Camera optical lens

Description

FIELD OF THE PRESENT DISCLOSURE

The present disclosure relates to the field of optical lens, and more particularly, to a camera optical lens suitable for handheld terminal devices such as smart phones, digital cameras, and imaging device, such as monitor, 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, combined with the drawings. 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 can be implemented based on various changes and modifications to 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 six lenses. Specifically, from an object side to an image side, the camera optical lens 10 comprises in sequence: an aperture S, 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 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 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.

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

Here, a focal length of the first lens L1 is defined as f1, and a focal length of the third lens L3 is defined as f3. The camera optical lens 10 satisfies the following condition: 2.00≤f1/f≤5.00, which specifies a ratio of the focal length f1 of the first lens L1 to the focal length f3 of the third lens L3, The focal length is reasonably distributed so that the camera optical lens has a good imaging quality and a lower sensitivity. Preferably, the following condition shall be satisfied, 2.00≤f1/f3≤4.65.

A curvature radius of an object side surface of the third lens L3 is defined as R5, a curvature radius of an image side surface of the third lens L3 is defined as R6. The camera optical lens 10 satisfies the following condition: −16.00≤R5/R6≤−10.00, which specifies a ratio of the curvature radius of the object side surface of the third lens to the image side surface of the third lens. When the value is within the range, as the camera optical lens develops toward ultra-thin and wide-angle, it is beneficial for correcting the problem of an off-axis abberation. Preferably, the following condition shall be satisfied, −15.00≤R5/R6≤−10.00.

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 camera optical lens 10 of the present invention, the focal length of the first lens, the focal length of the third lens, the curvature radius of the object side surface of the third lens, and the curvature radius of the image side surface of the third lens satisfy the above conditions, the camera optical lens 10 has the advantage of high performance and meets the design requirement on ultra-thin, wide-angle and large aperture.

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

A focal length of the camera optical lens 10 is defined as f, and the focal length of the first lens L1 is defined as f1. The camera optical lens satisfies the following condition: 1.03≤f1/f≤5.59, which defines a ratio of the focal length f1 of the first lens L1 to the focal length f of the camera optical lens 10. In this way, the first lens has the appropriate positive refractive power, thereby facilitating reducing an aberration of the system while facilitating a development towards ultra-thin and wide-angle lenses. Preferably, the following condition shall be satisfied, 1.64≤f1/f≤4.47.

A curvature radius of the object side surface of the first lens L1 is R1, a curvature radius of the image side surface of the first lens L1 is R2, and the camera optical lens 10 satisfies: −19.60≤(R1+R2)/(R1−R2)≤−2.79, and this condition reasonably controls a shape of the first lens, so that the first lens can effectively correct a spherical aberration of the system. Preferably, the following condition shall be satisfied, −12.25≤(R1+R2)/(R1−R2)≤−3.49.

An on-axis thickness of the first lens L1 is d1, and the camera optical lens 10 satisfies the following condition: 0.06≤d1/TTL≤0.31, which is beneficial for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.10≤d1/TTL≤0.25.

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

The focal length of the camera optical lens 10 is f, a focal length of the second lens L2 is f2, and the camera optical lens 10 satisfies the following condition: −89.44≤f2/f≤−26.34, which is beneficial for correcting the aberration of the optical system by controlling the negative refractive power of the second lens L2 being within a reasonable range. Preferably, the following condition shall be satisfied, −55.90≤f2/f≤−32.93.

A curvature radius of the object side surface of the second lens L2 is R3, and a curvature radius of the image side surface of the second lens L2 is R4, and the camera optical lens 10 satisfies the following condition: 11.95≤(R3+R4)/(R3−R4)≤36.11, which specifies 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 for correcting the problem of the abberation. Preferably, the following condition shall be satisfied, 19.12≤(R3+R4)/(R3−R4)≤28.89.

An on-axis thickness of the second lens L2 is d3, and the camera optical lens 10 satisfies the following condition: 0.02≤d3/TTL≤0.07, which is beneficial for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.03≤d3/TTL≤0.06.

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

The focal length of the camera optical lens 10 is f, a focal length of the third lens L3 is f3, and the camera optical lens 10 satisfies the following condition: 0.43≤f3/f≤1.54. The refractive power is reasonably distributed so that the camera optical lens has the good imaging quality and lower sensitivity. Preferably, the following condition shall be satisfied, 0.69≤f3/f≤1.23.

A curvature radius of the object side surface of the third lens L3 is R5, a curvature radius of the image side surface of the third lens L3 is R6, and the camera optical lens 10 satisfies the following condition: 0.414≤(R5+R6)/(R5−R6)≤1.30, which can effectively control a shape of the third lens L3. It is beneficial for the shaping the third lens L3, and the bad shaping and stress generation due to extra large surface curvature of the third lens L3 can be avoided. Preferably, the following condition shall be satisfied, 0.65≤(R5+R6)/(R5−R6)≤1.04.

An on-axis thickness of the third lens L3 is d5, and the camera optical lens 10 satisfies the following condition: 0.04≤d5/TTL≤0.16, which is beneficial for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.07≤d5/TTL≤0.13.

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 concave in the paraxial region, and the fourth lens L4 has a negative refractive power.

The focal length of the camera optical lens 10 is f, a focal length of the fourth lens L4 is f4, and the camera optical lens 10 satisfies: −2.93≤f4/f≤−0.86. The refractive power is reasonably distributed so that the system has the good imaging quality and lower sensitivity. Preferably, the following condition shall be satisfied, −1.836 f4/f≤−1.08.

A curvature radius of the object side surface of the fourth lens L4 is R7, and a curvature radius of the image side surface of the fourth lens L4 is R8, and the camera optical lens 10 satisfies: 1.25 (R7+R8)/(R7−R8)≤4.15, which specifies a shape of the fourth lens L4. When the value is within the range, as the camera optical lens develops toward ultra-thin and wide-angle, it is beneficial for correcting the problem of the off-axis abberation. Preferably, the following condition shall be satisfied, 2.00≤(R7+R8)/(R7−R8)≤3.32.

An on-axis thickness of the fourth lens L4 is d7, and the camera optical lens 10 satisfies the following condition: 0.02≤d7/TTL≤0.08, which is beneficial for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.03≤d7/TTL≤0.06.

In the embodiment, an object side surface of the fifth lens L5 is convex 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 f, a focal length of the fifth lens L5 is f5, and the camera optical lens 10 satisfies the following condition: 0.36≤f5/f≤1.36, which can effectively make a light angle of the camera lens be gentle, and reduce a tolerance sensitivity. Preferably, the following condition shall be satisfied, 0.58≤f5/f≤1.08.

A curvature radius of the object side surface of the fifth lens L5 is R9, and a curvature radius of the image side surface of the fifth lens L5 is R10, and the camera optical lens 10 satisfies the following condition: 0.22≤(R9+R10)/(R9−R10)≤1.07, which specifies a shape of the fifth lens L5. When the value is within the range, as the camera optical lens develops toward ultra-thin and wide-angle, it is beneficial for correcting the problem of the off-axis abberation. Preferably, the following condition shall be satisfied, 0.35≤(R9+R10)/(R9−R10)≤0.86.

An on-axis thickness of the fifth lens L5 is d9, the camera optical lens 10 satisfies the following condition: 0.09≤d9/TTL≤0.28, which is beneficial for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.14≤d9/TTL≤0.22.

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 f, a focal length of the sixth lens L6 is f6, the camera optical lens 10 satisfies the following condition: −1.66≤f6/f≤−0.43. The refractive power is reasonably distributed so that the system has the good imaging quality and lower sensitivity. Preferably, the following condition shall be satisfied, −1.04≤f6/f≤−0.54.

A curvature radius of the object side surface of the sixth lens L6 is R11, a curvature radius of the image side surface of the sixth lens L6 is R12, and the camera optical lens 10 satisfies the following condition: 0.04≤(R11+R12)/(R11−R12)≤1.06, which specifies a shape of the sixth lens L6. When the value is within the range, as the camera optical lens develops toward ultra-thin and wide-angle, it is beneficial for correcting the problem of the off-axis abberation. Preferably, the following condition shall be satisfied, 0.07≤(R11+R12)/(R11−R12)≤0.85.

An on-axis thickness of the sixth lens L6 is d1, the camera optical lens 10 satisfies the following condition: 0.04≤d11/TTL≤0.15, which is beneficial for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.07≤d11/TTL≤0.12.

In this embodiment, the focal length of camera optical lens 10 is f, a combined focal length of the first lens L1 and the second lens L2 is f12, and the camera optical lens 10 satisfies following condition: 1.05≤f12/f≤6.03. With such configuration, the aberration and distortion of the camera optical lens can be eliminated while suppressing a back focal length of the camera optical lens, thereby maintaining miniaturization of the camera lens system. Preferably, the following condition shall be satisfied, 1.69≤f12/f≤4.83.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 7.96 mm, and it is beneficial for developing ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 7.59 mm.

In this embodiment, an F number of the camera optical lens 10 is less than or equal to 1.81. The camera optical lens 10 has a better imaging performance. Preferably, the F number of the camera optical lens 10 is less than or equal to 1.78.

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

TABLE 1

R
d
nd
νd

S1
∞
d0=
−0.343

R1
2.746
d1=
1.363
nd1
1.5444
ν1
55.82

R2
4.471
d2=
0.157

R3
11.101
d3=
0.312
nd2
1.6700
ν2
19.39

R4
10.216
d4=
0.135

R5
41.528
d5=
0.585
nd3
1.5444
ν3
55.82

R6
−2.966
d6=
0.004

R7
5.117
d7=
0.258
nd4
1.6449
ν4
22.54

R8
2.402
d8=
0.475

R9
12.986
d9=
1.226
nd5
1.5444
ν5
55.82

R10
−2.248
d10=
0.429

R11
−5.759
d11=
0.575
nd6
1.5444
ν6
55.82

R12
2.606
d12=
0.562

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.266

where, meaning of the various symbols will be described 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 the aspherical surface data of the camera optical lens 10 in the embodiment 1 of the present invention.

TABLE 2

Conic coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12

R1
6.5330E−03
4.8976E−16
−5.7054E−15
2.5733E−14
−5.8711E−14
7.5298E−14

R2
1.1889E+00
1.6377E−15
−2.0155E−14
9.5135E−14
−2.3054E−13
3.2021E−13

R3
2.3018E+01
−1.4425E−02
9.5302E−03
−1.1947E−02
1.2029E−02
−7.5029E−03

R4
3.8143E+01
−1.5487E−02
1.6409E−02
−3.3505E−02
5.1989E−02
−4.8693E−02

R5
2.0000E+02
−8.2350E−03
−4.2105E−03
1.2216E−02
−1.9438E−02
1.6419E−02

R6
−4.2239E+01
−3.1455E−02
1.7663E−02
−3.8533E−03
−1.0463E−02
1.1487E−02

R7
6.4175E−01
−2.3315E−02
8.9095E−03
−3.5455E−03
1.0999E−03
−2.6938E−04

R8
−1.6370E+01
−4.1449E−17
5.6186E−17
−1.2259E−17
1.9025E−17
−3.5366E−17

R9
−2.0000E+02
1.1269E−02
−8.6552E−03
4.0487E−03
−1.3492E−03
2.8805E−04

R10
−2.5283E+00
1.6015E−02
−4.7782E−03
1.6113E−03
−4.1254E−04
6.7948E−05

R11
−4.7083E+00
−2.1629E−02
3.7348E−03
−3.8257E−04
5.7288E−05
−7.5444E−06

R12
−7.3600E+00
−1.3617E−02
2.5526E−03
−3.9665E−04
4.4944E−05
−3.5581E−06

Aspherical surface coefficients

A14
A16
A18
A20

R1
−5.6589E−14
2.4715E−14
−5.8074E−15
5.6766E−16

R2
−2.6507E−13
1.2920E−13
−3.4209E−14
3.7942E−15

R3
2.8884E−03
−6.7393E−04
8.7848E−05
−4.9424E−06

R4
2.7174E−02
−8.7975E−03
1.5057E−03
−1.0462E−04

R5
−8.3780E−03
2.5741E−03
−4.4216E−04
3.3114E−05

R6
−5.7989E−03
1.6149E−03
−2.3871E−04
1.4767E−05

R7
5.1998E−05
−7.0075E−06
5.7461E−07
−2.2335E−08

R8
2.1201E−17
−5.7731E−18
7.4679E−19
−3.7371E−20

R9
−3.8832E−05
3.1551E−06
−1.3931E−07
2.5515E−09

R10
−7.1507E−06
4.6565E−07
−1.7043E−08
2.6705E−10

R11
5.9216E−07
−2.6267E−08
6.1704E−10
−6.0024E−12

R12
1.8594E−07
−6.0120E−09
1.0854E−10
−8.3711E−13

Where, K is a conic index, A4, A6, A8, A10, A12, A14, A16, A18, A20 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+A18x¹⁸+A20x²⁰ (1)

For convenience, an aspheric surface of each lens surface uses the is aspheric surfaces shown in the above formula (1). However, the present disclosure is not limited to the aspherical polynomials form shown in the formula (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 points
position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
1
0.485

P3R2
0

P4R1
0

P4R2
0

P5R1
1
1.265

P5R2
0

P6R1
1
2.095

P6R2
1
1.125

TABLE 4

Number of
Arrest point

arrest points
position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
1
0.815

P3R2
0

P4R1
0

P4R2
0

P5R1
1
1.935

P5R2
0

P6R1
0

P6R2
1
2.885

FIG. 2 and FIG. 3 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 10 according to Embodiment 1. FIG. 4 illustrates a field curvature and a distortion schematic diagrams of light with a wavelength of 656 nm after passing the camera optical lens 10 according to Embodiment 1, in which field curvature S is the field curvature in a sagittal direction and T is the field curvature in a tangential direction.

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

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

In this embodiment, an entrance pupil diameter of the camera optical lens is 2.830 mm. An image height of 1.0H is 4.000 mm. A FOV is 76.97°. 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=
−0.362

R1
2.815
d1=
0.941
nd1
1.5444
ν1
55.82

R2
3.778
d2=
0.262

R3
11.049
d3=
0.243
nd2
1.6700
ν2
19.39

R4
10.162
d4=
0.167

R5
34.379
d5=
0.664
nd3
1.5444
ν3
55.82

R6
−2.714
d6=
0.050

R7
5.621
d7=
0.341
nd4
1.6449
ν4
22.54

R8
2.411
d8=
0.687

R9
8.746
d9=
1.307
nd5
1.5444
ν5
55.82

R10
−3.458
d10=
0.721

R11
−5.285
d11=
0.696
nd6
1.5444
ν6
55.82

R12
4.463
d12=
0.362

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.386

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 coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12

R1
−3.2806E−01
−1.7837E−03
1.4827E−02
−4.5816E−02
7.4635E−02
−7.1391E−02

R2
−1.8008E+00
−8.2853E−03
5.0125E−02
−1.3770E−01
2.1559E−01
−2.0146E−01

R3
2.3441E+00
−1.6710E−02
9.5904E−03
8.1984E−03
−6.8782E−02
1.3494E−01

R4
4.0571E+01
−2.9331E−02
8.8319E−02
−2.2955E−01
3.5421E−01
−3.3343E−01

R5
2.6765E+02
−3.6365E−04
−5.4101E−02
1.7890E−01
−2.9860E−01
2.8879E−01

R6
−2.4192E+01
−3.3298E−02
4.6543E−02
−9.1506E−02
1.2105E−01
−1.0104E−01

R7
2.2234E+00
−1.2293E−03
−3.9757E−02
6.2711E−02
−5.3331E−02
2.7880E−02

R8
−1.4075E+01
−1.4514E−02
4.6137E−02
−6.6966E−02
5.5055E−02
−2.7518E−02

R9
−1.8739E+02
1.6149E−02
−8.2500E−03
−3.4240E−03
5.8364E−03
−3.1188E−03

R10
−1.2184E+00
4.1319E−03
−5.9036E−03
6.0096E−03
−3.4390E−03
1.1617E−03

R11
6.9456E−01
−3.8639E−02
2.8897E−02
−2.3493E−02
1.2302E−02
−3.8922E−03

R12
−1.1417E+01
−1.2749E−02
2.4727E−03
−4.9635E−04
1.1350E−04
−2.1880E−05

Aspherical surface coefficients

A14
A16
A18
A20

R1
4.1377E−02
−1.4294E−02
2.7037E−03
−2.1495E−04

R2
1.1193E−01
−3.5350E−02
5.5048E−03
−2.6726E−04

R3
−1.3107E−01
6.9474E−02
−1.9305E−02
2.2105E−03

R4
1.9550E−01
−6.9870E−02
1.3949E−02
−1.1964E−03

R5
−1.7000E−01
6.0138E−02
−1.1762E−02
9.7790E−04

R6
5.2148E−02
−1.6190E−02
2.7724E−03
−2.0106E−04

R7
−9.1881E−03
1.8619E−03
−2.1189E−04
1.0364E−05

R8
8.5263E−03
−1.6006E−03
1.6682E−04
−7.4108E−06

R9
8.9288E−04
−1.4695E−04
1.3131E−05
−4.9444E−07

R10
−2.3353E−04
2.6870E−05
−1.5789E−06
3.4317E−08

R11
7.5672E−04
−8.8609E−05
5.7371E−06
−1.5788E−07

R12
2.8023E−06
−2.1613E−07
9.0506E−09
−1.5774E−10

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

TABLE 7

Number of
Inflexion point
Inflexion point

inflexion points
position 1
position 2

P1R1
0

P1R2
0

P2R1
2
1.085
1.335

P2R2
0

P3R1
1
0.765

P3R2
0

P4R1
0

P4R2
1
1.825

P5R1
1
1.095

P5R2
0

P6R1
2
2.115
2.635

P6R2
1
1.095

TABLE 8

Number of
Arrest point

arrest points
position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
1
1.105

P3R2
0

P4R1
0

P4R2
0

P5R1
1
1.775

P5R2
0

P6R1
0

P6R2
1
2.715

FIG. 6 and FIG. 7 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 20 according to Embodiment 2. FIG. 8 illustrates a field curvature and a distortion of light with a wavelength of 656 nm after passing the camera optical lens 10 according to Embodiment 2, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

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

In this embodiment, the entrance pupil diameter of the camera optical lens is 2.978 mm. The image height of IH is 4.00 mm. The FOV is 74.17°. 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, the meaning of its symbols is the same as that of Embodiment 1, in the following, only the differences are listed.

The design information of a camera optical lens 30 in Embodiment 3 of the present invention is shown in the tables 9 and 10.

TABLE 9

R
d
nd
νd

S1
∞
d0=
−0.368

R1
2.974
d1=
0.882
nd1
1.5444
ν1
55.82

R2
3.651
d2=
0.276

R3
11.101
d3=
0.250
nd2
1.6700
ν2
19.39

R4
10.216
d4=
0.134

R5
27.868
d5=
0.780
nd3
1.5444
ν3
55.82

R6
−2.787
d6=
0.050

R7
5.849
d7=
0.368
nd4
1.6449
ν4
22.54

R8
2.602
d8=
0.674

R9
16.081
d9=
1.300
nd5
1.5444
ν5
55.82

R10
−2.659
d10=
0.577

R11
−14.543
d11=
0.722
nd6
1.5444
ν6
55.82

R12
2.473
d12=
0.662

R13
∞
d13=
0.210
ndg
1.5168
νg
64.17

R14
∞
d14=
0.348

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 coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12

R1
−3.5846E−01
−1.0271E−15
1.0210E−14
−4.0052E−14
8.1265E−14
−9.4569E−14

R2
−1.4194E+00
−3.4975E−16
3.7909E−15
−1.5523E−14
3.1844E−14
−3.6004E−14

R3
−2.7075E+01
−1.4783E−02
1.0418E−02
−1.4858E−02
1.5798E−02
−1.0406E−02

R4
3.7334E+01
−1.5543E−02
1.6773E−02
−3.5899E−02
5.6673E−02
−5.4004E−02

R5
2.0000E+02
−2.7849E−03
−1.823 IE−03
3.2310E−03
−3.6869E−03
2.2334E−03

R6
−1.9293E+01
−2.7176E−02
1.3248E−02
−2.4842E−03
−6.0447E−03
5.9464E−03

R7
2.6284E+00
−1.3731E−02
3.8842E−03
−1.1047E−03
2.5604E−04
−4.6850E−05

R8
−1.3291E+01
−3.6107E−16
1.6536E−15
−2.8168E−15
2.4351E−15
−1.2024E−15

R9
−2.0000E+02
9.1508E−03
−4.4847E−03
1.6620E−03
−4.4333E−04
7.5764E−05

R10
−5.3427E+00
1.4942E−04
1.8183E−04
2.4451E−05
−2.1972E−06
1.2702E−07

R11
2.3036E+01
−1.6402E−02
1.5376E−03
−7.7315E−05
7.7624E−06
−6.8540E−07

R12
−6.1771E+00
−1.3021E−02
2.6022E−03
−4.2466E−04
4.8946E−05
−3.9416E−06

Aspherical surface coefficients

A14
A16
A18
A20

R1
6.5478E−14
−2.6627E−14
5.8660E−15
−5.3985E−16

R2
2.2924E−14
−7.8616E−15
1.2320E−15
−4.6742E−17

R3
4.2303E−03
−1.0423E−03
1.4348E−04
−8.5246E−06

R4
3.0662E−02
−1.0100E−02
1.7587E−03
−1.2432E−04

R5
−8.1726E−04
1.8007E−04
−2.2182E−05
1.1913E−06

R6
−2.6898E−03
6.7120E−04
−8.8907E−05
4.9282E−06

R7
6.7563E−06
−6.8027E−07
4.1675E−08
−1.2102E−09

R8
3.5400E−16
−6.1497E−17
5.8193E−18
−2.3129E−19

R9
−8.1754E−06
5.3170E−07
−1.8792E−08
2.7549E−10

R10
−4.6914E−09
1.0722E−10
−1.3774E−12
7.5752E−15

R11
3.6070E−08
−1.0728E−09
1.6896E−11
−1.1020E−13

R12
2.0953E−07
−6.8912E−09
1.2655E−10
−9.9282E−13

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

TABLE 11

Number of
Inflexion point

inflexion points
position 1

P1R1
0

P1R2
0

P2R1
1
0.835

P2R2
0

P3R1
1
1.005

P3R2
0

P4R1
0

P4R2
0

P5R1
1
1.735

P5R2
1
1.735

P6R1
0

P6R2
1
1.225

TABLE 12

Number of
Arrest point

arrest points
position 1

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
1
1.495

P3R2
0

P4R1
0

P4R2
0

P5R1
1
2.465

P5R2
0

P6R1
0

P6R2
1
2.975

FIG. 10 and FIG. 11 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 486 nm, 588 nm and 656 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 656 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.

The following table 13, in accordance with the above conditions, lists the values in this embodiment corresponding to each condition expression. Apparently, the camera optical of this embodiment satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 3.082 mm. The image height of 1.0H is 4.000 mm. The FOV is 72.38°. 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
4.977
5.212
5.394

f1
10.224
15.013
20.106

f2
−222.564
−209.760
−213.144

f3
5.109
4.6303
4.676

f4
−7.291
−6.760
−7.532

f5
3.622
4.711
4.279

f6
−3.218
−4.317
−3.809

f12
10.485
15.840
21.695

FNO
1.76
1.75
1.75

f1/f3
2.00
3.24
4.30

R5/R6
−14.00
−12.67
−10.00

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 positive refractive power;wherein the camera optical lens satisfies the following conditions: 2.00≤f1/f3≤5.00; and−16.00≤R5/R6≤−10.00;wheref1: a focal length of the first lens;f3: a focal length of the third lens;R5: a curvature radius of an object side surface of the third lens; andR6: a curvature radius of an image side surface of the third lens.
2. The camera optical lens according to claim 1 further satisfying the following conditions: 2.00≤f1/f3≤4.65; and−15.00≤R5/R6≤−10.00.
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: 1.03≤f1/f≤5.59;−19.60≤(R1+R2)/(R1−R2)≤−2.79; and0.06≤d1/TTL≤0.31;wheref: a focal length of the camera optical lens;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 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: 1.64≤f1/f≤4.47;−12.25≤(R1+R2)/(R1−R2)≤−3.49; and0.10≤d1/TTL≤0.25.
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: −89.44≤f2/f≤−26.34;11.95≤(R3+R4)/(R3−R4)≤36.11; and0.02≤d3/TTL≤0.07;wheref: a focal length of the camera optical lens;f2: a focal length of the second lens;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;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: −55.90≤f2/f≤−32.93;19.12≤(R3+R4)/(R3−R4)≤28.89; and0.03≤d3/TTL≤0.06.
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 the image side surface of the third lens being convex in the paraxial region; and the camera optical lens satisfies the following conditions: 0.43≤f3/f≤1.54;0.41≤(R5+R6)/(R5−R6)≤1.30; and0.04≤d5/TTL≤0.16;wheref: a focal length of the camera optical lens;d5: an on-axis thickness 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: 0.69≤f3/f≤1.23;0.65≤(R5+R6)/(R5−R6)≤1.04; and0.07≤d5/TTL≤0.13.
9. The camera optical lens according to claim 1, wherein, the fourth lens has a negative 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: −2.93≤f4/f≤−0.86;1.25≤(R7+R8)/(R7−R8)≤4.15; and0.02≤d7/TTL≤0.08;wheref: a focal length of the camera optical lens;f4: a focal length of the fourth lens;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;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: −1.83≤f4/f≤−1.08;2.00≤(R7+R8)/(R7−R8)≤3.32; and0.03≤d7/TTL≤0.06.
11. The camera optical lens according to claim 1, wherein, the fifth 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: 0.36≤f5/f≤1.36;0.22≤(R9+R10)/(R9−R10)≤1.07; and0.09≤d9/TTL≤0.28;wheref: a focal length of the camera optical lens;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 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: 0.58≤f5/f≤1.08;0.35≤(R9+R10)/(R9−R10)≤0.86; and0.14≤d9/TTL≤0.22.
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: −1.66≤f6/f≤−0.43;0.04≤(R11+R12)/(R11−R12)≤1.06; and0.04≤d11/TTL≤0.15;wheref: a focal length of the camera optical lens;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;d11: 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: −1.04≤f6/f≤−0.54;0.07≤(R11+R12)/(R11−R12)≤0.85; and0.07≤d11/TTL≤0.12.
15. The camera optical lens according to claim 1, wherein, a combined focal length of the first lens and the second lens is f12; a focal length of the optical camera lens is f; and the camera optical lens further satisfies the following conditions: 1.05≤f12/f≤6.03.
16. The camera optical lens according to claim 15 further satisfying the following conditions: 1.69≤f12/f≤4.83.
17. The camera optical lens as described in claim 1, wherein a total optical length TTL 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 7.96 millimeters.
18. The camera optical lens as described in claim 17, wherein the total optical length TTL 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 7.59 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 1.81.
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 1.78.

Priority Claims (1)

Number	Date	Country	Kind
201910582030.0	Jun 2019	CN	national

US Referenced Citations (5)

Number	Name	Date	Kind
20130329306	Tsai	Dec 2013	A1
20140139933	Chen	May 2014	A1
20150009578	Shinohara	Jan 2015	A1
20150253541	Hsu	Sep 2015	A1
20160103299	Lin	Apr 2016	A1

Related Publications (1)

	Number	Date	Country
	20200409099 A1	Dec 2020	US

Camera optical lens

Information

Patent Number

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Date Issued

Inventors

Original Assignees

Examiners

Agents

CPC

Field of Search

US

International Classifications

Term Extension

Abstract

Description

Claims

Priority Claims (1)

US Referenced Citations (5)

Related Publications (1)