.71≤n4≤1.76.

The thickness on-axis of the second lens L2 is defined as d3, and the total optical length of the camera optical lens 10 is defined as TTL. The following condition: 0.025≤d3/TTL≤0.2 should be satisfied. This condition fixes the ratio between the thickness on-axis of the second lens L2 and the total optical length TTL. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.034≤d3/TTL≤0.126 shall be satisfied.

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: −4.23≤(R1+R2)/(R1−R2)≤−1.22, which fixes the shape of the first lens L1, when the value is beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the condition −2.64≤(R1+R2)/(R1−R2)≤−1.52 shall be satisfied.

The thickness on-axis of the first lens L1 is defined as d1. The following condition: 0.33≤d1≤1.03 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.52≤d1≤0.83 shall be satisfied.

In this embodiment, the second lens L2 has a 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 second lens L2 is f2. The following condition should be satisfied: −5.2≤f2/f≤−1.54. When the condition is satisfied, the negative 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 −3.25≤f2/f≤−1.92 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: 1.64≤(R3+R4)/(R3−R4)≤7.24, 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, 2.62≤(R3+R4)/(R3−R4)≤5.79.

The thickness on-axis of the second lens L2 is defined as d3. The following condition: 0.1≤d3≤0.41 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.17≤d3≤0.33 shall be satisfied.

In this embodiment, the third lens L3 has a positive 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 third lens L3 is f3. The following condition should be satisfied: 0.91≤f3/f≤3.2, by which the field curvature of the system then can be reasonably and effectively balanced. Preferably, the condition 1.46≤f3/f≤2.56 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: 0.56≤(R5+R6)/(R5−R6)≤1.92, 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, 0.9≤(R5+R6)/(R5−R6)≤1.53.

The thickness on-axis of the third lens L3 is defined as d5. The following condition: 0.22≤d5≤0.83 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.34≤d5≤0.67 shall be satisfied.

In this embodiment, the fourth lens L4 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 fourth lens L4 is f4. The following condition should be satisfied: −64.64≤f4/f≤−6.28, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition −40.4≤f4/f≤−7.85 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: −57.07≤(R7+R8)/(R7−R8)≤−5.48, by which, 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, −35.67≤(R7+R8)/(R7−R8)≤−6.85.

The thickness on-axis of the fourth lens L4 is defined as d7. The following condition: 0.08≤d7≤0.28 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.13≤d7≤0.22 shall be satisfied.

In this embodiment, the fifth lens L5 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 fifth lens L5 is f5. The following condition should be satisfied: −0.56≤f5/f≤1.98, which can effectively smooth the light angles of the camera and reduce the tolerance sensitivity. Preferably, the condition 0.9≤f5/f≤1.58 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: −1.78≤(R9+R10)/(R9−R10)≤−0.56, 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, −1.11≤(R9+R10)/(R9−R10)≤−0.7.

The thickness on-axis of the fifth lens L5 is defined as d9. The following condition: 0.21≤d9≤0.68 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.34≤d9≤0.54 shall be satisfied.

In this embodiment, the sixth lens L6 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 sixth lens L6 is f6. The following condition should be satisfied: −1.42≤f6/f≤−0.45, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition −0.89≤f6/f≤−0.56 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: −2.75≤(R11+R12)/(R11−R12)≤−0.89, 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, −1.72≤(R11+R12)/(R11−R12)≤−1.12.

The thickness on-axis of the sixth lens L6 is defined as d11. The following condition: 0.1≤d11≤0.32 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.16≤d11≤0.26 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: 0.83≤f12/f≤2.77, 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 1.33≤f12/f≤2.22 should be satisfied.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.72 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 5.46 mm.

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

With such design, the total optical length TTL of the 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 =
−0.200

R1
1.836
d1 =
0.652
nd1
1.5439
ν1
55.95

R2
6.274
d2 =
0.055

R3
6.574
d3 =
0.208
nd2
1.7174
ν2
29.52

R4
3.502
d4 =
0.319

R5
−35.400
d5 =
0.431
nd3
1.5439
ν3
55.95

R6
−3.936
d6 =
0.348

R7
−5.813
d7 =
0.159
nd4
1.7174
ν4
29.52

R8
−7.424
d8 =
0.360

R9
3.083
d9 =
0.426
nd5
1.5352
ν5
56.12

R10
−52.834
d10 =
0.803

R11
−1.310
d11 =
0.216
nd6
1.5352
ν6
56.12

R12
−8.389
d12 =
0.350

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.309

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 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
−2.0295E−01
1.0844E−02
−3.5075E−03
−5.1225E−03
1.2164E−02
−6.3072E−03
2.5049E−03
−8.2974E−03

R2
1.7721E+01
−1.3694E−01
1.0926E−01
−2.8209E−02
−3.1582E−02
9.0800E−03
4.5109E−03
−8.2069E−03

R3
2.1094E+01
−1.6076E−01
1.6551E−01
−6.1518E−02
−2.3028E−02
1.1070E−02
1.1556E−02
−6.8498E−03

R4
5.5956E+00
−4.8527E−02
8.4054E−02
−2.5877E−02
1.2354E−02
−4.0070E−02
4.0539E−02
−1.1513E−02

R5
0.0000E+00
−6.0776E−02
1.1709E−03
2.0636E−03
−9.2178E−03
2.5554E−02
−2.9301E−02
1.3016E−02

R6
1.5704E+00
−7.1723E−02
−1.2450E−02
4.7644E−03
2.2549E−03
−1.4154E−02
9.2496E−03
−1.2809E−03

R7
−3.5929E+01
−1.2459E−01
7.0319E−02
−1.4147E−02
−1.3676E−04
2.5187E−03
−1.2678E−03
1.6531E−04

R8
−4.3418E+00
−1.2165E−01
6.0971E−02
−7.8371E−04
−2.0931E−03
−3.2630E−04
1.0995E−04
−2.0394E−06

R9
−1.0747E+00
−6.0352E−02
−4.7967E−04
−5.9672E−04
−9.5928E−04
5.8599E−04
−1.8814E−04
2.5136E−05

R10
−6.8857E+03
3.1894E−02
−3.2007E−02
8.9949E−03
−1.5491E−03
1.7854E−04
−1.5769E−05
8.8594E−07

R11
−1.7105E+00
2.2115E−02
−1.5698E−02
5.8181E−03
−9.8991E−04
8.9761E−05
−4.2075E−06
8.7549E−08

R12
−2.0440E+02
4.6490E−03
−8.4050E−03
2.6425E−03
−5.1204E−04
5.2733E−05
−2.6553E−06
5.9313E−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+A1¹⁰+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
position 3

P1R1
1
0.965

P1R2
1
0.385

P2R1
3
0.355
0.675
0.945

P2R2
0

P3R1
1
1.035

P3R2
0

P4R1
2
1.065
1.395

P4R2
2
1.005
1.585

P5R1
2
0.655
1.885

P5R2
2
0.225
0.715

P6R1
1
1.545

P6R2
1
2.655

TABLE 4

Arrest point
Arrest point
Arrest point

number
position 1
position 2

P1R1
0

P1R2
1
0.825

P2R1
0

P2R2
0

P3R1
0

P3R2
0

P4R1
0

P4R2
1
1.555

P5R1
1
1.115

P5R2
2
0.405
0.885

P6R1
0

P6R2
0

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 1.88 mm, the full vision field image height is 3.928 mm, the vision field angle in the diagonal direction is 85.87°, 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 =
−0.200

R1
1.883
d1 =
0.668
nd1
1.5439
ν1
55.95

R2
5.871
d2 =
0.055

R3
6.074
d3 =
0.252
nd2
1.9020
ν2
25.10

R4
3.554
d4 =
0.307

R5
−31.268
d5 =
0.495
nd3
1.5439
ν3
55.95

R6
−3.800
d6 =
0.342

R7
−5.711
d7 =
0.160
nd4
1.7174
ν4
29.52

R8
−6.881
d8 =
0.360

R9
2.973
d9 =
0.431
nd5
1.5352
ν5
56.12

R10
−42.338
d10 =
0.794

R11
−1.321
d11 =
0.202
nd6
1.5352
ν6
56.12

R12
−8.369
d12 =
0.350

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.450

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
1.0179E+00
−1.5477E−01
1.5429E−02
−1.1796E−02
−5.9284E−03
1.4502E−02
−4.4218E−03
4.9970E−03

R2
1.0098E+00
1.6194E+01
−1.4688E−01
1.1262E−01
−2.6722E−02
−2.7356E−02
1.5063E−02
8.9141E−03

R3
1.0080E+00
2.0751E+01
−1.5756E−01
1.5992E−01
−6.2220E−02
−2.3344E−02
1.0214E−02
1.1331E−02

R4
1.0000E+00
5.0765E+00
−5.5636E−02
8.7091E−02
−2.9000E−02
8.6281E−03
−4.1733E−02
4.0279E−02

R5
1.0826E+00
0.0000E+00
−5.9451E−02
2.4726E−03
2.5908E−03
−1.0156E−02
2.3887E−02
−2.9414E−02

R6
1.2069E+00
1.6033E+00
−7.2950E−02
−1.1869E−02
3.8828E−03
1.4536E−03
−1.4500E−02
9.1355E−03

R7
1.4749E+00
−4.5050E+01
−1.2442E−01
7.0323E−02
−1.4133E−02
−1.2749E−04
2.5015E−03
−1.2827E−03

R8
1.5649E+00
−3.7173E+00
−1.2171E−01
6.0921E−02
−8.1735E−04
−2.1118E−03
−3.3495E−04
1.0895E−04

R9
1.9900E+00
−1.0291E+00
−6.0101E−02
−7.7421E−04
−5.6404E−04
−9.5857E−04
5.8349E−04
−1.8931E−04

R10
2.1871E+00
−6.4784E+03
3.2901E−02
−3.1954E−02
9.0076E−03
−1.5467E−03
1.7885E−04
−1.5768E−05

R11
2.2899E+00
−1.6805E+00
2.1974E−02
−1.5695E−02
5.8211E−03
−9.8908E−04
8.9950E−05
−4.1777E−06

R12
2.7430E+00
−2.0884E+02
5.2666E−03
−8.3904E−03
2.6429E−03
−5.1205E−04
5.2730E−05
−2.6564E−06

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
0

P1R2
1
0.385

P2R1
2
0.395
0.635

P2R2
0

P3R1
1
1.005

P3R2
0

P4R1
2
1.065
1.335

P4R2
1
1.015

P5R1
2
0.675
1.915

P5R2
2
0.235
0.735

P6R1
1
1.555

P6R2
1
2.655

TABLE 8

Arrest point
Arrest point
Arrest point

number
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
0

P3R2
0

P4R1
0

P4R2
0

P5R1
1
1.135

P5R2
2
0.435
0.915

P6R1
0

P6R2
0

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.

In this embodiment, the pupil entering diameter of the camera optical lens is 1.964 mm, the full vision field image height is 3.928 mm, the vision field angle in the diagonal direction is 83.82°, 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 =
−0.200

R1
1.880
d1 =
0.688
nd1
1.5439
ν1
55.95

R2
5.254
d2 =
0.078

R3
5.549
d3 =
0.273
nd2
2.1019
ν2
16.79

R4
3.644
d4 =
0.306

R5
−78.618
d5 =
0.555
nd3
1.5439
ν3
55.95

R6
−4.750
d6 =
0.258

R7
−5.472
d7 =
0.187
nd4
1.7174
ν4
29.52

R8
−5.870
d8 =
0.399

R9
2.840
d9 =
0.450
nd5
1.5352
ν5
56.12

R10
−32.497
d10 =
0.825

R11
−1.328
d11 =
0.200
nd6
1.5352
ν6
56.12

R12
−9.146
d12 =
0.350

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.421

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

TABLE 10

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
−1.7511E−01
1.3248E−02
−9.8044E−03
−2.4849E−04
1.3200E−02
−7.7038E−03
4.4483E−03
−2.0458E−03

R2
1.9371E+01
−1.4227E−01
1.2650E−01
−2.9023E−02
−2.9353E−02
1.6368E−02
1.4226E−02
1.1418E−03

R3
2.2462E+01
−1.4462E−01
1.5557E−01
−6.0086E−02
−2.0341E−02
1.2632E−02
1.2558E−02
−5.4695E−03

R4
4.5480E+00
−6.7149E−02
9.5063E−02
−2.5506E−02
1.0054E−02
−4.2616E−02
3.8850E−02
−8.6762E−03

R5
0.0000E+00
−6.9224E−02
4.4030E−04
−6.8589E−05
−1.3525E−02
2.3903E−02
−2.4674E−02
1.4212E−02

R6
1.6539E+00
−7.2247E−02
−1.5486E−02
2.0320E−03
2.0733E−03
−1.2995E−02
9.8902E−03
−2.2840E−03

R7
−5.5092E+01
−1.2364E−01
7.0597E−02
−1.4071E−02
−1.0321E−04
2.5042E−03
−1.2722E−03
1.7113E−04

R8
−1.4538E+00
−1.2278E−01
6.0533E−02
−9.4453E−04
−2.1540E−03
−3.3700E−04
1.1709E−04
4.1630E−06

R9
−1.1449E+00
−6.0821E−02
−7.9765E−04
−4.7511E−04
−9.2076E−04
5.9007E−04
−1.9339E−04
2.1327E−05

R10
−2.5861E+03
3.3329E−02
−3.1910E−02
9.0212E−03
−1.5413E−03
1.7983E−04
−1.5780E−05
7.7209E−07

R11
−1.6399E+00
2.1543E−02
−1.5729E−02
5.8188E−03
−9.8932E−04
8.9973E−05
−4.1680E−06
9.3697E−08

R12
−2.8125E+02
5.8050E−03
−8.3591E−03
2.6449E−03
−5.1176E−04
5.2753E−05
−2.6571E−06
5.8409E−08

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

TABLE 11

Inflexion point
Inflexion point
Inflexion point

number
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
1
1.005

P3R2
0

P4R1
2
1.035
1.425

P4R2
1
1.045

P5R1
1
0.685

P5R2
2
0.275
0.735

P6R1
1
1.575

P6R2
1
2.635

TABLE 12

Arrest point
Arrest point
Arrest point

number
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
0

P3R2
0

P4R1
0

P4R2
0

P5R1
1
1.145

P5R2
2
0.525
0.865

P6R1
0

P6R2
0

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 1.973 mm, the full vision field image height is 3.928 mm, the vision field angle in the diagonal direction is 83.27°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

TABLE 13

Embodi-
Embodi-
Embodi-

ment 1
ment 2
ment 3

f
4.137
4.320
4.341

f1
4.537
4.812
5.023

f2
−10.755
−9.966
−10.416

f3
8.102
7.903
9.270

f4
−38.969
−49.658
−140.285

f5
5.457
5.209
4.902

f6
−2.931
−2.961
−2.930

f12
6.866
7.804
8.015

(R1 + R2)/(R1 − R2)
−1.827
−1.944
−2.115

(R3 + R4)/(R3 − R4)
3.281
3.819
4.826

(R5 + R6)/(R5 − R6)
1.250
1.277
1.129

(R7 + R8)/(R7 − R8)
−8.219
−10.762
−28.535

(R9 + R10)/(R9 − R10)
−0.890
−0.869
−0.839

(R11 + R12)/(R11 − R12)
−1.370
−1.375
−1.340

f1/f
1.097
1.114
1.157

f2/f
−2.600
−2.307
−2.400

f3/f
1.958
1.829
2.136

f4/f
−9.419
−11.494
−32.319

f5/f
1.319
1.206
1.129

f6/f
−0.708
−0.685
−0.675

f12/f
1.660
1.806
1.846

d1
0.652
0.668
0.688

d3
0.208
0.252
0.273

d5
0.431
0.495
0.555

d7
0.159
0.160
0.187

d9
0.426
0.431
0.450

d11
0.216
0.202
0.200

Fno
2.200
2.200
2.200

TTL
4.847
5.075
5.200

d1/TTL
0.135
0.132
0.132

d3/TTL
0.043
0.050
0.052

d5/TTL
0.089
0.098
0.107

d7/TTL
0.033
0.032
0.036

d9/TTL
0.088
0.085
0.087

d11/TTL
0.045
0.040
0.038

n1
1.5439
1.5439
1.5439

n2
1.7174
1.9020
2.1019

n3
1.5439
1.5439
1.5439

n4
1.7174
1.7174
1.7174

n5
1.5352
1.5352
1.5352

n6
1.5352
1.5352
1.5352

v1
55.9524
55.9524
55.9524

v2
29.5181
25.1014
16.7851

v3
55.9524
55.9524
55.9524

v4
29.5181
29.5181
29.5181

v5
56.1153
56.1153
56.1153

v6
56.1153
56.1153
56.1153

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 negative 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≤n2≤2.2;1.7≤n4≤2.2;0.025≤d3/TTL≤0.2;wheref: the focal length of the camera optical lens;f1: the focal length of the first lens;n2: the refractive power of the second lens;n4: the refractive power of the fourth lens;d3: the thickness on-axis of the second lens;TTL: the total optical length of the camera optical lens.
2. The camera optical lens as described in claim 1, wherein the first lens is made of plastic material, the second lens is made of glass material, the third lens is made of plastic material, the fourth lens is made of glass material, the fifth lens is made of plastic material, and the sixth lens is made of plastic material.
3. The camera optical lens as described in claim 1 further satisfying the following conditions: 0.8≤f1/f≤5.58;1.71≤n2≤2.15;1.71≤n4≤1.76;0.034≤d3/TTL≤0.126.
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; the camera optical lens further satisfies the following conditions: −4.23≤(R1+R2)/(R1−R2)≤−1.22;0.33≤d1≤1.03; 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: −2.64≤(R1+R2)/(R1−R2)≤−1.52;0.52≤d1≤0.83.
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: −5.2≤f2/f≤−1.54;1.64≤(R3+R4)/(R3−R4)≤7.24;0.1≤d3≤0.41; 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: −3.25≤f2/f≤−1.92;2.62≤(R3+R4)/(R3−R4)≤5.79;0.17≤d3≤0.33.
8. The camera optical lens as described in claim 1, wherein the third lens has a concave object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions: 0.91≤f3/f≤3.2;0.56≤(R5+R6)/(R5−R6)≤1.92;0.22≤d5≤0.83; 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.
9. The camera optical lens as described in claim 8 further satisfying the following conditions: 1.46≤f3/f≤2.56;0.9≤(R5+R6)/(R5−R6)≤1.53;0.34≤d5≤0.67.
10. The camera optical lens as described in claim 1, wherein the fourth 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: −64.64≤f4/f≤−6.28;−57.07≤(R7+R8)/(R7−R8)≤−5.48;0.08≤d7≤0.28; 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: −40.4≤f4/f≤−7.85;−35.67≤(R7+R8)/(R7−R8)≤−6.85;0.13≤d7≤0.22.
12. The camera optical lens as described in claim 1, wherein the fifth lens has a positive refractive power with a convex object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions: 0.56≤f5/f≤1.98;−1.78≤(R9+R10)/(R9−R10)≤−0.56;0.21≤d9≤0.68; 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: 0.9≤f5/f≤1.58;−1.11≤(R9+R10)/(R9−R10)≤−0.7;0.34≤d9≤0.54.
14. The camera optical lens as described in claim 1, wherein the sixth lens has a negative refractive power with a concave object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions: −1.42≤f6/f≤−0.45;−2.75≤(R11+R12)/(R11−R12)≤−0.89;0.1≤d11≤0.32; 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: −0.89≤f6/f≤−0.56;−1.72≤(R11+R12)/(R11−R12)≤−1.12;0.16≤d11≤0.26.
16. The camera optical lens as described in claim 1 further satisfying the following condition: 0.83≤f12/f≤2.77; wheref12: the combined focal length of the first lens and the second lens;f: the focal length of the camera optical lens.
17. The camera optical lens as described in claim 16 further satisfying the following condition: 1.33≤f12/f≤2.22.
18. The camera optical lens as described in claim 1, wherein the total optical length TTL of the camera optical lens is less than or equal to 5.72 mm.
19. The camera optical lens as described in claim 18, wherein the total optical length TTL of the camera optical lens is less than or equal to 5.46 mm.
20. The camera optical lens as described in claim 1, wherein the aperture F number of the camera optical lens is less than or equal to 2.27.
21. The camera optical lens as described in claim 20, wherein the aperture F number of the camera optical lens is less than or equal to 2.22.

Priority Claims (2)

Number	Date	Country	Kind
201711257308.4	Dec 2017	CN	national
201711259395.7	Dec 2017	CN	national

Camera Optical Lens

Information

Publication Number

Date Filed

Date Published

Inventors

Original Assignees

CPC

International Classifications

Abstract

Description

Claims

Priority Claims (2)