Camera optical lens

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of Chinese Patent Application Ser. No. 201711365922.2 and Ser. No. 201711368522.7 filed on Dec. 18, 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 is 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 glass material, the third lens L3 is made of plastic material, the fourth lens L4 is made of plastic material, the fifth lens L5 is made of plastic material, and the sixth lens L6 is made of glass material.

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

Here, the focal length of the whole camera optical lens 10 is defined as f, the focal length of the first lens is defined as f1. The camera optical lens further satisfies the following condition: 0.5≤f1/f≤10. Condition 0.5≤f1/f≤10 fixes the positive refractive power of the first lens L1. If the 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, 1.95≤f1/f≤9.7.

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, 1.703≤n2≤2.06.

The refractive power of the sixth lens L6 is defined as n6. Here the following condition should satisfied: 1.7≤n6≤2.2. This condition fixes the refractive power of the sixth lens L6, 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, 1.704≤f16≤2.13.

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: −29.86≤(R1+R2)/(R1−R2)≤−4.28, 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 −18.66≤(R1+R2)/(R1−R2)≤−5.35 shall be satisfied.

The thickness on-axis of the first lens L1 is defined as d1. The following condition: 0.24≤d1≤0.95 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.39≤d1≤0.76 shall be satisfied.

In this embodiment, the second lens L2 has 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≤2.44. 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 1.05≤f2/f≤1.95 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: −7.79≤(R3+R4)/(R3−R4)≤−2.19, 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, −4.87≤(R3+R4)/(R3−R4)≤−2.74.

The thickness on-axis of the second lens L2 is defined as d3. The following condition: 0.19≤d3≤0.66 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.3≤d3≤0.53 shall be satisfied.

In this embodiment, the third lens L3 has 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: 10.11≤f3/f≤6025.3, by which the field curvature of the system then can be reasonably and effectively balanced. Preferably, the condition 16.18≤f3/f≤4820.24 should be satisfied.

The thickness on-axis of the third lens L3 is defined as d5. The following condition: 0.19≤d5≤0.57 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.3≤d5≤0.46 shall be satisfied.

In this embodiment, the fourth lens L4 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 fourth lens L4 is f4. The following condition should be satisfied: 0.77≤f4/f≤2.66, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition 1.24≤f4/f≤2.13 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: 1.96≤(R7+R8)/(R7−R8)≤6.33, 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, 3.14≤(R7+R8)/(R7−R8)≤5.07.

The thickness on-axis of the fourth lens L4 is defined as d7. The following condition: 0.37≤d7≤1.15 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.6≤d7≤0.92 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: −18.38≤f5/f≤−4.21, which can effectively smooth the light angles of the camera and reduce the tolerance sensitivity. Preferably, the condition −11.49≤f5/f≤−5.26 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: −14.71≤(R9+R10)/(R9−R10)≤−4.41, 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, −9.19≤(R9+R10)/(R9−R10)≤−5.51.

The thickness on-axis of the fifth lens L5 is defined as d9. The following condition: 0.19≤d9≤0.65 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.3≤d9≤0.52 shall be satisfied.

In this embodiment, the sixth lens L6 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 sixth lens L6 is f6. The following condition should be satisfied: −4.5≤f6/f≤−0.92, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition −2.81≤f6/f≤−1.15 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: 2.05≤(R11+R12)/(R11−R12)≤6.85, 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, 3.28≤(R11+R12)/(R11−R12)≤5.48.

The thickness on-axis of the sixth lens L6 is defined as d11. The following condition: 0.37≤d11≤1.11 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.59≤d11≤0.89 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: 0.53≤f12/f≤2.05, 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 0.86≤f12/f≤1.64 should be satisfied.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 6.29 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 6 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 =
−0.793

R1
2.539
d1 =
0.605
nd1
1.5297
v1
64.15

R2
3.476
d2 =
0.087

R3
2.341
d3 =
0.405
nd2
1.706466
v2
70.00

R4
4.153
d4 =
0.348

R5
−42.369
d5 =
0.381
nd3
1.657616
v3
26.25

R6
−41.412
d6 =
0.160

R7
−2.709
d7 =
0.756
nd4
1.512826
v4
70.00

R8
−1.672
d8 =
0.114

R9
−4.718
d9 =
0.381
nd5
1.625325
v5
25.00

R10
−6.400
d10 =
0.271

R11
2.150
d11 =
0.733
nd6
1.708435
v6
33.95

R12
1.306
d12 =
0.645

R13
∞
d13 =
0.210
ndg
1.5168
vg
64.17

R14
∞
d14 =
0.619

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 10 in the embodiment 1 of the present invention.

TABLE 2

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
Al2
A14
A16

R1
1.1479E−01
−0.017223086
0.006994325
−0.01809893
0.013911086
−0.006874704
0.001683491
−4.65E−06

R2
−5.8335E+00
−0.091614204
0.027337444
0.014853619
−0.004290784
−0.014350451
0.011516066
0.000118878

R3
−5.4889E+00
−0.009843309
−0.021147207
0.020014255
0.045476663
−0.072264711
0.038089888
−4.0023E−05

R4
1.2462E+01
−0.048447741
−0.054474097
−0.028296896
0.069105526
−0.0771035
0.035273354
−0.002231179

R5
1.3459E+03
−0.077768049
−0.054258119
−0.07565298
−0.010825169
0.033784708
0.003914625
0.001932713

R6
−1.1019E+03
−0.028626384
0.064781225
−0.15871102
0.1691923
−0.095070907
0.020199362
−6.60238E−05

R7
2.4181E+00
0.014914821
0.060375589
0.066231188
−0.062407288
−0.013036783
2.41E−02
−5.68E−03

R8
−2.6229E−01
−0.00083933
−0.076026208
0.12992423
−0.10050355
0.040091588
−4.97E−03
5.66E−06

R9
−2.0092E+01
0.075977411
−0.22244929
0.37503873
−0.4514053
3.09E−01
−1.11E−01
1.61E−02

R10
−1.5165E+01
−0.10224782
0.22229786
−0.27143102
1.76E−01
−6.47E−02
1.26E−02
−1.01E−03

R11
−3.0201E+01
−0.10224782
0.033224321
−0.00235742
−0.000210897
1.91429E−05
7.36E−06
−1.19E−06

R12
−8.1027E+00
−0.1366457
0.017909081
−0.003249706
3.39E−04
−1.86E−05
3.84E−07
−2.19E−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

number
position 1
position 2

P1R1
0

P1R2
2
0.555
0.875

P2R1
0

P2R2
1
0.575

P3R1
0

P3R2
0

P4R1
2
0.665
1.175

P4R2
1
1.105

P5R1
1
1.445

P5R2
0

P6R1
1
0.365

P6R2
1
0.575

TABLE 4

Arrest point number
Arrest point position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
1
0.925

P3R1
0

P3R2
0

P4R1
0

P4R2
1
1.355

P5R1
0

P5R2
0

P6R1
1
0.705

P6R2
1
1.365

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 2.137 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 78.82°, 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 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 =
−0.768

R1
2.579
d1 =
0.633
nd1
1.4974
v1
56.04

R2
3.306
d2 =
0.098

R3
2.387
d3 =
0.379
nd2
1.95
v2
70.00

R4
4.036
d4 =
0.361

R5
−41.479
d5 =
0.374
nd3
1.676132
v3
24.26

R6
−41.479
d6 =
0.167

R7
−2.772
d7 =
0.767
nd4
1.480228
v4
70.00

R8
−1.702
d8 =
0.106

R9
−3.898
d9 =
0.437
nd5
1.64277
v5
25.00

R10
−5.276
d10 =
0.270

R11
2.197
d11 =
0.743
nd6
2.057878
v6
34.89

R12
1.335515
d12 =
0.567

R13
∞
d13 =
0.210
ndg
1.5168
vg
64.17

R14
∞
d14 =
0.542

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
Al2
A14
A16

R1
−1.7624E−01
−0.020004142
0.006555162
−0.018082446
0.013844307
−0.006835989
0.001706186
−1.36E−05

R2
−8.0212E+00
−0.095674
0.026621064
0.015294603
−0.003634345
−0.013731412
0.012074289
0.000655773

R3
−4.6532E+00
−0.008329667
−0.021412634
0.020017163
0.045591959
−0.072152985
0.038170665
−0.00011032

R4
1.2434E+01
−0.049040532
−0.051962785
−0.026381471
0.070201971
−0.077633717
0.034221114
−3.83E−03

R5
1.3712E+03
−0.079717655
−0.054848386
−0.075257942
−0.011547118
0.031962923
0.001685988
0.000999102

R6
−5.1473E+02
−0.02808545
0.06628622
−0.15795923
0.17011739
−0.094641562
0.020322826
−0.000145948

R7
2.3012E+00
0.017645008
0.061624026
0.067010003
−0.061995491
−0.012980092
0.024048708
−5.68E−03

R8
−2.4984E−01
−0.002652391
−0.076045439
0.13021537
−0.1003098
0.040155164
−0.004892559
3.42E−05

R9
−2.8625E+01
0.07857159
−0.2235707
0.37476056
−0.45131252
0.3094781
−1.11E−01
0.016127719

R10
−1.0224E+01
−0.1014476
0.22271127
−0.27133955
0.17587764
−0.06466264
0.01264369
−1.01E−03

R11
−2.6308E+01
−0.1014476
0.032791479
−0.002419589
−0.000216596
1.89903E−05
7.52689E−06
−1.11E−06

R12
−1.0656E+01
−0.1366642
0.017949835
−0.003244164
3.40E−04
−1.86E−05
3.78E−07
−4.21E−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
2
1.085
1.165

P1R2
2
0.525
0.875

P2R1
0

P2R2
2
0.605
0.955

P3R1
0

P3R2
0

P4R1
1
0.635

P4R2
1
1.095

P5R1
1
1.435

P5R2
0

P6R1
1
0.375

P6R2
1
0.535

TABLE 8

Arrest point number
Arrest point position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
0

P3R2
0

P4R1
1
1.045

P4R2
1
1.335

P5R1
0

P5R2
0

P6R1
1
0.725

P6R2
1
1.255

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 2.102 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 79.75°, 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 =
−0.674

R1
2.713
d1 =
0.489
nd1
1.4181
v1
42.98

R2
3.103
d2 =
0.073

R3
2.271
d3 =
0.438
nd2
1.73956
v2
70.00

R4
4.259
d4 =
0.355

R5
−67.379
d5 =
0.372
nd3
1.66766
v3
29.35

R6
−29.895
d6 =
0.175

R7
−2.813
d7 =
0.746
nd4
1.544301
v4
70.00

R8
−1.670
d8 =
0.112

R9
−4.582
d9 =
0.417
nd5
1.58831
v5
25.00

R10
−6.023
d10 =
0.273

R11
2.114
d11 =
0.737
nd6
1.708438
v6
28.13

R12
1.354877
d12 =
0.646

R13
∞
d13 =
0.210
ndg
1.5168
vg
64.17

R14
∞
d14 =
0.6199223

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
Al2
A14
A16

R1
2.3688E−01
−0.01624565
0.00735675
−0.018211935
0.0137523
−0.006716341
0.001663022
1.30E−04

R2
−7.5512E+00
−0.093713016
0.027066397
0.017468351
−0.002892974
−0.013113596
0.011441864
0.00075686

R3
−4.7963E+00
−0.008647208
−0.021200463
0.020049467
0.046147594
−0.072228501
0.037795921
−0.000491161

R4
1.3053E+01
−0.047617121
−0.046547061
−0.02560334
0.069395047
−0.080527753
0.032177444
−0.004589945

R5
3.4288E+03
−0.081438022
−0.056457057
−0.075937396
−0.011602466
0.02786089
−0.006636213
−0.013745443

R6
−7.0283E+02
−0.028493153
0.064192293
−0.15942513
0.16872759
−0.095505748
0.020146848
−0.000372841

R7
2.3304E+00
0.016041246
0.061120354
0.066626699
−0.062070521
−0.012837104
0.024328602
−0.005727761

R8
−2.4246E-01
−0.002329388
−0.076565489
0.12991025
−0.1004766
0.040133412
−0.004946197
1.46E−05

R9
−2.1022E+01
0.077618494
−0.2215519
0.37510389
−0.45127503
0.30944625
−1.11E−01
1.61E−02

R10
−1.1387E+01
−0.10125734
0.22255386
−0.27133457
0.17589134
−0.064656449
0.012645639
−1.01E−03

R11
−2.4702E+01
−0.10125734
0.033015452
−0.002421569
−0.000222157
1.74344E−05
7.14414E−06
−1.20E−06

R12
−8.5530E+00
−0.13638453
0.017964628
−0.003249023
3.39E−04
−1.87E−05
3.71E−07
−4.21E−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

number
position 1
position 2

P1R1
0

P1R2
2
0.555
0.825

P2R1
0

P2R2
1
0.595

P3R1
0

P3R2
0

P4R1
1
0.635

P4R2
1
1.115

P5R1
1
1.445

P5R2
2
1.635
1.755

P6R1
1
0.375

P6R2
1
0.575

TABLE 12

Arrest point number
Arrest point position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
1
0.915

P3R1
0

P3R2
0

P4R1
1
1.035

P4R2
1
1.355

P5R1
0

P5R2
0

P6R1
1
0.735

P6R2
1
1.365

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 1.982 mm, the full vision field image height is 3.512 mm, the vision field angle in the diagonal direction is 83.07°, 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
4.274
4.204
3.964

f1
14.541
18.277
37.717

f2
6.950
5.530
6.012

f3
2408.061
16886.676
80.166

f4
6.827
7.448
6.136

f5
−31.467
−26.522
−36.433

f6
−7.342
−5.787
−8.914

f12
4.934
4.498
5.410

(R1 + R2)/(R1 − R2)
−6.424
−8.087
−14.928

(R3 + R4)/(R3 − R4)
−3.584
−3.895
−3.283

(R5 + R6)/(R5 − R6)
4.223
4.180
3.920

(R7 + R8)/(R7 − R8)
6.613
-6.661
-7.355

(R9 + R10)/(R9 − R10)
4.095
4.101
4.569

(R11 + R12)/(R11 − R12)
3.402
4.348
9.514

f1/f
1.626
1.315
1.517

f2/f
563.379
4016.866
20.221

f3/f
1.597
1.772
1.548

f4/f
−7.362
−6.309
−9.190

f5/f
−1.718
−1.377
−2.248

f6/f
1.154
1.070
1.365

f12/f
0.605
0.633
0.489

d1
0.405
0.379
0.438

d3
0.381
0.374
0.372

d5
0.756
0.767
0.746

d7
0.381
0.437
0.417

d9
0.733
0.743
0.737

d11
2.000
2.000
2.000

Fno
5.715
5.654
5.662

TTL
0.106
0.112
0.086

d1/TTL
0.071
0.067
0.077

d3/TTL
0.067
0.066
0.066

d5/TTL
0.132
0.136
0.132

d7/TTL
0.067
0.077
0.074

d9/TTL
0.128
0.131
0.130

d11/TTL
1.5297
1.4974
1.4181

n1
1.7065
1.9500
1.7396

n2
1.6576
1.6761
1.6677

n3
1.5128
1.4802
1.5443

n4
1.6253
1.6428
1.5883

n5
1.7084
2.0579
1.7084

n6
64.1541
56.0378
42.9836

v1
70.0048
70.0002
70.0003

v2
26.2532
24.2635
29.3454

v3
70.0012
70.0000
70.0000

v4
24.9997
25.0000
25.0000

v5
33.9503
34.8872
28.1308

v6
4.274
4.204
3.964

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≤n2≤2.2;1.7≤n6≤2.2;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;n6: the refractive power of the sixth lens.
2. The camera optical lens as described in claim 1, wherein the first lens is made of plastic material, the second lens is made of glass material, the third lens is made of plastic material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, the sixth lens is made of glass material.
3. The camera optical lens as described in claim 1 further satisfying the following conditions: 1.95≤f1/f≤9.7;1.703≤n2≤2.06;1.704≤n6≤2.13.
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: −29.86≤(R1+R2)/(R1−R2)≤−4.28;0.24≤d1≤0.95; 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: −18.66≤(R1+R2)/(R1−R2)≤−5.35;0.39≤d1≤0.76.
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: 0.66≤f2/f≤2.44;−7.79≤(R3+R4)/(R3−R4)≤−2.19;0.19≤d3≤0.66; 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: 1.05≤f2/f≤1.95;−4.87≤(R3+R4)/(R3−R4)≤−2.74;0.3≤d3≤0.53.
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: 10.11≤f3/f≤6025.3;0.19≤d5≤0.57; wheref: the focal length of the camera optical lens;f3: the focal length 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: 16.18≤f3/f≤4820.24;0.3≤d5≤0.46.
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; the camera optical lens further satisfies the following conditions: 0.77≤f4/f≤2.66;1.96≤(R7+R8)/(R7−R8)≤6.33;0.37≤d7≤1.15; 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: 1.24≤f4/f≤2.13;3.14≤(R7+R8)/(R7−R8)≤5.07;0.6≤d7≤0.92.
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; the camera optical lens further satisfies the following conditions: −18.38≤f5/f≤−4.21;−14.71≤(R9+R10)/(R9−R10)≤−4.41;0.19≤d9≤0.65; 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: −11.49≤f5/f≤−5.26;−9.19≤(R9+R10)/(R9−R10)≤−5.51;0.3≤d9≤0.52.
14. The camera optical lens as described in claim 1, wherein the sixth lens has a negative refractive power with a convex object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions: −4.5≤f6/f≤−0.92;2.05≤(R11+R12)/(R11−R12)≤6.85;0.37≤d11≤1.11; 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: −2.81≤f6/f≤−1.15;3.28≤(R11+R12)/(R11−R12)≤5.48;0.59≤d11≤0.89.
16. The camera optical lens as described in claim 1 further satisfying the following condition: 0.53≤f12/f≤2.05; 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: 0.86≤f12/f≤1.64.
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 6.29 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 6 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 2.06.
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 2.02.

Priority Claims (2)

Number	Date	Country	Kind
2017 1 1365922	Dec 2017	CN	national
2017 1 1368522	Dec 2017	CN	national

US Referenced Citations (1)

Number	Name	Date	Kind
20170045717	Park	Feb 2017	A1

Camera optical lens

Information

Patent Number

Date Filed

Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

Field of Search

US

CPC

International Classifications

Term Extension

Abstract

Description

Claims

Priority Claims (2)

US Referenced Citations (1)