CAMERA OPTICAL LENS

Description

TECHNICAL FIELD

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 or digital cameras, and imaging devices, such as monitors or PC lenses.

BACKGROUND

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, wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

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

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 disclosure;

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 disclosure;

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.

DESCRIPTION OF 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

Referring to FIG. 1, the present disclosure provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment 1 of the present disclosure. The camera optical lens 10 includes 7 lenses. Specifically, the camera optical lens 10 includes, from an object side to an image side, an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7. An optical element such as an optical filter GF can be arranged between the seventh lens L7 and an image plane Si.

The first lens L1 is made of a plastic material, the second lens L2 is made of a plastic material, the third lens L3 is made of a plastic material, the fourth lens L4 is made of a glass material, the fifth lens L5 is made of a glass material, the sixth lens L6 is made of a plastic material, and the seventh lens L7 is made of a 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 10 should satisfy a condition of 1.51 camera opt, which specifies a ratio of the focal length f1 of the first lens L1 and the focal length f of the camera optical lens 10. If the lower limit of the specified value is exceeded, although it would facilitate development of ultra-thin lenses, the positive refractive power of the first lens L1 will be too strong, and thus it is difficult to correct the problem like an aberration and it is also unfavorable for development of wide-angle lenses. On the contrary, if the upper limit of the specified value is exceeded, the positive refractive power of the first lens L1 would become too weak, and it is then difficult to develop ultra-thin lenses. Preferably, 1.51≤f1/f≤2.42.

A refractive index of the fourth lens L4 is defined as n4, where 1.70≤n4≤2.20, which specifies the refractive index of the fourth lens L4. The refractive index within this range facilitates development of ultra-thin lenses, and also facilitates correction of the aberration. Preferably, 1.70≤n4≤1.97.

A focal length of the third lens L3 is defined as f3, and a focal length of the fourth lens L4 is defined as f4. The camera optical lens 10 should satisfy a condition of 2.00≤f3/f4≤5.00, which specifies a ratio of the focal length f3 of the third lens L3 and the focal length f4 of the fourth lens L4. This can effectively reduce the sensitivity of optical lens group used in the camera and further enhance the imaging quality. Preferably, 2.00≤f3/f4≤4.99.

A curvature radius of an object side surface of the seventh lens L7 is defined as R13, and a curvature radius of an image side surface of the seventh lens L7 is defined as R14. The camera optical lens 10 further satisfies a condition of −10.00tion surface of the sevent, which specifies a shape of the seventh lens L7. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem like an off-axis aberration. Preferably, −4.63≤(R13+R14)/(R13−R14)≤5.67.

A refractive index of the fifth lens L5 is defined as n5, where 1.70≤n5≤2.20, which specifies the refractive index of the fifth lens L5. The refractive index within this range facilitates development of ultra-thin lenses, and also facilitates correction of the aberration. Preferably, 1.70≤n5≤2.00.

A total optical length from an object side surface of the first lens L1 to an image plane of the camera optical lens 10 along an optic axis is defined as TTL. When the focal length of the camera optical lens, the focal length of the first lens, the focal length of the third lens, the focal length of the fourth lens, the refractive index of the fourth lens, the refractive index of the fifth lens, the curvature radius of the object side surface of the seventh lens and the curvature radius of the image side surface of the seventh lens satisfy the above conditions, and the camera optical lens will have the advantage of high performance and satisfy the design requirement of a low TTL.

In this embodiment, the object side surface of the first lens L1 is convex in a paraxial region, an image side surface of the first lens L1 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 10 further satisfies a condition of −19.09≤(R1+R2)/(R1−R2)≤−2.94. This can reasonably control a shape of the first lens L1 in such a manner that the first lens L1 can effectively correct a spherical aberration of the camera optical lens. Preferably, −11.93≤(R1+R2)/(R1−R2)≤−3.67.

An on-axis thickness of the first lens L1 is defined as d1. The camera optical lens 10 further satisfies a condition of 0.07≤d1/TTL≤0.22. This facilitates achieving ultra-thin lenses. Preferably, 0.11≤d1/TTL≤0.17.

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

The focal length of the camera optical lens 10 is f, and a focal length of the second lens L2 is f2. The camera optical lens 10 further satisfies a condition of 1.08≤f2/f≤7.41 By controlling the positive refractive power of the second lens L2 within the reasonable range, correction of the aberration of the optical system can be facilitated. Preferably, 1.74≤f2/f≤5.92.

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 10 further satisfies a condition of −35.01≤(R3+R4)/(R3−R4)≤−6.14, which specifies a shape of the second lens L2. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem of the aberration. Preferably, −21.88≤(R3+R4)/(R3−R4)≤−7.67.

An on-axis thickness of the second lens L2 is defined as d3. The camera optical lens 10 further satisfies a condition of 0.03≤d3/TTL≤0.08. This facilitates achieving ultra-thin lenses. Preferably, 0.04≤d3/TTL≤0.06.

In this embodiment, the third lens L3 has a positive refractive power.

The focal length of the camera optical lens 10 is f, and a focal length of the third lens L3 is f3. The camera optical lens 10 further satisfies a condition of 6.06≤f3/f≤30.54. When the condition is satisfied, the field curvature of the system can be effectively balanced for further improving the image quality. Preferably, 9.69≤f3/f≤24.43.

A curvature radius of an object side surface of the third lens L3 is defined as R5, and a curvature radius of an image side surface of the third lens L3 is defined as R6. The camera optical lens 10 further satisfies a condition of −2.21≤(R5+R6)/(R5−R6)≤5.23. 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, −1.38≤(R5+R6)/(R5−R6)≤4.18.

An on-axis thickness of the third lens L3 is defined as d5. The camera optical lens 10 further satisfies a condition of 0.03≤d5/TTL≤0.10. This facilitates achieving ultra-thin lenses. Preferably, 0.05≤d5/TTL≤0.08.

In this 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 positive refractive power.

The focal length of the camera optical lens 10 is f, and a focal length of the fourth lens L4 is f4. The camera optical lens 10 further satisfies a condition of 1.90≤f4/f≤9.08. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, 3.03≤f4/f≤7.27.

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 10 further satisfies a condition of −3.13≤(R7+R8)/(R7−R8)≤−0.80, which specifies a shape of the fourth lens L4. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem like an off-axis aberration. Preferably, −1.96≤(R7+R8)/(R7−R8)≤−1.00.

An on-axis thickness of the fourth lens L4 is defined as d7. The camera optical lens 10 further satisfies a condition of 0.03≤d7/TTL≤0.09. This facilitates achieving ultra-thin lenses. Preferably, 0.05≤d7/TTL≤0.08.

In this 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 negative refractive power.

The focal length of the camera optical lens 10 is f, and a focal length of the fifth lens L5 is f5. The camera optical lens 10 further satisfies a condition of −21.10≤f5/f≤−2.13. This can effectively make a light angle of the camera lens gentle and reduce the tolerance sensitivity. Preferably, −13.19≤f5/f≤−2.66.

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 10 further satisfies a condition of −32.40≤(R9+R10)/(R9−R10)≤−4.99, which specifies a shape of the fifth lens L5. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem like an off-axis aberration. Preferably, −20.25≤(R9+R10)/(R9−R10)≤−6.23.

An on-axis thickness of the fifth lens L5 is defined as d9. The camera optical lens 10 further satisfies a condition of 0.03≤d9/TTL≤0.09. This facilitates achieving ultra-thin lenses. Preferably, 0.05≤d9/TTL≤0.07.

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

The focal length of the camera optical lens 10 is f, and a focal length of the sixth lens L6 is f6. The camera optical lens 10 further satisfies a condition of 0.42≤f6/f≤1.71. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, 0.67≤f6/f≤1.37.

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 10 further satisfies a condition of −1.99≤(R11+R12)/(R11−R12)≤0.29, which specifies a shape of the sixth lens L6. Out of this range, a development towards ultra-thin and wide-angle lenses would make it difficult to correct the problem like an off-axis aberration. Preferably, −1.24≤(R11+R12)/(R11−R12)≤0.23.

A thickness on-axis of the sixth lens L6 is defined as d11. The camera optical lens 10 further satisfies a condition of 0.05≤d11/TTL≤0.15. This facilitates achieving ultra-thin lenses. Preferably, 0.08≤d11/TTL≤0.12.

In this embodiment, an image side surface of the seventh lens L7 is concave in the paraxial region and the seventh lens L7 has a negative refractive power.

The focal length of the camera optical lens 10 is f, and a focal length of the seventh lens L7 is f7. The camera optical lens 10 further satisfies a condition of −1.65≤f7/f≤−0.42. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, −1.03≤f7/f≤−0.53.

An on-axis thickness of the seventh lens L7 is defined as d13. The camera optical lens 10 further satisfies a condition of 0.03≤d13/TTL≤0.09. This facilitates achieving ultra-thin lenses. Preferably, 0.05≤d13/TTL≤0.07.

In this embodiment, the total optical length TTL of the camera optical lens 10 is smaller than or equal to 4.71 mm, which is beneficial for achieving ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is smaller than or equal to 4.50 mm.

In this embodiment, an F number of the camera optical lens 10 is smaller than or equal to 1.81. A large F number leads to a better imaging performance. Preferably, the F number of the camera optical lens 10 is smaller than or equal to 1.78.

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

In the following, examples will be used to describe the camera optical lens 10 of the present disclosure. 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: Optical length (a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis) in mm.

Preferably, inflexion points and/or arrest points can be arranged on the object side surface and/or image side surface of the lens, so as to satisfy the demand for the high quality imaging. The description below can be referred to for specific implementations.

The design information of the camera optical lens 10 in Embodiment 1 of the present disclosure is shown in Tables 1 and 2.

TABLE 1

R
d
nd
vd

S1
∞
d0 =
−0.396

R1
1.390
d1 =
0.616
nd1
1.5439
v1
55.90

R2
2.206
d2 =
0.040

R3
1.805
d3 =
0.225
nd2
1.6607
v2
20.36

R4
2.024
d4 =
0.305

R5
22.569
d5 =
0.298
nd3
1.5439
v3
55.90

R6
443.550
d6 =
0.151

R7
12.009
d7 =
0.270
nd4
1.7002
v4
26.43

R8
54.589
d8 =
0.151

R9
−1.451
d9 =
0.260
nd5
1.7002
v5
22.96

R10
−1.899
d10 =
0.040

R11
2.725
d11 =
0.420
nd6
1.5439
v6
55.90

R12
−3.863
d12 =
0.280

R13
−15.617
d13 =
0.262
nd7
1.5348
v7
55.71

R14
1.412
d14 =
0.420

R15
∞
d15 =
0.210
ndg
1.5168
vg
64.17

R16
∞
d16 =
0.337

In the table, meanings of 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 the object side surface of the seventh lens L7;

R14: curvature radius of the image side surface of the seventh lens L7;

R15: curvature radius of an object side surface of the optical filter GF;

R16: 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 seventh lens L7;

d13: on-axis thickness of the seventh lens L7;

d14: on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;

d15: on-axis thickness of the optical filter GF;

d16: on-axis distance from the image side surface of the optical filter GF to the image plane;

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;

nd7: refractive index of d line of the seventh lens L7;

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;

v7: abbe number of the seventh lens L7;

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 disclosure.

TABLE 2

Conic

coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
−1.9400E−01
1.1853E−02
−5.3087E−02
2.4004E−01
−5.2949E−01
6.2685E−01
−3.8896E−01
8.5395E−02

R2
3.3566E+00
−6.4586E−01
7.9485E−01
−1.9552E−01
−1.0558E+00
1.3039E+00
−5.1789E−01
9.6976E−04

R3
−1.1811E+00
−5.6835E−01
2.4314E−01
2.3632E+00
−6.3839E+00
7.6783E+00
−4.5447E+00
1.0910E+00

R4
3.8882E+00
−1.6904E−01
−3.3589E−01
2.2023E+00
−4.8885E+00
5.3484E+00
−2.8668E+00
6.0682E−01

R5
−2.5502E+01
−4.5597E−02
−2.1608E−01
1.1604E+00
−4.8515E+00
1.0232E+01
−1.1482E+01
5.3650E+00

R6
−9.9000E+01
−1.2977E−01
3.7882E−02
1.8025E−01
−9.7659E−01
1.1737E+00
−8.0228E−01
3.6666E−01

R7
−4.9623E+01
−3.8341E−01
3.6072E−01
−1.3025E+00
3.7589E+00
−5.7181E+00
4.4508E+00
−1.3918E+00

R8
9.9000E+01
−3.8646E−01
−6.6475E−02
2.9111E−01
3.3436E−01
−5.8527E−01
2.6479E−01
−3.8525E−02

R9
−5.4811E+00
−1.6975E−01
4.0897E−01
−3.3002E−01
1.5623E−01
−7.6386E−02
3.6077E−02
−7.5623E−03

R10
−2.1552E+00
−2.1601E−01
1.0989E+00
−1.7548E+00
1.4592E+00
−6.7479E−01
1.6453E−01
−1.6524E−02

R11
−6.3912E+01
1.8413E−01
−2.4296E−01
−1.1694E−02
1.6278E−01
−1.3134E−01
4.4813E−02
−5.5844E−03

R12
−9.9000E+01
3.0394E−01
−4.2536E−01
2.5684E−01
−9.3967E−02
2.0182E−02
−2.2258E−03
9.5463E−05

R13
2.3215E+01
−1.7670E−01
5.2289E−03
5.6366E−02
−2.6661E−02
5.5555E−03
−5.6533E−04
2.2760E−05

R14
−1.1338E+01
−1.6080E−01
5.8578E−02
−6.7405E−03
−2.4368E−03
8.7417E−04
−9.5342E−05
3.2664E−06

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14 and 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 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 disclosure. R1 and R2 represent the object side surface and the image side surface of the first lens L1, R3 and R4 represent the object side surface and the image side surface of the second lens L2, R5 and R6 represent the object side surface and the image side surface of the third lens L3, R7 and R8 represent the object side surface and the image side surface of the fourth lens L4, R9 and R10 represent the object side surface and the image side surface of the fifth lens L5, R11 and R12 represent the object side surface and the image side surface of the sixth lens L6, and R13 and R14 represent the object side surface and the image side surface of the seventh lens L7. The data in the column named “inflexion point position” refers to vertical distances from 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” refers to vertical distances from arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

TABLE 3

Number
Inflexion
Inflexion
Inflexion
Inflexion
Inflexion
Inflexion

of
point
point
point
point
point
point

inflexion
position
position
position
position
position
position

points
1
2
3
4
5
6

R1
1
0.945
0
0
0

R2
1
0.305
0
0
0

R3
2
0.335
0.565
0
0

R4
0
0
0
0
0

R5
2
0.245
0.825
0
0

R6
2
0.045
0.905
0
0

R7
1
0.145
0
0
0

R8
4
0.065
0.785
1.155
1.215

R9
2
0.645
1.285
0
0

R10
6
0.585
0.845
1.015
1.305
1.385
1.415

R11
3
0.615
1.415
1.605

R12
3
0.235
0.695
1.665

R13
2
1.205
2.135

R14
3
0.415
1.995
2.305

TABLE 4

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

R1
0
0

R2
1
0.785

R3
0
0

R4
0
0

R5
1
0.395

R6
1
0.065

R7
1
0.235

R8
1
0.105

R9
0
0

R10
0
0

R11
1
0.925

R12
2
0.475
0.855

R13
1
1.965

R14
1
0.875

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 430 nm, 470 nm, 510 nm, 555 nm, 610 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 555 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 is 2.044 mm. The image height of 1.0 H is 2.934 mm. The FOV (field of view) is 77.50°. 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 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 5

R
d
nd
vd

S1
∞
d0 =
−0.381

R1
1.425
d1 =
0.600
nd1
1.5439
v1
55.90

R2
1.759
d2 =
0.040

R3
1.323
d3 =
0.225
nd2
1.6700
v2
19.39

R4
1.645
d4 =
0.304

R.5
−21.767
d5 =
0.273
nd3
1.5439
v3
55.90

R6
−12.058
d6 =
0.041

R7
8.060
d7 =
0.270
nd4
1.7379
v4
30.35

R8
39.316
d8 =
0.173

R9
−1.807
d9 =
0.260
nd5
1.7896
v5
22.01

R10
−2.045
d10 =
0.237

R11
4.782
d11 =
0.422
nd6
1.5439
v6
55.90

R12
−3.247
d12 =
0.189

R13
7.006
d13 =
0.263
nd7
1.5348
v7
55.71

R14
1.030
d14 =
0.421

R15
∞
d13 =
0.210
ndg
1.5168
vg
64.17

R16
∞
d14 =
0.357

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

TABLE 6

Conic

coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
−3.5642E−01
2.2115E−02
−1.1057E−01
4.7763E−01
−9.8364E−01
1.0798E+00
−6.1060E−01
1.2840E−01

R2
1.8208E+00
−1.0899E+00
2.3488E+00
−3.7078E+00
4.0382E+00
−3.3734E+00
1.9622E+00
−5.8931E−01

R3
−2.6727E+00
−8.1500E−01
8.8269E−01
1.8971E+00
−7.3645E+00
1.0183E+01
−6.7195E+00
1.7854E+00

R4
1.8366E+00
−1.8038E−01
−1.0428E+00
5.9706E+00
−1.5662E+01
2.2831E+01
−1.8197E+01
6.2128E+00

R5
−9.9000E+01
6.7750E−02
−4.6329E−01
1.9756E+00
−7.4773E+00
1.5518E+01
−1.7703E+01
8.3756E+00

R6
−9.9000E+01
−3.3970E−01
1.8577E+00
−7.1246E+00
1.6390E+01
−2.1959E+01
1.4811E+01
−3.7360E+00

R7
3.9250E+01
−6.1590E−01
2.5245E+00
−9.5676E+00
2.2407E+01
−2.9587E+01
2.0307E+01
−5.6717E+00

R8
9.9000E+01
−4.1618E−01
1.3704E+00
−4.0277E+00
6.2707E+00
−5.0566E+00
2.0606E+00
−3.3924E−01

R9
−3.4418E+00
−2.1261E−01
1.4373E+00
−3.9606E+00
5.1065E+00
−3.2932E+00
1.0434E+00
−1.3040E−01

R10
5.2442E−02
−4.0356E−02
4.4710E−01
−9.5250E−01
1.0130E+00
−5.3758E−01
1.3798E−01
−1.3724E−02

R11
−5.2099E+01
1.9686E−01
−4.3119E−01
3.2272E−01
−1.6138E−01
4.2582E−02
−1.5934E−03
−8.2160E−04

R12
−9.6135E+01
2.6017E−01
−4.2463E−01
2.5204E−01
−7.7320E−02
1.2681E−02
−1.0530E−03
3.7045E−05

R13
−1.1806E+01
−4.5309E−01
3.0652E−01
−1.0223E−01
1.9355E−02
−2.0089E−03
9.5020E−05
−9.4866E−07

R14
−8.7855E+00
−2.5584E−01
1.7553E−01
−6.4825E−02
1.1869E−02
−9.3066E−04
9.9163E−06
1.3933E−06

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 disclosure.

TABLE 7

Number of
Inflexion
Inflexion
Inflexion

inflexion
point
point
point

points
position 1
position 2
position 3

R1
1
0.955
0
0

R2
1
0.265
0
0

R3
2
0.325
0.595
0

R4
0
0
0
0

R5
0
0
0
0

R6
1
0.885
0
0

R7
1
0.155
0
0

R8
2
0.075
0.835
0

R9
2
0.835
1.175
0

R10
2
0.865
1.285
0

R11
3
0.565
1.365
1.565

R12
2
0.265
0.595
0

R13
3
0.175
1.125
2.165

R14
3
0.375
1.975
2.285

TABLE 8

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

R1
0
0
0

R2
1
0.775
0

R3
0
0
0

R4
0
0
0

R5
0
0
0

R6
0
0
0

R7
1
0.275
0

R8
1
0.125
0

R9
2
1.145
1.205

R10
2
1.225
1.335

R11
1
0.835
0

R12
0
0
0

R13
2
0.295
1.995

R14
1
0.905
0

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 430 nm, 470 nm, 510 nm, 555 nm, 588 nm and 650 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 555 nm after passing the camera optical lens 20 according to Embodiment 2.

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

In this embodiment, the entrance pupil diameter of the camera optical lens is 2.040 mm. The image height of 1.0 H is 2.934 mm. The FOV (field of view) is 77.50°. 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.

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

TABLE 9

R
d
nd
vd

S1
∞
d0 =
−0.393

R1
1.386
d1 =
0.614
nd1
1.5439
v1
55.90

R2
2.197
d2 =
0.040

R3
1.776
d3 =
0.225
nd2
1.6607
v2
20.36

R4
2.008
d4 =
0.305

R5
49.115
d5 =
0.291
nd3
1.5439
v3
55.90

R6
−213.356
d6 =
0.125

R7
9.648
d7 =
0.270
nd4
1.7139
v4
27.16

R8
107.974
d8 =
0.123

R9
−1.226
d9 =
0.260
nd5
1.7002
v5
22.96

R10
−1.523
d10 =
0.083

R11
2.248
d11 =
0.424
nd6
1.5439
v6
55.90

R12
−651.260
d12 =
0.330

R13
−11.996
d13 =
0.262
nd7
1.5348
v7
55.71

R14
1.845
d14 =
0.400

R15
∞
d13 =
0.210
ndg
1.5168
vg
64.17

R16
∞
d14 =
0.323

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

TABLE 10

Conic

coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
−1.8974E−01
1.0913E−02
−5.8211E−02
2.7189E−01
−6.2364E−01
7.6274E−01
−4.9056E−01
1.1524E−01

R2
3.1839E+00
−6.2605E−01
6.7539E−01
2.1449E−01
−1.9557E+00
2.5032E+00
−1.3856E+00
2.6568E−01

R3
−2.0785E+00
−5.1906E−01
1.4163E−01
2.5219E+00
−6.5036E+00
7.6964E+00
−4.5099E+00
1.0778E+00

R4
3.7145E+00
−1.4620E−01
−3.9429E−01
2.2922E+00
−4.9650E+00
5.3951E+00
−2.8878E+00
6.0839E−01

R5
−9.9000E+01
−2.3075E−02
−3.0102E−01
1.3670E+00
−5.1738E+00
1.0358E+01
−1.1315E+01
5.1759E+00

R6
9.9000E+01
−1.6826E−01
1.7248E−01
−2.9163E−01
1.3055E−01
−6.1783E−03
−4.4768E−01
4.5790E−01

R7
−2.6304E+01
−5.0709E−01
9.1881E−01
−3.4949E+00
9.3463E+00
−1.3190E+01
9.3099E+00
−2.6224E+00

R8
9.9000E+01
−4.9210E−01
6.0406E−01
−9.8880E−01
1.5652E+00
−1.2692E+00
4.8093E−01
−6.8887E−02

R9
−7.8630E+00
−2.4719E−01
1.3188E+00
−2.6361E+00
2.7207E+00
−1.5203E+00
4.3940E−01
−5.1761E−02

R10
−4.0896E+00
−5.0741E−03
6.5829E−01
−1.3489E+00
1.2340E+00
−5.8938E−01
1.4368E−01
−1.4181E−02

R11
−3.1009E+01
1.4645E−01
−3.2722E−01
2.6079E−01
−1.4795E−01
5.1607E−02
−9.1309E−03
6.1818E−04

R12
9.9000E+01
1.1432E−01
−1.9265E−01
9.5598E−02
−2.3134E−02
2.3858E−03
−5.5552E−06
−9.8502E−06

R13
1.2654E+01
−3.0621E−01
1.7403E−01
−3.6959E−02
1.1180E−03
8.8795E−04
−1.4680E−04
7.1380E−06

R14
−1.3646E+01
−2.0622E−01
1.1940E−01
−3.7985E−02
5.8747E−03
−3.6060E−04
2.6982E−06
2.2936E−08

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

TABLE 11

Number of
Inflexion point
Inflexion point
Inflexion point
Inflexion point

inflexion points
position 1
position 2
position 3
position 4

R1
1
0.935
0
0
0

R2
1
0.305
0
0
0

R3
2
0.345
0.555
0
0

R4
0
0
0
0
0

R5
1
0.205
0
0
0

R6
1
0.905
0
0
0

R7
1
0.145
0
0
0

R8
2
0.045
0.795
0
0

R9
4
0.545
0.715
0.825
1.335

R10
4
0.515
0.745
1.015
1.365

R11
2
0.575
1.515
0
0

R12
2
0.035
0.575
0
0

R13
1
1.145
0
0
0

R14
2
0.385
2.005
0
0

TABLE 12

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

R1
0
0
0

R2
1
0.775
0

R3
0
0
0

R4
0
0
0

R5
1
0.315
0

R6
0
0
0

R7
1
0.235
0

R8
1
0.065
0

R9
2
1.315
1.335

R10
0
0
0

R11
1
0.925
0

R12
2
0.055
0.765

R13
1
1.985
0

R14
1
0.785
0

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 430 nm, 470 nm, 510 nm, 555 nm, 610 nm and 650 nm after passing the camera optical lens 30 according to Embodiment 3. FIG. 12 illustrates field curvature and distortion of light with a wavelength of 555 nm after passing the camera optical lens 30 according to Embodiment 3.

Table 13 in the following lists values corresponding to the respective conditions in this embodiment in order to satisfy the above conditions. The camera optical lens according to this embodiment satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 2.043 mm. The image height of 1.0 H is 2.934 mm. The FOV (field of view) is 77.50°. 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
Embodiment
Embodiment
Embodiment

conditions
1
2
3

f
3.597
3.590
3.595

f1
5.438
8.42
5.432

f2
17.76
7.786
16.626

f3
43.565
49.055
73.192

f4
21.782
13.607
14.726

f5
−11.474
−37.872
−14.012

f6
2.995
3.611
4.107

f7
−2.402
−2.288
−2.962

f12
4.182
4.273
4.121

FNO
1.76
1.76
1.76

f1/f
1.51
2.35
1.51

f3/f4
2.00
3.61
4.97

(R13 + R14)/(R13 − R14)
0.83
1.34
0.73

It can be appreciated by one having ordinary skill in the art that the description above is only embodiments of the present disclosure. In practice, one having ordinary skill in the art can make various modifications to these embodiments in forms and details without departing from the spirit and scope of the present disclosure.

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, a sixth lens and a seventh lens, wherein the camera optical lens satisfies following conditions:1.51≤f1/f≤2.50;1.70≤n4≤2.20;2.00≤f3/f4≤5.00;−10.00≤(R13+R14)/(R13−R14)≤10.00; and1.70≤n5≤2.20,wheref denotes a focal length of the camera optical lens;f1 denotes a focal length of the first lens;f3 denotes a focal length of the third lens;f4 denotes a focal length of the fourth lens;n4 denotes a refractive index of the fourth lens;n5 denotes a refractive index of the fifth lens;R13 denotes a curvature radius of an object side surface of the seventh lens; andR14 denotes a curvature radius of an image side surface of the seventh lens.
2. The camera optical lens as described in claim 1, wherein the first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of glass material, the fifth lens is made of glass material, the sixth lens is made of plastic material and the seventh lens made of a plastic material.
3. The camera optical lens as described in claim 1, further satisfying following conditions: 1.51≤f1/f≤2.42;1.70≤n4≤1.97;2.00≤f3/f4≤4.99;−4.63≤(R13+R14)/(R13−R14)≤5.67; and1.70≤n5≤2.00.
4. The camera optical lens as described in claim 1, wherein the first lens has a positive refractive power, and comprises an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region, and the camera optical lens further satisfies following conditions:−19.09≤(R1+R2)/(R1−R2)≤−2.94; and0.07≤d1/TTL≤0.22,whereR1 denotes a curvature radius of the object side surface of the first lens;R2 denotes a curvature radius of the image side surface of the first lens;d1 denotes an on-axis thickness of the first lens; andTTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
5. The camera optical lens as described in claim 4, further satisfying following conditions: −11.93≤(R1+R2)/(R1−R2)≤−3.67; and0.11≤d1/TTL≤b 0.17.
6. The camera optical lens as described in claim 1, wherein the second lens has a positive refractive power, and comprises an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region, and the camera optical lens further satisfies following conditions:1.08≤f2/f≤7.41;−35.01≤(R3+R4)/(R3−R4)≤−6.14; and0.03≤d3/TTL≤0.08,wheref2 denotes a focal length of the second lens;R3 denotes a curvature radius of the object side surface of the second lens;R4 denotes a curvature radius of the image side surface of the second lens;d3 denotes an on-axis thickness of the second lens; andTTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
7. The camera optical lens as described in claim 6, further satisfying following conditions: 1.74≤f2/f≤5.92;−21.88≤(R3+R4)/(R3−R4)≤−7.67; and0.04≤d3/TTL≤0.06.
8. The camera optical lens as described in claim 1, wherein the third lens has a positive refractive power, and the camera optical lens further satisfies following conditions:6.06≤f3/f≤30.54;−2.21≤(R5+R6)/(R5−R6)≤5.23; and0.03≤d5/TTL≤0.10,whereR5 denotes a curvature radius of an object side surface of the third lens;R6 denotes a curvature radius of an image side surface of the third lens;d5 denotes an on-axis thickness of the fifth lens; andTTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
9. The camera optical lens as described in claim 8, further satisfying following conditions: 9.69≤f3/f≤24.43;−1.38≤(R5+R6)/(R5−R6)≤4.18; and0.05≤d5/TTL≤0.08.
10. The camera optical lens as described in claim 1, wherein the fourth lens has a positive refractive power, and comprises an object side surface being convex in a paraxial region and an image side surface being concave in the paraxial region, and the camera optical lens further satisfies following conditions:1.90≤f4/f≤9.08;−3.13≤(R7+R8)/(R7−R8)≤−0.80; and0.03≤d7/TTL≤0.09,whereR7 denotes a curvature radius of the object side surface of the fourth lens;R8 denotes a curvature radius of the image side surface of the fourth lens;d7 denotes an on-axis thickness of the fourth lens; andTTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
11. The camera optical lens as described in claim 10, further satisfying following conditions: 3.03≤f4/f≤7.27;−1.96≤(R7+R8)/(R7−R8)≤−1.00; and0.05≤d7/TTL≤0.08.
12. The camera optical lens as described in claim 1, wherein the fifth lens has a negative refractive power, and comprises an object side surface being concave in a paraxial region and an image side surface being convex in the paraxial region, and the camera optical lens further satisfies following conditions:−21.10≤f5/f≤−2.13;−32.40≤(R9+R10)/(R9−R10)≤−4.99; and0.03≤d9/TTL≤0.09,wheref5 denotes a focal length of the fifth lens;R9 denotes a curvature radius of the object side surface of the fifth lens;R10 denotes a curvature radius of the image side surface of the fifth lens;d9 denotes an on-axis thickness of the fifth lens; andTTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
13. The camera optical lens as described in claim 12, further satisfying following conditions: −13.19≤f5/f≤−2.66;−20.25≤(R9+R10)/(R9−R10)≤−6.23; and0.05≤d9/TTL≤0.07.
14. The camera optical lens as described in claim 1, wherein the sixth lens has a positive refractive power, and comprises an object side surface being convex in a paraxial region and an image side surface being convex in the paraxial region, and the camera optical lens further satisfies following conditions:0.42≤f6/f≤1.71;−1.99≤(R11+R12)/(R11−R12)≤0.29; and0.05≤d11/TTL≤0.15,wheref6 denotes a focal length of the sixth lens;R11 denotes a curvature radius of the object side surface of the sixth lens;R12 denotes a curvature radius of the image side surface of the sixth lens;d11 denotes an on-axis thickness of the sixth lens; andTTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
15. The camera optical lens as described in claim 14, further satisfying following conditions: 0.67≤f6/f≤1.37;−1.24≤(R11+R12)/(R11−R12)≤0.23; and0.08≤d11/TTL≤0.12.
16. The camera optical lens as described in claim 1, wherein the seventh lens has a negative refractive power, and the image side surface of the seventh lens is concave in a paraxial region, and the camera optical lens further satisfies following conditions:−1.65≤f7/f≤−0.42; and0.03≤d13/TTL≤0.09,wheref7 denotes a focal length of the seventh lens;d13 denotes an on-axis thickness of the seventh lens; andTTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
17. The camera optical lens as described in claim 16, further satisfying following conditions: −1.03≤f7/f≤−0.53; and0.05≤d13/TTL≤0.07.
18. The camera optical lens as described in claim 1, wherein a total optical length TTL from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is smaller than or equal to 4.71 mm.
19. The camera optical lens as described in claim 18, wherein the total optical length TTL of the camera optical lens is smaller than or equal to 4.5 mm.
20. The camera optical lens as described in claim 1, wherein an F number of the camera optical lens is smaller than or equal to 1.81.

Priority Claims (2)

Number	Date	Country	Kind
201811614653.3	Dec 2018	CN	national
201811614660.3	Dec 2018	CN	national

CAMERA OPTICAL LENS

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Publication Number

Date Filed

Date Published

Inventors

Original Assignees

CPC

International Classifications

Abstract

Description

Claims

Priority Claims (2)