Camera Optical Lens

Description

FIELD OF THE PRESENT INVENTION

The present invention relates to the field of optical lens, and more particularly, to a camera optical lens suitable for handheld terminal devices, such as smart phones and digital cameras, and imaging devices, such as monitors or PC lenses.

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 in general the photosensitive devices of camera lens are nothing more 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 become smaller, plus the current development trend of electronic products towards better functions and thinner and smaller dimensions, miniature camera lenses with good imaging quality therefore have 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. Also, with the development of technology and the increase of the diverse demands of users, and as the pixel area of photosensitive devices is becoming smaller and smaller and the requirement of the system on the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structures gradually appear in lens designs. There is an urgent need for ultra-thin and wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG. 2 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 1;

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

FIG. 5 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 2 of the present invention;

FIG. 6 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 5;

FIG. 8 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 3 of the present invention;

FIG. 10 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 9;

FIG. 11 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 9; and

FIG. 12 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail below. However, it will be apparent to the one skilled in the art that, in the various embodiments of the present invention, a number of technical details are presented in order to provide the reader with a better understanding of the invention. However, the technical solutions claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.

Embodiment 1

As referring to the accompanying drawings, the present invention provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment 1 of the present invention, the camera optical lens comprises 6 lenses. Specifically, from an object side to an 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 elements like optical filter GF can be arranged between the sixth lens L6 and an image surface S1.

The first lens L1 is made of plastic material, the second lens L2 is made of plastic material, the third lens L3 is made of plastic material, the fourth lens L4 is made of plastic material, the fifth lens L5 is made of plastic material, and the sixth lens L6 is made of plastic material.

Here, a focal length of the camera optical lens 10 is defined as f, and a focal length of the first lens L1 is defined as f1. The camera optical lens further satisfies the following condition: 4.00 custom-character f1/f7.00, which defines a positive refractive power of the first lens L1. If the value of f1/f exceeds the lower limit of the above condition, although it is beneficial for developing toward ultra-thin lenses, the positive refractive power of the first lens L1 would be too strong to correct an aberration of the camera optical lens, and it is bad for wide-angle development of lenses. On the contrary, if the value of f1/f exceeds the upper limit of the above condition, the positive refractive power of the first lens L1 becomes too weak to develop ultra-thin lenses. Preferably, the following condition shall be satisfied, 4.00 custom-character f1/f6.95.

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

An on-axis thickness of the third lens L3 is defined as d5, and a curvature radius of an object side surface of the third lens L3 is defined as R5. The camera optical lens further satisfies the following condition: 10.00 custom-character R5/d530.00. When the value is within the range, it benefits for correcting the abberation of the optical system. Preferably, the following condition shall be satisfied, 10.00 R5/d5629.75.

A total optical length from an object side surface of the first lens to the image surface of the camera optical lens along an optical axis is defined as TTL. When the focal length of the optical camera lens, the focal length of the first lens, the curvature radius of the object side surface of the third lens, and the on-axis thickness of the third lens satisfy the above conditions, the camera optical lens 10 has the advantage of high performance and meets the design demand on low TTL.

In the embodiment, the object side surface of the first lens L1 is convex in a paraxial region, an image side surface of the first lens L2 is concave in the paraxial region, and the first lens L1 has a positive refractive power.

A curvature radius of the object side surface of the first lens L1 is defined as R1, and a curvature radius of the image side surface of the first lens L1 is defined as R2. The camera optical lens further satisfies the following condition: −13.60 custom-character (R1+R2)/(R1−R2)−1.17. This condition reasonably controls a shape of the first lens, so that the first lens can effectively correct the spherical aberration of the system. Preferably, the following condition shall be satisfied, −8.50(R1+R2)/(R1−R2)−1.47.

An on-axis thickness of the first lens L1 is defined as d1. The camera optical lens further satisfies the following condition: 0.03 custom-character d1/TTL 0.08, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.04d1/TTL0.06.

In the embodiment, an object side surface of the second lens L2 is convex in the paraxial region, and an image side surface of the second lens L2 is concave in the paraxial region.

The focal length of the camera optical lens camera optical lens 10 is defined as f, the focal length of the second lens L2 is defined as f2. The camera optical lens further satisfies the following condition: −1058.59 custom-character f2/f −32.07. A negative spherical aberration and the amount of an field curvature caused by the first lens L1 that has the positive refractive power can be resonably and effectively balanced by controlling the negative refractive power of the second lens L2 being within a reasonable range. Preferably, the following condition shall be satisfied, −661.62 custom-character f2/f−40.09.

A curvature radius of the object side surface of the second lens L2 is defined as R3, and a curvature radius of the image side surface of the second lens L2 is defined as R4. The camera optical lens further satisfies the following condition: 13.86 custom-character (R3+R4)/(R3−R4)50.98, which defines a shape of the second lens L2. When the value is within the range, as the camera optical lens develops toward ultra-thin and wide-angle, it is beneficial to correct the problem of an axial chromatic aberration. Preferably, the following condition shall be satisfied, 22.18 custom-character (R3+R4)/(R3−R4)40.79.

An on-axis thickness of the second lens L2 is defined as d3. The camera optical lens further satisfies the following condition: 0.02 custom-character d3/TTL 0.07, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.03d3/TTL0.06.

In the embodiment, the object side surface of the third lens L3 is convex in the paraxial region, and an image side surface of the third lens L3 is concave in the paraxialregion.

The focal length of the camera optical lens camera optical lens 10 is defined as f, and a focal length of the third lens L3 is defined as f3. The camera optical lens further satisfies the following condition: −6.36 custom-character f3/f−1.67. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, the following condition shall be satisfied, −3.98f3/f−2.09.

The curvature radius of the object side surface of the third lens L3 is defined as R5, and a curvature radius of the image side surface of the third lens L3 is defined as R6. The camera optical lens further satisfies the following condition: 1.39 custom-character (R5+R6)/(R5−R6)9.75. This can effectively control a shape of the third lens L3, thereby facilitating shaping of the third lens L3 and avoiding bad shaping and generation of stress due to the overly large surface curvature of the third lens L3. Preferably, the following condition shall be satisfied, 2.22 custom-character (R5+R6)/(R5−R6)7.80.

An on-axis thickness of the third lens L3 is defined as d5. The camera optical lens further satisfies the following condition: 0.02 custom-character d5/TTL 0.07, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.04d5/TTL0.06.

In the embodiment, an object side surface of the fourth lens L4 is convex in the paraxial region, an image side surface of the fourth lens L4 is convex in the paraxial region, and the fourth lens L4 has a positive refractive power.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the fourth lens L4 is defined as f4. The camera optical lens further satisfies the following condition: 0.49 custom-character f4/f1.68. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, the following condition shall be satisfied, 0.78f4/f1.35.

A curvature radius of the object side surface of the fourth lens L4 is defined as R7, and a curvature radius of the image side surface of the fourth lens L4 is defined as R8. The camera optical lens further satisfies the following condition: −0.88 custom-character (R7+R8)/(R7−R8)−0.18, which defines a shape of the fourth lens L4. When the value is within the range, as the development of ultra-thin and wide-angle lens, it benefits for solving the problems, such as correcting an off-axis aberration. Preferably, the following condition shall be satisfied, −0.55 custom-character (R7+R8)/(R7−R8)−0.22.

An on-axis thickness of the fourth lens L4 is defined as d7. The camera optical lens further satisfies the following condition: 0.05 custom-character d7/TTL 0.17, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.08d7/TTL0.14.

In the embodiment, an object side surface of the fifth lens L5 is concave in the paraxial region, an image side surface of the fifth lens L5 is convex in the paraxial region, and the fifth lens L5 has a positive refractive power.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the fifth lens L5 is defined as f5. The camera optical lens further satisfies the following condition: −0.29 custom-character f5/f0.98, which can effectively make a light angle of the camera lens be gentle, and the sensitivity of the tolerance can be reduced. Preferably, the following condition shall be satisfied, 0.47 f5/f0.78.

A curvature radius of the object side surface of the fifth lens L5 is defined as R9, and a curvature radius of the image side surface of the fifth lens L5 is defined as R10. The camera optical lens further satisfies the following condition: 0.61 custom-character (R9+R10)/(R9−R10)1.95, which defines a shape of the fifth lens L5. When the value is within the range, as the development of ultra-thin and wide-angle lens, it benefits for solving the problems, such as correcting the off-axis aberration. Preferably, the following condition shall be satisfied, 0.98 custom-character (R9+R10)/(R9−R10)1.56.

An on-axis thickness of the fifth lens L5 is defined as d9. The camera optical lens further satisfies the following condition: 0.056 custom-character d9/TTL 0.17, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.08d9/TTL0.14.

In the embodiment, an object side surface of the sixth lens L6 is concave in the paraxial region, an image side surface of the sixth lens L6 is concave in the paraxial region, and the sixth lens L6 has a negative refractive power.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the sixth lens L6 is defined as f6. The camera optical lens further satisfies the following condition: −1.13 custom-character f6/f−0.34. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, the following condition shall be satisfied, −0.70 f6/f−0.42.

A curvature radius of the object side surface of the sixth lens L6 is defined as R11, and a curvature radius of the image side surface of the sixth lens L6 is defined as R12. The camera optical lens further satisfies the following condition: 0.35 custom-character (R11+R12)/(R11−R12)1.33, which defines a shape of the sixth lens L6. When the value is within the range, as the development of ultra-thin and wide-angle lens, it benefits for solving the problems, such as correcting the off-axis aberration. Preferably, the following condition shall be satisfied, 0.56 custom-character (R11+R12)/(R11−R12)1.07.

An on-axis thickness of the sixth lens L6 is defined as d1. The camera optical lens further satisfies the following condition: 0.04 custom-character d11/TTL 0.13, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.06d11/TTL0.10.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.82 mm, it benefits for developing ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.55 mm.

In this embodiment, an F number of the camera optical lens 10 is less than or equal to 2.20. The camera optical lens 10 has a large F number and a better imaging performance. Preferably, the F number of the camera optical lens 10 is less than or equal to 2.16.

With such design, the total optical length TTL of the camera optical lens 10 can be made as short as possible, thus the miniaturization characteristics can be maintained.

In the following, examples will be used to describe the camera optical lens 10 of the present invention. The symbols recorded in each example will be described as follows. The focal length, on-axis distance, curvature radius, on-axis thickness, inflexion point position, and arrest point position are all in units of mm.

TTL: the total optical length from the object side surface of the first lens to the image surface of the camera optical lens 10 along the optical axis, the unit of TTL is mm.

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 Embodiment 1 of the present invention is shown in the tables 1 and 2.

TABLE 1

R
d
nd
νd

S1
∞
d0=
0.000

R1
5.817
d1=
0.268
nd1
1.5449
ν1
55.93

R2
21.123
d2=
0.027

R3
1.801
d3=
0.250
nd2
1.6510
ν2
21.51

R4
1.676
d4=
0.090

R5
4.177
d5=
0.250
nd3
1.6713
ν3
19.24

R6
2.535
d6=
0.054

R7
3.384
d7=
0.580
nd4
1.5439
ν4
55.95

R8
−6.145
d8=
0.950

R9
−8.972
d9=
0.592
nd5
1.5449
ν5
55.93

R10
−1.161
d10=
0.374

R11
−7.507
d11=
0.429
nd6
1.5449
ν6
55.93

R12
1.346
d12=
0.909

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.100

where, the meaning of the various symbols is as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radius for a lens;

R1: curvature radius of the object side surface of the first lens L1;

R2: curvature radius of the image side surface of the first lens L1;

R3: curvature radius of the object side surface of the second lens L2;

R4: curvature radius of the image side surface of the second lens L2;

R5: curvature radius of the object side surface of the third lens L3;

R6: curvature radius of the image side surface of the third lens L3;

R7: curvature radius of the object side surface of the fourth lens L4;

R8: curvature radius of the image side surface of the fourth lens L4;

R9: curvature radius of the object side surface of the fifth lens L5;

R10: curvature radius of the image side surface of the fifth lens L5;

R11: curvature radius of the object side surface of the sixth lens L6;

R12: curvature radius of the image side surface of the sixth lens L6;

R13: curvature radius of an object side surface of the optical filter GF;

R14: curvature radius of an image side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface of the first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the optical filter GF;

d13: on-axis thickness of the optical filter GF;

d14: on-axis distance from the image side surface of the optical filter GF to the image surface;

nd: refractive index of d line;

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

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

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

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

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

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

ndg: refractive index of d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

vg: abbe number of the optical filter GF;

Table 2 shows aspherical surface data of the camera optical lens 10 in Embodiment 1 of the present invention.

TABLE 2

Conic

coefficient
Aspheric surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
0.0000E+00
6.5369E−02
1.4840E−01
−2.7331E−01
−6.0509E−01
2.8454E+00
−3.5449E+00
1.5092E+00

R2
0.0000E+00
9.1462E−02
−5.7479E−02
−2.5044E−01
1.7992E+00
−3.8939E+00
3.7661E+00
−1.3637E+00

R3
−6.4481E−02
−1.3860E−01
−8.5614E−02
7.4193E−02
−6.1191E−02
−9.5849E−02
1.5053E−01
−1.0578E−01

R4
−1.2658E−02
−1.2320E−01
−3.3249E−02
−3.2026E−02
1.9728E−02
−4.0303E−03
−9.1683E−03
−2.5400E−03

R5
−8.6026E−01
8.1455E−03
−3.8714E−03
1.3259E−02
−1.2033E−03
−5.0453E−03
−1.4146E−03
−8.5110E−04

R6
−5.0601E−03
−3.2827E−02
1.0514E−02
−8.3891E−04
1.9610E−03
2.3076E−03
−1.0717E−03
−2.3399E−03

R7
0.0000E+00
−5.1802E−03
6.0032E−03
2.3083E−03
3.4377E−03
8.5416E−04
−2.3256E−03
7.7128E−04

R8
0.0000E+00
−2.1151E−02
−4.9050E−03
−5.8755E−03
5.5475E−03
2.1402E−03
1.9017E−03
1.6961E−04

R9
0.0000E+00
−3.3016E−02
4.7499E−03
1.2026E−03
−8.0514E−04
−3.6750E−04
−2.6570E−05
6.3537E−06

R10
−3.6441E+00
−4.3416E−02
1.7843E−02
1.4681E−03
−2.2173E−04
−5.9177E−05
−7.2324E−06
−1.5977E−06

R11
0.0000E+00
−9.2335E−03
−1.5072E−03
1.1892E−03
−2.0199E−05
−1.6786E−05
−2.0187E−06
3.7863E−07

R12
−6.8570E+00
−2.4497E−02
3.6319E−03
−3.4035E−04
3.7350E−07
2.2276E−06
−6.1466E−08
−9.0795E−09

Where, K is a conic coefficient, A4, A6, A8, A10, A12, A14, A16 are aspheric surface coefficients.

IH: Image height

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

For convenience, an 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 design data of inflexion points and arrest points of respective lens in the camera optical lens 10 according to Embodiment 1 of the present invention. P1R1 and P1R2 represent the object side surface and the image side surface of the first lens L1, P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, P5R1 and P5R2 represent the object side surface and the image side surface of the fifth lens L5, and P6R1 and P6R2 represent the object side surface and the image side surface of the sixth lens L6. The data in the column named“inflexion point position” refers to vertical distances from inflexion points arranged on each lens surface to the optical axis of the camera optical lens 10. The data in the column named “arrest point position” refers to vertical distances from arrest points arranged on each lens surface to the optical axis of the camera optical lens 10.

TABLE 3

Number of
Inflexion point
Inflexion point

inflexion points
position 1
position 2

P1R1
0
0
0

P1R2
0
0
0

P2R1
1
0.535
0

P2R2
1
0.605
0

P3R1
1
0.965
0

P3R2
1
1.025
0

P4R1
0
0
0

P4R2
1
0.965
0

P5R1
0
0
0

P5R2
1
1.065
0

P6R1
2
1.565
2.135

P6R2
1
0.785
0

TABLE 4

Number of arrest points
Arrest point position 1

P1R1
0
0

P1R2
0
0

P2R1
1
0.825

P2R2
1
0.925

P3R1
0
0

P3R2
0
0

P4R1
0
0

P4R2
1
1.155

P5R1
0
0

P5R2
0
0

P6R1
0
0

P6R2
1
2.015

FIG. 2 and FIG. 3 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 470 nm, 550 nm and 650 nm after passing the camera optical lens 10 according to Embodiment 1. FIG. 4 illustrates a field curvature and a distortion of light with a wavelength of 550 nm after passing the camera optical lens 10 according to Embodiment 1, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

Table 13 shows various values of Embodiments 1, 2 and 3 and values corresponding to parameters which are specified in the above conditions.

As shown in Table 13, Embodiment 1 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens 10 is 1.783 mm. The image height of 1.0H is 3.284 mm. The FOV is 83.05°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving 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 listed.

Table 5 and table 6 show the design data of a camera optical lens in Embodiment 2 of the present invention.

TABLE 5

R
d
nd
νd

S1
∞
d0=
0.000

R1
4.720
d1=
0.277
nd1
1.5449
ν1
55.93

R2
7.900
d2=
0.030

R3
1.826
d3=
0.210
nd2
1.6713
ν2
19.24

R4
1.718
d4=
0.144

R5
2.525
d5=
0.250
nd3
1.6713
ν3
19.24

R6
1.851
d6=
0.130

R7
3.392
d7=
0.509
nd4
1.5439
ν4
55.95

R8
−5.853
d8=
1.063

R9
−11.366
d9=
0.570
nd5
1.5449
ν5
55.93

R10
−1.121
d10=
0.281

R11
−12.817
d11=
0.418
nd6
1.5449
ν6
55.93

R12
1.164
d12=
1.087

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.100

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

TABLE 6

Conic

coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
0.0000E+00
4.8176E−02
1.1336E−01
−2.1616E−01
−6.3219E−01
2.8096E+00
−3.4664E+00
1.4561E+00

R2
0.0000E+00
2.3710E−02
−6.1064E−02
−2.3523E−01
1.7296E+00
−3.4396E+00
3.0863E+00
−1.0747E+00

R3
−1.5732E−01
−1.4090E−01
−1.0574E−01
1.2132E−01
−6.3311E−02
−1.0786E−01
1.6320E−01
−1.3112E−01

R4
−2.5615E−02
−1.2466E−01
−2.9180E−02
−3.2167E−02
1.6853E−02
−7.5597E−03
−1.6826E−02
3.6418E−03

R5
−1.9735E+01
−2.6807E−02
2.1480E−04
1.6336E−02
1.7036E−03
−4.5636E−03
−2.6381E−03
−2.6841E−03

R6
−6.5791E+00
−7.0638E−02
1.8973E−02
4.3940E−03
1.4338E−03
4.6855E−04
−9.0120E−04
−2.3333E−03

R7
0.0000E+00
−2.4424E−02
−5.7717E−03
−1.8462E−03
5.3489E−03
3.5746E−03
−1.1063E−03
−4.8688E−04

R8
0.0000E+00
−1.2223E−02
−3.0719E−03
−4.9014E−03
4.6555E−03
5.2458E−04
1.2382E−03
2.3139E−04

R9
0.0000E+00
−3.2948E−02
7.9344E−03
1.7732E−03
−9.3432E−04
−5.0017E−04
−1.2982E−05
5.7721E−05

R10
−4.1725E+00
−4.0596E−02
2.0591E−02
1.2620E−03
−5.7357E−04
−1.7540E−04
−1.2702E−05
1.3210E−05

R11
0.0000E+00
−9.4870E−03
−1.5414E−03
1.1897E−03
−2.3764E−05
−1.7204E−05
−1.9893E−06
3.8010E−07

R12
−6.2216E+00
−2.4251E−02
3.7056E−03
−3.3869E−04
1.0122E−06
2.3760E−06
−4.7271E−08
−1.0718E−08

Table 7 and table 8 show design data of inflexion points and arrest points of respective lens in the camera optical lens 20 according to Embodiment 2 of the present invention.

TABLE 7

Number of
Inflexion point
Inflexion point

inflexion points
position 1
position 2

P1R1
0
0
0

P1R2
0
0
0

P2R1
1
0.525
0

P2R2
1
0.595
0

P3R1
1
0.835
0

P3R2
1
0.675
0

P4R1
0
0
0

P4R2
1
0.985
0

P5R1
1
1.585
0

P5R2
1
1.005
0

P6R1
2
1.525
2.075

P6R2
1
0.785
0

TABLE 8

Number of arrest points
Arrest point position 1

P1R1
0
0

P1R2
0
0

P2R1
1
0.825

P2R2
1
0.905

P3R1
1
1.065

P3R2
1
1.135

P4R1
0
0

P4R2
1
1.185

P5R1
0
0

P5R2
1
1.785

P6R1
0
0

P6R2
1
2.205

FIG. 6 and FIG. 7 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 470 nm, 550 nm and 650 nm after passing the camera optical lens 20 according to Embodiment 2. FIG. 8 illustrates afield curvature and a distortion of light with a wavelength of 550 nm after passing the camera optical lens 10 according to Embodiment 2, in which afield curvature S is afield curvature in a sagittal direction and T is a field curvature in a tangential direction.

As shown in Table 13, Embodiment 2 satisfies the various conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 1.801 mm. The image height of 1.0H is 3.284 mm. The FOV is 80.33. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Tables 9 and 10 show design data of a camera optical lens 30 in Embodiment 3 of the present invention.

TABLE 9

R
d
nd
νd

S1
∞
d0=
−0.050

R1
3.920
d1=
0.276
nd1
1.5449
ν1
55.93

R2
5.272
d2=
0.030

R3
1.774
d3=
0.250
nd2
1.6510
ν2
21.51

R4
1.673
d4=
0.200

R5
7.080
d5=
0.240
nd3
1.6713
ν3
19.24

R6
3.326
d6=
0.045

R7
2.740
d7=
0.561
nd4
1.5439
ν4
55.95

R8
−7.070
d8=
1.072

R9
−8.982
d9=
0.532
nd5
1.5449
ν5
55.93

R10
−1.103
d10=
0.317

R11
−18.934
d11=
0.410
nd6
1.5449
ν6
55.93

R12
1.117
d12=
1.047

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.100

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

TABLE 10

Conic

coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
−6.5073E−01
5.8360E−02
1.1750E−01
−2.2393E−01
−6.3614E−01
2.7976E+00
−3.4987E+00
1.5031E+00

R2
−1.0039E+00
6.8186E−02
−8.3361E−02
−2.9510E−01
1.8503E+00
−3.8668E+00
3.6863E+00
−1.3420E+00

R3
−1.9500E−01
−1.4525E−01
−1.0357E−01
1.2689E−01
−6.2696E−02
−1.2048E−01
1.6302E−01
−9.7454E−02

R4
−6.6794E−01
−1.5410E−01
−2.8416E−02
−2.1314E−02
1.9798E−02
−1.7376E−02
−2.0442E−02
1.2450E−02

R5
−5.4021E+01
−3.0924E−02
−4.7035E−02
−1.7136E−02
−5.3923E−03
3.1645E−03
4.1749E−03
−9.6304E−03

R6
−3.8553E+00
−5.5491E−02
−8.5767E−03
−7.4896E−04
2.0191E−03
2.8885E−04
−2.8665E−03
−6.7581E−04

R7
−4.4358E+00
−3.2850E−02
8.2787E−03
−2.5073E−03
1.2729E−03
1.1800E−03
−1.3090E−03
2.8726E−04

R8
−2.6174E+00
−3.1403E−02
−9.3213E−03
−3.2872E−03
4.3878E−03
−1.8952E−04
4.9754E−04
1.8452E−04

R9
−9.0987E−01
−2.6983E−02
7.5245E−03
2.6060E−03
−7.6612E−04
−5.9665E−04
−7.1511E−05
7.5159E−05

R10
−4.0797E+00
−4.1012E−02
2.5625E−02
2.3198E−03
−6.9856E−04
−3.0522E−04
−4.4670E−05
2.5926E−05

R11
0.0000E+00
−1.0801E−02
−1.9210E−03
1.2053E−03
−1.3613E−05
−1.6906E−05
−2.0510E−06
3.6486E−07

R12
−5.8386E+00
−2.4302E−02
3.7634E−03
−3.4838E−04
−1.4537E−06
2.3110E−06
−1.8974E−08
−1.1799E−08

Table 11 and table 12 show Embodiment 3 design data of inflexion points and arrest points of respective lens in the camera optical lens 30 according to Embodiment 3 of the present invention.

TABLE 11

Number of
Inflexion point
Inflexion point

inflexion points
position 1
position 2

P1R1
0
0
0

P1R2
0
0
0

P2R1
1
0.535
0

P2R2
1
0.545
0

P3R1
1
0.415
0

P3R2
1
0.595
0

P4R1
1
1.085
0

P4R2
1
1.115
0

P5R1
1
1.575
0

P5R2
1
0.925
0

P6R1
2
1.565
2.085

P6R2
1
0.795
0

TABLE 12

Number of arrest points
Arrest point position 1

P1R1
0
0

P1R2
0
0

P2R1
1
0.835

P2R2
1
0.855

P3R1
1
0.655

P3R2
1
0.965

P4R1
0
0

P4R2
1
1.305

P5R1
0
0

P5R2
1
1.625

P6R1
0
0

P6R2
1
2.175

FIG. 10 and FIG. 11 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 470 nm, 550 nm and 650 nm after passing the camera optical lens 30 according to Embodiment 3. FIG. 12 illustrates a field curvature and a distortion of light with a wavelength of 550 nm after passing the camera optical lens 30 according to Embodiment 3, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

Table 13 in the following lists values corresponding to the respective conditions in this embodiment in order to satisfy the above conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 1.766 mm. The image height of 1.0H is 3.284 mm. The FOV is 81.11°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving excellent optical characteristics.

TABLE 13

Parameters

and conditions
Embodiment 1
Embodiment 2
Embodiment 3

f
3.638
3.781
3.779

f1
14.586
20.794
26.071

f2
−175.000
−200.013
−2000.000

f3
−10.128
−12.033
−9.488

f4
4.085
4.011
3.692

f5
2.374
2.231
2.244

f6
−2.051
−1.930
−1.915

f12
14.924
21.940
24.910

F
2.04
2.10
2.14

f1/f
4.01
5.50
6.90

R5/d5
16.71
10.10
29.50

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; the second lens has a negative refractive power, and the third lens has a negative refractive power;wherein the camera optical lens satisfies the following conditions: 4.00f1/f7.00; and10.00R5/d530.00;where,f: a focal length of the optical camera lens;f1: a focal length of the first lens;R5: a curvature radius of an object side surface of the third lens; andd5: an on-axis thickness of the third lens.
2. The camera optical lens according to claim 1 further satisfying the following conditions: 4.00f1/f6.95; and10.00R5/d529.75.
3. The camera optical lens according to claim 1, wherein, the first lens has a positive refractive power with a convex object side surface in a paraxial region and a concave image side surface in the paraxial region; the camera optical lens further satisfies the following conditions: −13.60(R1+R2)/(R1−R2)−1.17; and0.03d1/TTL0.08;where,R1: a curvature radius of the object side surface of the first lens;R2: a curvature radius of the image side surface of the first lens;d1: an on-axis thickness of the first lens; andTTL: a total optical length from the object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
4. The camera optical lens according to claim 3 further satisfying the following conditions: −8.50(R1+R2)/(R1−R2)−1.47; and0.04d1/TTL0.06.
5. The camera optical lens according to claim 1, wherein, the second lens has a convex object side surface in a paraxial region and a concave image side surface in the paraxial region; the camera optical lens satisfies the following conditions: −1058.59 f2/f−32.07;13.86(R3+R4)/(R3−R4)50.98; and0.02d3/TTL0.07;where,R3: a curvature radius of the object side surface of the second lens;R4: a curvature radius of the image side surface of the second lens;f2: a focal length of the second lens;d3: an on-axis thickness of the second lens; andTTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
6. The camera optical lens according to claim 5 further satisfying the following conditions: −661.62f2/f−40.09;22.18(R3+R4)/(R3−R4)40.79; and0.036 d3/TTL0.06.
7. The camera optical lens according to claim 1, wherein, the object side surface of the third lens being convex in a paraxial region and an image side surface of the third lens being concave in the paraxial region; and the camera optical lens satisfies the following conditions: −6.36f3/f−1.67;1.39(R5+R6)/(R5−R6)9.75; and0.02 d5/TTL0.07;where,R6: a curvature radius of the image side surface of the third lens;f3: a focal length of the third lens; andTTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
8. The camera optical lens according to claim 7 further satisfying the following conditions: −3.98 f3/f−2.09;2.22(R5+R6)/(R5−R6)7.80; and0.04d5/TTL0.06.
9. The camera optical lens according to claim 1, wherein, the fourth lens has a positive refractive power with a convex object side surface in a paraxial region and a convex image side surface in the paraxial region; the camera optical lens further satisfies the following conditions: 0.49f4/f1.68;−0.88(R7+R8)/(R7−R8)−0.18; and0.05d7/TTL0.17;where,R7: a curvature radius of the object side surface of the fourth lens;R8: a curvature radius of the image side surface of the fourth lens;f4: a focal length of the fourth lens;d7: an on-axis thickness of the fourth lens; andTTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
10. The camera optical lens according to claim 9 further satisfying the following conditions: 0.78 f4/f1.35;−0.55(R7+R8)/(R7−R8)−0.22; and0.08d7/TTL0.14.
11. The camera optical lens according to claim 1, wherein, the fifth lens has a positive refractive power with a concave object side surface in a paraxial region and a convex image side surface in the paraxial region; the camera optical lens further satisfies the following conditions: 0.296f5/f0.98;0.61(R9+R10)/(R9−R10)1.95; and0.05d9/TTL0.17;where,f5: a focal length of the fifth lens;R9: a curvature radius of the object side surface of the fifth lens;R10: a curvature radius of the image side surface of the fifth lens;d9: an on-axis thickness of the fifth lens; andTTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
12. The camera optical lens according to claim 11 further satisfying the following conditions: 0.47 f5/f0.78;0.98(R9+R10)/(R9−R10)1.56; and0.086 d9/TTL0.14.
13. The camera optical lens according to claim 1, wherein, the sixth lens has a negative refractive power with a concave object side surface in a paraxial region and a concave image side surface in the paraxial region; the camera optical lens further satisfies the following conditions: −1.13f6/f−0.34;0.35(R11+R12)/(R11−R12)1.33; and0.04d11/TTL0.13;where,f6: a focal length of the sixth lens;R11: a curvature radius of the object side surface of the sixth lens;R12: a curvature radius of the image side surface of the sixth lens;d1: an on-axis thickness of the sixth lens; andTTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
14. The camera optical lens according to claim 13 further satisfying the following conditions: −0.7f6/f−0.42;0.56(R11+R12)/(R11−R12)1.07; and0.06d11/TTL0.10.
15. The camera optical lens according to claim 1, wherein, a combined focal length of the first lens and the second lens is f12; the camera optical lens further satisfies the following conditions: 2.05f12/f9.89.
16. The camera optical lens according to claim 15 further satisfying the following conditions: 3.28f12/f7.91.
17. The camera optical lens as described in claim 1, wherein a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis is less than or equal to 5.82 millimeters.
18. The camera optical lens as described in claim 17, wherein the total optical length from the object side surface of the first lens of the camera optical lens to the image surface of the camera optical lens along the optical axis is less than or equal to 5.55 millimeters.
19. The camera optical lens as described in claim 1, wherein an F number of the camera optical lens is less than or equal to 2.20.
20. The camera optical lens as described in claim 19, wherein the F number of the camera optical lens is less than or equal to 2.16.

Priority Claims (1)

Number	Date	Country	Kind
201910581424.4	Jun 2019	CN	national

Camera Optical Lens

Information

Publication Number

Date Filed

Date Published

Inventors

Original Assignees

CPC

International Classifications

Abstract

Description

Claims

Priority Claims (1)