Camera optical lens

Description

FIELD OF THE PRESENT DISCLOSURE

The present disclosure relates to optical lens, in particular to a camera optical lens suitable for handheld devices such as smart phones and digital cameras and imaging devices.

DESCRIPTION OF RELATED ART

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but the photosensitive devices of general camera lens are no other than Charge Coupled Device (CCD) or Complementary metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices shrink, coupled with the current development trend of electronic products being that their functions should be better and their shape should be thin and small, miniature camera lens with good imaging quality therefor has become a mainstream in the market. In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. And, with the development of technology and the increase of the diverse demands of users, and under this circumstances that the pixel area of photosensitive devices is shrinking steadily and the requirement of the system for the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structure gradually appear in lens design. There is an urgent need for ultra-thin wide-angle camera lenses which have good optical characteristics and the chromatic aberration of which is fully corrected.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the exemplary embodiments can be better understood with reference to the following drawings. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.

FIG. 1 is a schematic diagram of a camera optical lens in accordance with a first embodiment of the present invention;

FIG. 2 shows the longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 shows the lateral color of the camera optical lens shown in FIG. 1;

FIG. 4 presents a schematic diagram of the field curvature and distortion of the camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a camera optical lens in accordance with a second embodiment of the present invention;

FIG. 6 presents the longitudinal aberration of the camera optical lens shown in FIG. 5;

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

FIG. 8 presents the field curvature and distortion of the camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a camera optical lens in accordance with a third embodiment of the present invention;

FIG. 10 presents the longitudinal aberration of the camera optical lens shown in FIG. 9;

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

FIG. 12 presents the field curvature and distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The present disclosure will hereinafter be described in detail with reference to several exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure.

(Embodiment 1)

As referring to FIG. 1, the present invention provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 of embodiment 1 of the present invention, the camera optical lens 10 comprises 6 lenses. Specifically, from the object side to the image side, the camera optical lens 10 comprises in sequence: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. Optical element like optical filter GF can be arranged between the sixth lens L6 and the image surface Si. The first lens L1 is made of 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 glass 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: 0.5≤f1/f≤5. Condition 0.5≤f1/f≤5 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, 0.71≤f1/f≤3.13.

The refractive power of the third lens L3 is defined as n3. Here the following condition should satisfied: 1.7≤n3≤2.2. This condition fixes the refractive power of the third lens L3, 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, 1.80≤n3≤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, 1.71≤n6≤1.96.

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: 0.03≤d3/TTL≤0.15 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 0.036≤d3/TTL≤0.098 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: −3.75≤(R1+R2 )/(R1−R2)≤−0.72, 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 −2.34≤(R1+R2)/(R1−R2)≤−0.90 shall be satisfied.

The thickness on-axis of the first lens L1 is defined as d1. The following condition: 0.21≤d1≤0.78 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.34≤d1≤0.62 shall be satisfied.

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

The focal length of the whole camera optical lens 10 is f, the focal length of the second lens L2 is f2. The following condition should be satisfied: −31.43≤f2/f≤−1.82. 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 −19.64≤f2/f≤−2.28 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: 1.94≤(R3+R4)/(R3−R4)≤29.48, which fixes the shape of the second lens L2 and can effectively correct aberration of the camera optical lens. Preferably, the following condition shall be satisfied, 3.11≤(R3+R4)/(R3−R4)≤23.58.

The thickness on-axis of the second lens L2 is defined as d3. The following condition: 0.11≤d3≤0.36 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.18≤d3≤0.29 shall be satisfied.

In this embodiment, the third lens L3 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 third lens L3 is f3. The following condition should be satisfied: −7.44≤f3/f≤−1.15, by which the field curvature of the system then can be reasonably and effectively balanced. Preferably, the condition −4.65≤f3/f≤−1.44 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: −5.25≤(R5+R6)/(R5−R6)≤−1.32, 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, −3.28≤(R5+R6)/(R5−R6)≤−1.65.

The thickness on-axis of the third lens L3 is defined as d5. The following condition: 0.11≤d5≤0.35 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.17≤d5≤0.28 shall be satisfied.

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

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: 0.90≤f4/f≤35.17, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition 1.44≤f4/f≤28.13 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: −11.73≤(R7+R8)/(R7−R8)≤−0.31, 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, −7.33≤(R7+R8)/(R7−R8)≤−0.39.

The thickness on-axis of the fourth lens L4 is defined as d7. The following condition: 0.25≤d7≤0.93 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.40≤d7≤0.75 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: 0.34≤f5/f≤1.04, which can effectively smooth the light angles of the camera and reduce the tolerance sensitivity. Preferably, the condition 0.54≤f5/f≤0.83 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: 0.25≤(R9+R10)/(R9−R10)≤1.08, 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, 0.40≤(R9+R10)/(R9−R10)≤0.86.

The thickness on-axis of the fifth lens L5 is defined as d9. The following condition: 0.36≤d9≤1.13 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.58≤d9≤0.90 shall be satisfied.

In this embodiment, the sixth lens L6 has a negative refractive power with a concave 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: −0.95≤f6/f≤−0.30, which can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the condition −0.59≤f6/f≤−0.38 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: −1.25≤(R11+R12)/(R11−R12)≤−0.28, 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, −0.78≤(R11+R12)/(R11−R12)≤−0.35.

The thickness on-axis of the sixth lens L6 is defined as d11. The following condition: 0.11≤d11≤0.48 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.17≤d11≤0.39 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: 0.62≤f12/f≤2.03, 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 1.00≤f12/f≤1.62 should be satisfied.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.71 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 5.45 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 =
−0.160

R1
1.998
d1 =
0.423
nd1
1.5449
ν1
55.93

R2
6.572
d2 =
0.038

R3
3.145
d3 =
0.220
nd2
1.6397
ν2
23.53

R4
2.841
d4 =
0.321

R5
−4.331
d5 =
0.210
nd3
1.9229
ν3
18.90

R6
−13.223
d6 =
0.099

R7
4.995
d7 =
0.494
nd4
1.5352
ν4
56.09

R8
−17.238
d8 =
0.740

R9
10.230
d9 =
0.752
nd5
1.5352
ν5
56.09

R10
−1.664
d10 =
0.668

R11
−1.924
d11 =
0.321
nd6
1.7292
ν6
54.68

R12
4.762
d12 =
0.192

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.500

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
A12
A14
A16

R1
2.7062E−01
3.7723E−03
7.5808E−03
−1.6652E−02
1.5758E−R2
6.4716E−04
−9.1148E−03
9.1702E−03

R2
−1.4000E+02
−1.8567E−02
6.5283E−03
1.9131E−02
1.0169E−02
−9.9431E−04
−8.1469E−03
9.3784E−03

R3
−1.9222E+01
−3.8105E−02
−8.9198E−03
2.2719E−02
2.1750E−02
1.6145E−03
−8.9791E−03
−2.8964E−03

R4
−6.9016E−01
−5.3107E−02
−3.5921E−02
−1.1986E−03
1.1125E−02
−7.0571E−03
−5.5521E−03
9.9175E−03

R5
1.3812E+01
4.2291E−03
−3.7477E−03
−6.1809E−03
−1.1298E−03
−5.8939E−03
3.6285E−03
1.6346E−02

R6
1.1131E+02
−4.5291E−02
5.3247E−02
1.2871E−02
−1.6622E−02
6.1890E−03
−3.3320E−03
2.8133E−03

R7
−4.6339E+01
−1.0856E−01
4.6033E−02
2.8021E−03
−1.1802E−03
−3.3309E−04
−5.5773E−04
−2.1592E−04

R8
1.0757E+02
−7.2429E−02
1.0693E−03
−5.2525E−03
4.7161E−03
3.5295E−05
−1.6649E−04
2.0649E−04

R9
−1.0746E+02
−3.8507E−02
1.2350E−02
−3.1991E−03
−5.9279E−05
4.8764E−05
2.6196E−05
−4.1017E−06

R10
−6.3568E−01
2.9756E−02
5.7298E−03
−6.0164E−04
2.4199E−04
−3.5921E−05
−6.2482E−06
1.1037E−06

R11
−3.6431E+00
−2.4970E−02
5.5014E−03
1.6430E−04
−6.3030E−05
−6.1439E−06
1.5318E−06
−7.4867E−08

R12
8.7981E−01
−3.8367E−02
4.1231E−03
−2.7175E−04
2.0036E−05
−6.3590E−06
8.1364E−07
−3.3139E−08

Among them, K is a conic index, A4, A6, A8, A10, A12, A14, A16 are aspheric surface indexes.

IH: Image height

y=(x²/R)/[1+{1−(k+1)(x²/R²)}^1/2]+A4x⁴+A6x⁶+A8x⁸+A10x¹⁰+A12x¹²+A14x¹⁴+A16x¹⁶ (1)

For convenience, the aspheric surface of each lens surface uses the aspheric surfaces shown in the above condition (1). However, the present invention is not limited to the aspherical polynomials form shown in the condition (1).

Table 3 and table 4 show the inflexion points and the arrest point design data of the camera optical lens 10 lens in embodiment 1 of the present invention. In which, P1R1 and P1R2 represent respectively the object side surface and image side surface of the first lens L1, P2R1 and P2R2 represent respectively the object side surface and image side surface of the second lens L2, P3R1 and P3R2 represent respectively the object side surface and image side surface of the third lens L3, P4R1 and P4R2 represent respectively the object side surface and image side surface of the fourth lens L4, P5R1 and P5R2 represent respectively the object side surface and image side surface of the fifth lens L5, P6R1 and P6R2 represent respectively the object side surface and image side surface of the sixth lens L6. The data in the column named “inflexion point position” are the vertical distances from the inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column named “arrest point position” are the vertical distances from the arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

TABLE 3

Inflexion point
Inflexion point
Inflexion point

number
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
2
0.605
1.005

P3R1
1
0.955

P3R2
1
0.705

P4R1
1
0.365

P4R2
1
1.205

P5R1
2
0.435
1.835

P5R2
1
1.205

P6R1
2
1.525
2.615

P6R2
1
0.765

TABLE 4

Arrest point number
Arrest point position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
0

P3R2
1
0.975

P4R1
1
0.705

P4R2
0

P5R1
1
0.805

P5R2
1
2.225

P6R1
0

P6R2
1
1.445

FIG. 2 and FIG. 3 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 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 555 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 1.837 mm, the full vision field image height is 3.918 mm, the vision field angle in the diagonal direction is 88.49°, 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
νd

S1
∞
d0 =
−0.160

R1
1.989
d1 =
0.519
nd1
1.5449
ν1
55.93

R2
50.152
d2 =
0.037

R3
5.068
d3 =
0.230
nd2
1.6713
ν2
19.24

R4
2.993
d4 =
0.348

R5
−7.552
d5 =
0.230
nd3
1.8929
ν3
20.36

R6
−16.838
d6 =
0.133

R7
15.638
d7 =
0.577
nd4
1.5352
ν4
56.09

R8
22.068
d8 =
0.481

R9
5.880
d9 =
0.727
nd5
1.5352
ν5
56.09

R10
−1.931
d10 =
0.840

R11
−1.749
d11 =
0.215
nd6
1.7130
ν6
53.87

R12
7.575
d12 =
0.140

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.500

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
4.6223E−02
−2.9411E−03
3.3075E−03
−2.7668E−02
1.1149E−02
5.7022E−03
−1.0949E−02
0.0000E+00

R2
−1.0000E+02
8.6250E−03
−3.5007E−02
1.0132E−03
2.8522E−03
1.3387E−03
−5.0355E−03
−3.3805E−04

R3
1.8966E+00
−7.5752E−03
−1.8862E−02
1.1926E−02
8.8579E−03
3.2083E−04
−6.2051E−04
−6.7552E−04

R4
−1.4250E−01
−2.8141E−02
−6.5583E−03
−8.0172E−03
−1.7902E−03
1.6949E−03
1.8291E−03
−3.4216E−03

R5
5.5167E+00
−1.4760E−02
−2.1066E−02
−6.2765E−03
−2.6548E−03
−3.1085E−03
−3.7424E−04
2.2668E−03

R6
6.0891E+01
−9.4938E−03
1.4678E−02
7.7526E−03
4.2097E−04
1.7706E−04
−1.8883E−05
1.4619E−04

R7
−6.3658E+02
−9.6220E−02
3.9815E−02
−1.6391E−03
1.2881E−04
1.1866E−03
−1.4036E−04
−3.6169E−04

R8
−3.8127E+02
−1.0709E−01
1.2890E−02
−4.9540E−03
1.2745E−03
−6.2753E−04
1.4642E−05
1.6139E−04

R9
−9.6380E+00
−2.6947E−02
5.0498E−03
−3.0220E−03
2.3130E−04
−1.3057E−05
3.3696E−06
6.4533E−07

R10
−4.8062E−01
4.8257E−02
2.1680E−03
−1.7299E−03
2.1080E−04
2.3089E−05
−6.5425E−06
3.9286E−07

R11
−4.5998E+00
−3.5480E−02
6.7222E−03
1.3428E−04
−6.1387E−05
−4.4008E−06
8.1611E−07
−2.0940E−08

R12
4.3978E+00
−3.2435E−02
3.8454E−03
−2.8634E−04
3.0719E−06
−3.9249E−06
8.4948E−07
−4.5913E−08

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

TABLE 7

Inflexion point
Inflexion point
Inflexion point
Inflexion point

number
position 1
position 2
position 3

P1R1
1
0.915

P1R2
1
0.445

P2R1
0

P2R2
1
0.765

P3R1
0

P3R2
1
0.665

P4R1
3
0.225
0.995
1.245

P4R2
2
0.195
1.375

P5R1
1
0.705

P5R2
2
1.125
2.045

P6R1
3
1.585
2.525
2.825

P6R2
2
0.645
3.195

TABLE 8

Arrest point number
Arrest point position 1

P1R1
0

P1R2
1
0.635

P2R1
0

P2R2
1
1.075

P3R1
0

P3R2
1
0.905

P4R1
1
0.395

P4R2
1
0.325

P5R1
1
1.175

P5R2
0

P6R1
0

P6R2
1
1.175

FIG. 6 and FIG. 7 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 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 555 nm passes the camera optical lens 20 in the second embodiment.

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

In this embodiment, the pupil entering diameter of the camera optical lens is 1.879 mm, the full vision field image height is 3.918 mm, the vision field angle in the diagonal direction is 86.97°, 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
νd

S1
∞
d0 =
−0.180

R1
2.061
d1 =
0.442
nd1
1.5449
ν1
55.93

R2
17.325
d2 =
0.060

R3
4.375
d3 =
0.240
nd2
1.6713
ν2
19.24

R4
2.990
d4 =
0.350

R5
−7.009
d5 =
0.220
nd3
1.8929
ν3
20.36

R6
−17.617
d6 =
0.098

R7
13.594
d7 =
0.621
nd4
1.5352
ν4
56.09

R8
−37.537
d8 =
0.546

R9
6.205
d9 =
0.749
nd5
1.5352
ν5
56.09

R10
−1.911
d10 =
0.821

R11
−1.695
d11 =
0.215
nd6
1.7292
ν6
54.68

R12
7.353
d12 =
0.117

R13
∞
d13 =
0.210
ndg
1.5168
νg
64.17

R14
∞
d14 =
0.500

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

TABLE 10

Conic Index
Aspherical Surface Index

k
A4
A6
A8
A10
A12
A14
A16

R1
3.7937E−02
−4.1203E−03
5.5916E−03
−2.8120E−02
1.0047E−02
5.6670E−03
−1.0320E−02
2.6084E−04

R2
−9.9455E+01
2.3860E−03
−2.9836E−02
3.0536E−03
3.2636E−03
1.0266E−03
−5.9498E−03
−2.9198E−04

R3
2.0003E+00
−7.5264E−03
−1.8991E−02
1.2113E−02
9.2410E−03
−3.0385E−04
−9.8917E−04
−9.7066E−04

R4
2.0574E−01
−1.9976E−02
−8.8681E−03
−8.9545E−03
−9.4447E−04
2.0891E−03
1.1818E−03
−4.1956E−03

R5
1.4729E+01
−1.5355E−02
−2.1853E−02
−5.1752E−03
−2.1101E−03
−2.9217E−03
−2.7111E−04
2.4499E−03

R6
1.0046E+02
−1.3891E−02
1.3391E−02
6.9946E−03
7.7284E−04
3.2189E−04
−8.4070E−05
1.5599E−04

R7
−1.5690E+02
−8.6213E−02
3.7657E−02
−1.7595E−03
5.3891E−05
5.4670E−04
−1.6263E−04
−2.1604E−04

R8
0.0000E+00
−8.7860E−02
1.0291E−03
−2.4255E−03
1.6227E−03
−8.3772E−04
−9.9209E−05
1.8057E−04

R9
−3.5268E+00
−2.7592E−02
4.7536E−03
−2.8054E−03
1.9899E−04
−1.8772E−05
2.9145E−06
8.0328E−07

R10
−4.5782E−01
4.4288E−02
2.5754E−03
−1.6713E−03
2.0699E−04
2.8607E−05
−6.9768E−06
3.5568E−07

R11
−3.5598E+00
−3.4898E−02
6.6522E−03
1.2504E−04
−6.1729E−05
−4.4311E−06
8.1590E−07
−1.9071E−08

R12
4.2621E+00
−3.3938E−02
3.9698E−03
−2.5996E−04
−2.2858E−07
−4.0715E−06
8.3650E−07
−4.3727E−08

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

TABLE 11

Inflexion point
Inflexion point
Inflexion point
Inflexion point

number
position 1
position 2
position 3

P1R1
1
0.915

P1R2
1
0.515

P2R1
0

P2R2
1
0.795

P3R1
0

P3R2
1
0.715

P4R1
3
0.275
0.995
1.235

P4R2
1
1.415

P5R1
1
0.725

P5R2
2
1.225
2.105

P6R1
2
1.615
2.475

P6R2
2
0.635
3.115

TABLE 12

Arrest point number
Arrest point position 1

P1R1
0

P1R2
1
0.775

P2R1
0

P2R2
0

P3R1
0

P3R2
1
0.955

P4R1
1
0.475

P4R2
0

P5R1
1
1.185

P5R2
0

P6R1
0

P6R2
1
1.165

FIG. 10 and FIG. 11 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 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 555 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 1.840 mm, the full vision field image height is 3.918 mm, the vision field angle in the diagonal direction is 88.32°, 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
4.042
4.133
4.048

f1
5.087
3.773
4.236

f2
−63.510
−11.299
−14.987

f3
−6.994
−15.384
−13.051

f4
7.269
96.907
18.665

f5
2.725
2.799
2.812

f6
−1.836
−1.967
−1.864

f12
5.316
5.161
5.465

(R1 + R2)/(R1 − R2)
−1.874
−1.083
−1.270

(R3 + R4)/(R3 − R4)
19.650
3.886
5.318

(R5 + R6)/(R5 − R6)
−1.974
−2.626
−2.321

(R7 + R8)/(R7 − R8)
−0.551
−5.864
−0.468

(R9 + R10)/(R9 − R10)
0.720
0.505
0.529

(R11 + R12)/(R11 − R12)
−0.424
−0.625
−0.625

f1/f
1.259
0.913
1.046

f2/f
−15.713
−2.734
−3.702

f3/f
−1.730
−3.722
−3.224

f4/f
1.799
23.445
4.611

f5/f
0.674
0.677
0.695

f6/f
−0.454
−0.476
−0.460

f12/f
1.315
1.249
1.350

d1
0.423
0.519
0.442

d3
0.220
0.230
0.240

d5
0.210
0.230
0.220

d7
0.494
0.577
0.621

d9
0.752
0.727
0.749

d11
0.321
0.215
0.215

Fno
2.200
2.200
2.200

TTL
5.187
5.187
5.190

d1/TTL
0.081
0.100
0.085

d3/TTL
0.042
0.044
0.046

d5/TTL
0.040
0.044
0.042

d7/TTL
0.095
0.111
0.120

d9/TTL
0.145
0.140
0.144

d11/TTL
0.062
0.041
0.041

n1
1.5449
1.5449
1.5449

n2
1.6397
1.6713
1.6713

n3
1.9229
1.8929
1.8929

n4
1.5352
1.5352
1.5352

n5
1.5352
1.5352
1.5352

n6
1.7292
1.7130
1.7292

v1
55.9299
55.9299
55.9299

v2
23.5289
19.2429
19.2429

v3
18.8969
20.3618
20.3618

v4
56.0934
56.0934
56.0934

v5
56.0934
56.0934
56.0934

v6
54.6800
53.8671
54.6800

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, a third lens, a fourth lens, a fifth lens, and a sixth lens; wherein the camera optical lens further satisfies the following conditions:0.5≤f1/f≤5;1.7≤n3≤2.2;1.7≤n6≤2.2;0.03≤d3/TTL≤0.15;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;n6: the refractive index of the sixth lens;d3: the thickness on-axis of the second lens;TTL: the total optical length of the camera optical lens the total optical length TTL of the camera optical lens is less than or equal to 5.71 mm.
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 glass material.
3. The camera optical lens as described in claim 1 further satisfying the following conditions: 0.71≤f1/f≤3.13;1.80≤n3≤2.06;1.71≤n6≤1.96;0.036≤d3/TTL≤0.098.
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: −3.75≤(R1+R2)/(R1−R2)≤−0.72;0.21≤d1≤0.78; 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: −2.34≤(R1+R2)/(R1−R2)≤−0. 90;0.34≤d1≤0.62.
6. The camera optical lens as described in claim 1, wherein the second 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: −31.43≤f2/f≤−1.82;1.94≤(R3+R4)/(R3−R4)≤29.48;0.11≤d3≤0.36; 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: −19.64≤f2/f≤−2.28;3.11≤(R3+R4)/(R3−R4)≤23.58;0.18≤d3≤0.29.
8. The camera optical lens as described in claim 1, wherein the third 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:−7.44≤f3/f≤−1.15;−5.25≤(R5+R6)/(R5−R6)≤−1.32;0.11≤d5≤0.35; 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: −4.65≤f3/f≤−1.44;−3.28≤(R5+R6)/(R5−R6)≤−1. 65;0.17≤d5≤0.28.
10. The camera optical lens as described in claim 1, wherein the fourth lens has a positive refractive power with a convex object side surface; the camera optical lens further satisfies the following conditions: 0.90≤f4/f≤35.17;−11.73≤(R7+R8)/(R7−R8)≤−0.31;0.25≤d7≤0.93; 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: 1.44≤f4/f≤28.13;−7.33≤(R7+R8)/(R7−R8)≤−0.39;0.40≤d7≤0.75.
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:0.34≤f5/f≤1.04;0.25≤(R9+R10)/(R9−R10)≤1.08;0.36≤d9≤1.13; 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: 0.54≤f5/f≤0.83 ;0.40≤(R9+R10)/(R9−R10)≤0.86;0.58≤d9≤0.90.
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 concave image side surface; the camera optical lens further satisfies the following conditions:−0.95≤f6/f≤−0.30;−1.25≤(R11+R12)/(R11−R12)≤−0.28;0.11≤d11≤0.48; 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: −0.59≤f6/f≤−0.38;−0.78≤(R11+R12/(R11−R12)≤−0.35;0.17≤d11≤0.39.
16. The camera optical lens as described in claim 1 further satisfying the following condition: 0.62≤f12/f≤2.03; 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 conditions: 1.00≤f12/f≤1.62.
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 5.45 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 2.27.
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 2.22.

Priority Claims (2)

Number	Date	Country	Kind
2018 1 0143090	Feb 2018	CN	national
2018 1 0143107	Feb 2018	CN	national

US Referenced Citations (2)

Number	Name	Date	Kind
5311364	Kanoshima	May 1994	A
7889442	Suzuki	Feb 2011	B2

Related Publications (1)

	Number	Date	Country
	20190250372 A1	Aug 2019	US

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 (2)

Related Publications (1)