CAMERA OPTICAL LENS

Description

TECHNICAL FIELD

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

BACKGROUND

With the emergence of smart phones in recent years, the demand for miniature camera optical lens is increasingly higher, but in general the photosensitive devices of camera optical lens are nothing more than Charge Coupled Devices (CCDs) or Complementary Metal-Oxide Semiconductor Sensors (CMOS sensors). 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 optical lenses with good imaging quality 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 becoming increasingly higher, a five-piece or six-piece or seven-piece lens structure gradually emerges in lens designs. There is a demand for an ultra-thin, wide-angle camera lens having excellent optical features and having sufficiently corrected aberrations.

SUMMARY

In view of the problems, the present invention aims to provide a camera optical lens, which can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

In an embodiment, the present invention provides a camera optical lens. The camera optical lens sequentially includes, from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens; a fifth lens; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. The camera optical lens satisfies following conditions: 2.80≤v1/v2≤4.50; and −10.00≤f3/f≤−3.00, where f denotes a focal length of the camera optical lens; f3 denotes a focal length of the third lens; v1 denotes an abbe number of the first lens; and v2 denotes an abbe number of the second lens.

The present invention has advantageous effects in that the camera optical lens according to the present invention has excellent optical characteristics and is ultra-thin, wide-angle and has a large aperture, making it especially suitable for high-pixel camera optical lens assembly of mobile phones and WEB camera optical lenses formed by camera elements such as CCD and CMOS.

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 invention. 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 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.

DESCRIPTION OF EMBODIMENTS

The present invention 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 invention more apparent, the present invention 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 invention, not intended to limit the invention.

Embodiment 1

Referring to FIG. 1, 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 10 includes 7 lenses. Specifically, the camera optical lens 10 sequentially 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 a glass filter (GF) can be arranged between the seventh lens L7 and an image plane Si.

The first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a negative refractive power, the sixth lens L6 has a positive refractive power, and the seventh lens L7 has a negative refractive power.

The first lens L1 is made of a glass 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 plastic material, the fifth lens L5 is made of a plastic material, the sixth lens L6 is made of a plastic material, and the seventh lens L7 is made of a plastic material.

An abbe number of the first lens L1 is defined as v1, and an abbe number of the second lens L2 is defined as v2. The camera optical lens 10 should satisfy a condition of 2.80≤v1/v2≤4.50, which specifies a ratio of the abbe number of the first lens L1 to the abbe number of the second lens L2. This can facilitate correction of aberrations with development towards ultra-thin lenses. As an example, 2.84≤v1/v2≤4.35.

A focal length of the 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 10 should satisfy a condition of −10.00≤f3/f≤−3.00, which specifies a ratio of the focal length f3 of the third lens L3 to the focal length of the camera optical lens 10. The appropriate distribution of the refractive power leads to better imaging quality and a lower sensitivity. As an example, −9.98≤f3/f≤−3.03.

A curvature radius of an object side surface of the fifth lens L5 is defined as R9, and a curvature radius of an image side surface of the fifth lens L5 is defined as R10. The camera optical lens 10 should satisfy a condition of (R9+R10)/(R9−R10)≥5.00, which specifies a shape of the fifth lens L5. When the condition is satisfied, the deflection of light passing through the lens can be alleviated, and aberrations can be effectively reduced.

A focal length of the seventh lens L7 is defined as f7. The camera optical lens 10 should satisfy a condition of −1.00≤f7/f≤−0.50, which specifies a ratio of the focal length f7 of the seventh lens L7 to the focal length of the camera optical lens 10. The appropriate distribution of the refractive power leads to better imaging quality and a lower sensitivity.

The 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 0.52≤f1/f≤1.66, which specifies a ratio of the positive refractive power of the first lens L1 to the focal length of the camera optical lens. When the condition is satisfied, the first lens can have an appropriate positive refractive power, thereby facilitating reducing aberrations of the system while facilitating development towards ultra-thin, wide-angle lenses. As an example, 0.84≤f1/f≤1.33.

A curvature radius of an object side surface of the first lens L1 is defined as R1, and a curvature radius of an image side surface of the first lens L1 is defined as R2. The camera optical lens 10 should satisfy a condition of −4.08≤(R1+R2)/(R1−R2)≤−1.28. This can reasonably control a shape of the first lens L1, so that the first lens L1 can effectively correct spherical aberrations of the system. As an example, −2.55≤(R1+R2)/(R1−R2)≤−1.60.

An on-axis thickness of the first lens L1 is defined as d1, and a total optical length from the 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. The camera optical lens 10 should satisfy a condition of 0.08≤d1/TTL≤0.24. This can facilitate achieving ultra-thin lenses. As an example, 0.13≤d1/TTL≤0.20.

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 −14.13≤f2/f≤−4.10. By controlling the negative refractive power of the second lens L2 within the reasonable range, correction of aberrations of the optical system can be facilitated. As an example, −8.83≤f2/f≤−5.13.

A curvature radius of an object side surface of the second lens L2 is defined as R3, and a curvature radius of an image side surface of the second lens L2 is defined as R4. The camera optical lens 10 should satisfy a condition of 3.40≤(R3+R4)/(R3−R4)≤15.14, which specifies a shape of the second lens L2. This can facilitate correction of an on-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 5.45≤(R3+R4)/(R3−R4)≤12.11.

An on-axis thickness of the second lens L2 is defined as d3, and the total optical length from the 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. The camera optical lens 10 should satisfy a condition of 0.02≤d3/TTL≤0.06. This can facilitate achieving ultra-thin lenses. As an example, 0.03≤d3/TTL≤0.04.

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 should satisfy a condition of 0.66≤(R5+R6)/(R5−R6)≤10.29, which specifies a shape of the third lens L3. When the condition is satisfied, the deflection of light passing through the lens can be alleviated, and aberrations can be effectively reduced. As an example, 1.05≤(R5+R6)/(R5−R6)≤8.23.

An on-axis thickness of the third lens L3 is defined as d5, and the total optical length from the 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. The camera optical lens 10 should satisfy a condition of 0.02≤d5/TTL≤0.06. This can facilitate achieving ultra-thin lenses. As an example, 0.03≤d5/TTL≤0.05.

The focal length of the camera optical lens 10 is f, and the focal length of the fourth lens L4 is f4. The camera optical lens 10 further satisfies a condition of −218.89≤f4/f≤24.99, which specifies a ratio of the focal length f4 of the fourth lens L4 to the focal length f of the system. This can facilitate improving the performance of the optical system. As an example, −136.81≤f4/f≤19.99.

A curvature radius of an object side surface of the fourth lens L4 is defined as R7, and a curvature radius of an image side surface of the fourth lens L4 is defined as R8. The camera optical lens 10 should satisfy a condition of −4.67≤(R7+R8)/(R7−R8)≤0.39, which specifies a shape of the fourth lens L4. This can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, −2.92≤(R7+R8)/(R7−R8)≤0.31.

An on-axis thickness of the fourth lens L4 is defined as d7, and the total optical length from the 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. The camera optical lens 10 should satisfy a condition of 0.04≤d7/TTL≤0.14. This can facilitate achieving ultra-thin lenses. As an example, 0.07≤d7/TTL≤0.11.

The focal length of the camera optical lens 10 is f, and the focal length of the fifth lens L5 is f5. The camera optical lens 10 further satisfies a condition of −10.13≤f5/f≤2493.58. This condition can effectively make a light angle of the camera optical lens 10 gentle and reduce the tolerance sensitivity. As an example, −6.33≤f5/f≤1994.87.

An on-axis thickness of the fifth lens L5 is defined as d9, the total optical length from the 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. The camera optical lens 10 should satisfy a condition of 0.02≤d9/TTL≤0.09. This can facilitate achieving ultra-thin lenses. As an example, 0.04≤d9/TTL≤0.07.

The focal length of the camera optical lens 10 is f, and the focal length of the sixth lens L6 is f6. The camera optical lens 10 further satisfies a condition of 0.33≤f6/f≤1.92. The appropriate distribution of the refractive power leads to better imaging quality and a lower sensitivity. As an example, 0.53≤f6/f≤1.54.

A curvature radius of an object side surface of the sixth lens L6 is defined as R11, and a curvature radius of an image side surface of the sixth lens L6 is defined as R12. The camera optical lens 10 should satisfy a condition of −4.89≤(R11+R12)/(R11−R12)≤0.21, which specifies a shape of the sixth lens L6. This can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, −3.06≤(R11+R12)/(R11−R12)≤0.17.

An on-axis thickness of the sixth lens L6 is defined as d11, and the total optical length from the 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. The camera optical lens 10 should satisfy a condition of 0.04≤d11/TTL≤0.15. This can facilitate achieving ultra-thin lenses. As an example, 0.06≤d11/TTL≤0.12.

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 0.03≤(R13+R14)/(R13−R14)≤0.83, which specifies a shape of the seventh lens L7. This can facilitate correction of an off-axis aberration with development towards ultra-thin, wide-angle lenses. As an example, 0.05≤(R13+R14)/(R13−R14)≤0.67.

An on-axis thickness of the seventh lens L7 is defined as d13, and the total optical length from the 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. The camera optical lens 10 should satisfy a condition of 0.03≤d13/TTL≤0.11. This can facilitate achieving ultra-thin lenses. As an example, 0.04≤d13/TTL≤0.09.

In this embodiment, an image height of the camera optical lens 10 is defined as IH. The camera optical lens 10 should satisfy a condition of TTL/IH≤1.35, thereby achieving ultra-thin lenses.

In this embodiment, an F number (Fno) of the camera optical lens 10 is smaller than or equal to 1.59. The camera optical lens 10 has a large aperture and better imaging performance.

In this embodiment, a FOV (field of view) of the camera optical lens 10 is greater than or equal to 82°, thereby achieving wide-angle lenses.

When the above conditions are satisfied, the camera optical lens 10 will have high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures. With these characteristics, the camera optical lens 10 is especially suitable for high-pixel camera optical lens assembly of mobile phones and WEB camera optical lenses formed by imaging elements such as CCD and CMOS.

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: Optical length (the total optical length from the object side surface of the first lens L1 to the image plane of the camera optical lens along the optic axis) in mm.

In an example, 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.

Table 1 and Table 2 show design data of the camera optical lens 10 according to Embodiment 1 of the present invention.

TABLE 1

R
d
nd
vd

S1
∞
d0=
−0.727

R1
2.125
d1=
1.009
nd1
1.5264
v1
76.86

R2
6.215
d2=
0.145

R3
7.570
d3=
0.230
nd2
1.6700
v2
19.39

R4
5.631
d4=
0.347

R5
9.770
d5=
0.230
nd3
1.6700
v3
19.39

R6
7.215
d6=
0.157

R7
28.530
d7=
0.539
nd4
1.5444
v4
55.82

R8
71.198
d8=
0.318

R9
3.979
d9=
0.324
nd5
1.5661
v5
37.71

R10
3.865
d10=
0.333

R11
2.947
d11=
0.480
nd6
1.5444
v6
55.82

R12
−69.270
d12=
0.650

R13
−5.982
d13=
0.447
nd7
1.5346
v7
55.70

R14
2.937
d14=
0.264

R15
∞
d15=
0.210
ndg
1.5168
vg
64.17

R16
∞
d16=
0.503

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 aspheric surface data of respective lens in the camera optical lens 10 according to Embodiment 1 of the present invention.

TABLE 2

Conic coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
−5.4148E−01
4.9360E−03
4.7352E−03
−4.4778E−03
3.3761E−03
−1.4645E−03
3.5209E−04
−4.2760E−05

R2
−1.4498E+01
−1.7585E−02
9.0178E−03
−5.1421E−03
4.0990E−03
−2.8460E−03
1.0310E−03
−1.4456E−04

R3
9.4848E+00
−4.6129E−02
2.8219E−02
5.0574E−03
−1.4828E−02
9.8385E−03
−3.0926E−03
4.5338E−04

R4
1.4345E+01
−3.8643E−02
2.7284E−02
−1.5023E−03
−7.1743E−03
3.4115E−03
−6.1883E−04
4.0870E−05

R5
−9.0427E+01
−4.7646E−02
1.6333E−02
−3.5968E−02
4.4180E−02
−3.5448E−02
1.4468E−02
−2.1815E−03

R6
−2.6401E+01
−5.1809E−02
3.5728E−02
−6.2935E−02
7.2273E−02
−4.9672E−02
1.7778E−02
−2.3397E−03

R7
9.8835E+01
−4.3203E−02
3.0733E−02
−5.5966E−02
5.9921E−02
−3.6798E−02
1.1258E−02
−1.2604E−03

R8
9.9000E+01
−6.1379E−02
3.7865E−02
−4.2048E−02
2.6824E−02
−1.0133E−02
1.9712E−03
−1.4943E−04

R9
−7.8047E+00
−1.1259E−01
9.7596E−02
−6.8693E−02
2.7471E−02
−6.4497E−03
7.6665E−04
−3.1635E−05

R10
−7.6416E+00
−1.5006E−01
9.5724E−02
−4.7374E−02
1.3722E−02
−2.0986E−03
1.5313E−04
−3.9087E−06

R11
−4.4994E+00
−1.9730E−02
−1.9904E−02
1.1572E−02
−4.5351E−03
9.0873E−04
−8.4098E−05
2.9100E−06

R12
−4.5828E+01
4.7071E−02
−4.9437E−02
2.1369E−02
−5.9390E−03
9.7491E−04
−8.3553E−05
2.8581E−06

R13
−3.9521E−01
−1.3254E−01
4.5683E−02
−7.1497E−03
6.2945E−04
−3.1725E−05
8.4897E−07
−9.3006E−09

R14
−1.3792E+01
−7.9124E−02
2.8272E−02
−6.2786E−03
8.5841E−04
−7.1140E−05
3.2379E−06
−6.1227E−08

In Table 2, 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+A10x^m+A12x¹²+A14x¹⁴+A16x¹⁶ (1)

In the present embodiment, 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 polynomial 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, respectively; P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, respectively; P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, respectively; P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, respectively; P5R1 and P5R2 represent the object side surface and the image side surface of the fifth lens L5, respectively; P6R1 and P6R2 represent the object side surface and the image side surface of the sixth lens L6, respectively; and P7R1 and P7R2 represent the object side surface and the image side surface of the seventh lens L7, respectively. The data in the column “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 “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 of
Inflexion point
Inflexion point
Inflexion point

inflexion points
position 1
position 2
position 3

P1R1
1
1.615

P1R2
1
1.105

P2R1
0

P2R2
0

P3R1
1
0.405

P3R2
2
0.495
1.225

P4R1
2
0.285
1.365

P4R2
1
0.145

P5R1
1
0.525

P5R2
3
0.415
1.785
2.125

P6R1
2
0.765
2.235

P6R2
2
0.175
0.755

P7R1
1
1.585

P7R2
2
0.525
3.235

TABLE 4

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
1
0.685

P3R2
2
0.855
1.355

P4R1
1
0.495

P4R2
1
0.245

P5R1
1
1.005

P5R2
1
0.805

P6R1
1
1.285

P6R2
2
0.295
0.995

P7R1
1
3.165

P7R2
1
1.085

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 436 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 below further lists 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 respective conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 3.297 mm. The image height of 1.0H is 4.636 mm. The FOV (field of view) along a diagonal direction is 80.00°. Thus, the camera optical lens can provide an ultra-thin, wide-angle lens while having on-axis and off-axis aberrations sufficiently corrected, thereby leading to better optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1. 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 invention.

TABLE 5

R
d
nd
νd

S1
∞
d0=
−0.739

R1
2.103
d1=
0.982
nd1
1.4970
ν1
81.61

R2
6.682
d2=
0.140

R3
4.898
d3=
0.230
nd2
1.6700
ν2
19.39

R4
4.015
d4=
0.372

R5
11.578
d5=
0.235
nd3
1.6700
ν3
19.39

R6
8.632
d6=
0.182

R7
−843.139
d7=
0.550
nd4
1.5444
ν4
55.82

R8
493.509
d8=
0.269

R9
3.513
d9=
0.290
nd5
1.5661
ν5
37.71

R10
3.512
d10=
0.328

R11
2.244
d11=
0.525
nd6
1.5444
ν6
55.82

R12
5.348
d12=
0.813

R13
−5.976
d13=
0.356
nd7
1.5346
ν7
55.69

R14
5.339
d14=
0.264

R15
∞
d15=
0.210
ndg
1.5168
νg
64.17

R16
∞
d16=
0.452

Table 6 shows aspheric surface data of respective lenses in the camera optical lens 20 according to Embodiment 2 of the present invention.

TABLE 6

Conic coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
−5.0111E−01
2.7664E−03
7.2731E−03
−6.3559E−03
3.7645E−03
−1.2620E−03
2.3899E−04
−2.5118E−05

R2
−9.2708E+00
−2.4092E−02
1.4163E−02
−6.1590E−03
2.1152E−03
−6.8461E−04
1.5346E−04
−1.5288E−05

R3
8.5473E+00
−5.3370E−02
2.0269E−02
3.0810E−03
−7.9474E−03
4.1793E−03
−1.0449E−03
1.2099E−04

R4
6.4485E+00
−3.5958E−02
4.5032E−03
2.2704E−02
−3.0087E−02
1.8525E−02
−6.1214E−03
8.1292E−04

R5
−7.7140E+01
−3.9762E−02
9.7612E−03
−3.1588E−02
3.4404E−02
−2.4400E−02
9.7335E−03
−1.5038E−03

R6
−1.6468E+01
−4.7023E−02
4.0578E−02
−7.7567E−02
7.9921E−02
−5.0090E−02
1.7232E−02
−2.2370E−03

R7
9.9000E+01
−4.3282E−02
4.0536E−02
−5.9095E−02
5.1360E−02
−2.9957E−02
9.4723E−03
−1.1060E−03

R8
−9.8616E+01
−6.6546E−02
2.7253E−02
−2.2635E−02
1.2086E−02
−4.4634E−03
9.1762E−04
−7.4525E−05

R9
−6.3228E+00
−8.8297E−02
6.7234E−02
−4.5927E−02
1.6957E−02
−3.7564E−03
4.3112E−04
−1.7005E−05

R10
−6.0543E+00
−1.3548E−01
9.5728E−02
−5.0138E−02
1.4689E−02
−2.2771E−03
1.7399E−04
−5.0552E−06

R11
−3.5083E+00
−6.0201E−02
1.2812E−02
−2.8781E−03
−8.7733E−04
4.2400E−04
−5.4202E−05
2.2806E−06

R12
−8.1699E+01
2.6696E−02
−3.4807E−02
1.4339E−02
−3.8737E−03
6.2391E−04
−5.2180E−05
1.7272E−06

R13
2.4409E−01
−1.3423E−01
4.4670E−02
−6.7406E−03
5.6928E−04
−2.7203E−05
6.7379E−07
−6.4230E−09

R14
−1.5138E+01
−8.7472E−02
2.9095E−02
−6.2714E−03
8.8206E−04
−7.7404E−05
3.7417E−06
−7.4484E−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 point

inflexion points
position 1
position 2
position 3

P1R1
0

P1R2
1
1.205

P2R1
0

P2R2
0

P3R1
1
0.405

P3R2
2
0.495
1.225

P4R1
1
1.355

P4R2
1
0.055

P5R1
1
0.625

P5R2
3
0.475
1.835
2.155

P6R1
2
0.745
2.225

P6R2
1
0.765

P7R1
1
1.625

P7R2
2
0.435
3.175

TABLE 8

Number of
Arrest point
Arrest point

arrest points
position 1
position 2

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
1
0.685

P3R2
2
0.835
1.355

P4R1
0

P4R2
1
0.085

P5R1
1
1.115

P5R2
1
0.975

P6R1
1
1.315

P6R2
1
1.265

P7R1
1
3.205

P7R2
1
0.795

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 436 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 respective conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 3.296 mm. The image height of 1.0H is 4.636 mm. The FOV (field of view) along a diagonal direction is 80.00°. Thus, the camera optical lens can provide an ultra-thin, wide-angle lens while having on-axis and off-axis aberrations sufficiently corrected, thereby leading to better optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1. 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 invention.

TABLE 9

R
d
nd
νd

S1
∞
d0=
−0.708

R1
2.13
d1=
0.997
nd1
1.5357
ν1
74.64

R2
6.532
d2=
0.132

R3
5.539
d3=
0.23
nd2
1.6153
ν2
25.94

R4
4.263
d4=
0.396

R5
68.231
d5=
0.23
nd3
1.6700
ν3
19.39

R6
9.306
d6=
0.082

R7
9.154
d7=
0.582
nd4
1.5444
ν4
55.82

R8
−38.26
d8=
0.475

R9
6.914
d9=
0.357
nd5
1.5661
ν5
37.71

R10
4.647
d10=
0.241

R11
4.302
d11=
0.616
nd6
1.5444
ν6
55.82

R12
−3.232
d12=
0.415

R13
−6.429
d13=
0.32
nd7
1.5346
ν7
55.69

R14
1.842
d14=
0.264

R15
∞
d15=
0.21
ndg
1.5168
νg
64.17

R16
∞
d16=
0.655

Table 10 shows aspheric surface data of respective lenses in the camera optical lens 30 according to Embodiment 3 of the present invention.

TABLE 10

Conic coefficient
Aspherical surface coefficients

k
A4
A6
A8
A10
A12
A14
A16

R1
−3.8111E−01
4.4980E−03
1.9764E−03
−8.2360E−04
7.8480E−04
−4.2257E−04
1.4906E−04
−2.7774E−05

R2
2.2558E+00
−3.5027E−02
2.0526E−02
−1.2714E−02
8.4478E−03
−4.5774E−03
1.3794E−03
−1.6617E−04

R3
−2.6281E+01
−4.3483E−02
2.0403E−02
2.3798E−02
−3.4210E−02
2.0440E−02
−6.2097E−03
8.4183E−04

R4
7.8556E+00
−4.8126E−02
1.5410E−02
2.5219E−02
−3.8555E−02
2.3224E−02
−7.2259E−03
8.8428E−04

R5
9.8770E+01
−6.3745E−02
6.3073E−02
−1.0598E−01
1.1035E−01
−7.1636E−02
2.4554E−02
−3.2761E−03

R6
−6.4616E+01
−1.0959E−01
1.6224E−01
−2.3267E−01
2.1773E−01
−1.2319E−01
3.7420E−02
−4.4574E−03

R7
−3.1876E+01
−1.0540E−01
1.3017E−01
−1.6672E−01
1.4087E−01
−7.1687E−02
1.9213E−02
−1.9936E−03

R8
0.0000E+00
−6.1770E−02
4.5737E−02
−5.1757E−02
3.4250E−02
−1.3150E−02
2.5592E−03
−1.9317E−04

R9
−3.5255E+01
−1.3132E−01
1.1029E−01
−8.0872E−02
3.3879E−02
−8.1066E−03
9.5293E−04
−3.8613E−05

R10
−1.1580E+01
−1.7259E−01
9.4970E−02
−4.5862E−02
1.3655E−02
−2.0804E−03
1.3981E−04
−2.5305E−06

R11
−3.0199E+00
−1.3047E−02
−2.5079E−02
1.0253E−02
−3.2603E−03
6.4263E−04
−6.2027E−05
2.2705E−06

R12
−1.8276E+01
7.6991E−02
−6.0992E−02
1.9678E−02
−4.2763E−03
6.3130E−04
−5.3011E−05
1.8275E−06

R13
1.5022E−02
−1.3554E−01
4.5571E−02
−6.9735E−03
6.0596E−04
−3.0722E−05
8.5122E−07
−1.0034E−08

R14
−1.0837E+01
−8.4092E−02
2.9394E−02
−5.8713E−03
7.0357E−04
−5.1980E−05
2.1759E−06
−3.8803E−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 invention.

TABLE 11

Number of
Inflexion point
Inflexion point
Inflexion point

inflexion points
position 1
position 2
position 3

P1R1
1
1.645

P1R2
1
1.135

P2R1
0

P2R2
0

P3R1
1
0.145

P3R2
2
0.325
1.225

P4R1
3
0.335
1.355
1.785

P4R2
0

P5R1
1
0.325

P5R2
3
0.335
1.695
2.165

P6R1
2
0.715
2.215

P6R2
2
2.245
2.345

P7R1
1
1.595

P7R2
2
0.535
3.305

TABLE 12

Number of
Arrest point
Arrest point
Arrest point

arrest points
position 1
position 2
position 3

P1R1
0

P1R2
0

P2R1
0

P2R2
0

P3R1
1
0.255

P3R2
2
0.625
1.365

P4R1
3
0.635
1.505
1.865

P4R2
0

P5R1
1
0.605

P5R2
1
0.615

P6R1
1
1.155

P6R2
0

P7R1
1
3.205

P7R2
1
1.225

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 436 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 below further lists various values of the present embodiment and values corresponding to parameters which are specified in the above conditions. Obviously, 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 3.301 mm. The image height of 1.0H is 4.636 mm. The FOV (field of view) along a diagonal direction is 80.00°. Thus, the camera optical lens can provide an ultra-thin, wide-angle lens while having on-axis and off-axis aberrations sufficiently corrected, thereby leading to better optical characteristics.

TABLE 13

Parameters

and Conditions
Embodiment 1
Embodiment 2
Embodiment 3

v1/v2
3.96
4.21
2.88

f3/f
−8.13
−9.96
−3.06

f
5.209
5.207
5.216

f1
5.639
5.751
5.453

f2
−34.140
−36.782
−32.083

f3
−42.327
−51.846
−15.960

f4
86.775
−569.878
13.583

f5
8659.382
207.693
−26.429

f6
5.188
6.682
3.480

f7
−3.609
−5.200
−2.634

f12
6.388
6.427
6.179

Fno
1.58
1.58
1.58

Fno denotes the F number of the camera optical lens.

It can be appreciated by one having ordinary skill in the art that the description above is only embodiments of the present invention. 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 invention.

Claims

1. A camera optical lens, sequentially comprising, from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens; a fifth lens; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power, wherein the camera optical lens satisfies following conditions: 2.80≤v1/v2≤4.50; and−10.00≤f3/f≤−3.00,wheref denotes a focal length of the camera optical lens;f3 denotes a focal length of the third lens;v1 denotes an abbe number of the first lens; andv2 denotes an abbe number of the second lens.
2. The camera optical lens as described in claim 1, further satisfying a following condition: (R9+R10)/(R9−R10)≥5.00,whereR9 denotes a curvature radius of an object side surface of the fifth lens; andR10 denotes a curvature radius of an image side surface of the fifth lens.
3. The camera optical lens as described in claim 1, further satisfying a following condition: −1.00≤f7/f≤−0.50,wheref7 denotes a focal length of the seventh lens.
4. The camera optical lens as described in claim 1, further satisfying following conditions: 0.52≤f1/f≤1.66;−4.08≤(R1+R2)/(R1−R2)≤−1.28; and0.08≤d1/TTL≤0.24,wheref1 denotes a focal length of the first lens;R1 denotes a curvature radius of an object side surface of the first lens;R2 denotes a curvature radius of an 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 1, further satisfying following conditions: −14.13≤f2/f≤−4.10;3.40≤(R3+R4)/(R3−R4)≤15.14; and0.02≤d3/TTL≤0.06,wheref2 denotes a focal length of the second lens;R3 denotes a curvature radius of an object side surface of the second lens;R4 denotes a curvature radius of an 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.
6. The camera optical lens as described in claim 1, further satisfying following conditions: 0.66≤(R5+R6)/(R5−R6)≤10.29; and0.02≤d5/TTL≤0.06,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 third 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 1, further satisfying following conditions: −218.89≤f4/f≤24.99;−4.67≤(R7+R8)/(R7−R8)≤0.39; and0.04≤d7/TTL≤0.14,wheref4 denotes a focal length of the fourth lens;R7 denotes a curvature radius of an object side surface of the fourth lens;R8 denotes a curvature radius of an 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.
8. The camera optical lens as described in claim 1, further satisfying following conditions: −10.13≤f5/f≤2493.58; and0.02≤d9/TTL≤0.09,wheref5 denotes a focal length 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.
9. The camera optical lens as described in claim 1, further satisfying following conditions: 0.33≤f6/f≤1.92;−4.89≤(R11+R12)/(R11−R12)≤0.21; and0.04≤d11/TTL≤0.15,wheref6 denotes a focal length of the sixth lens;R11 denotes a curvature radius of an object side surface of the sixth lens;R12 denotes a curvature radius of an 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.
10. The camera optical lens as described in claim 1, further satisfying following conditions: 0.03≤(R13+R14)/(R13−R14)≤0.83; and0.03≤d13/TTL≤0.11,whereR13 denotes a curvature radius of an object side surface of the seventh lens;R14 denotes a curvature radius of an image side surface 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.

Priority Claims (1)

Number	Date	Country	Kind
201911285724.4	Dec 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)