# US 12,000,983 B2 · Camera optical lens

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- Number: US 12,000,983 B2
- Document ID: US12000983B2
- Status: Granted
- Kind: B2
- Application number: 17/137,440
- Filed: 2020-12-30
- Published: 2022-04-21
- Granted: 2024-06-04
- Earliest claimed: 2020-10-21
- Assignees: Changzhou Raytech Optronics Co., Ltd.
- Applicants: Changzhou Raytech Optronics Co., Ltd.
- Inventors: Wen Sun
- Web page: https://patentgrep.com/patent/US12000983B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 9/64: having more than six components
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present disclosure relates to optical lens, and provides a camera optical lens including from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, a seventh lens having a negative refractive power, and an eighth lens having a negative refractive power; wherein the camera optical lens satisfies the following conditions: 0.95≤f/TTL; −4.00≤f2/f≤−1.80; and 3.00≤(R13+R14)/(R13−R14)≤25.00. The camera optical lens can achieve good optical performance while meeting design requirements for a large aperture, a long focal length and ultra-thinness.

## Claims

### Claim 1

A camera optical lens comprising eight lenses, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, a seventh lens having a negative refractive power, and an eighth lens having a negative refractive power; wherein the first lens includes an image-side surface being concave in the paraxial region, the fourth lens includes an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region; wherein the camera optical lens satisfies the following conditions:
0.95≤f/TTL;
f/IH≥2.25;
−4.00≤f2/f≤−1.80; and
3.00≤(R13+R14)/(R13−R14)≤25.00;
where
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis;
IH denotes an image height of the camera optical lens;
f denotes a focal length of the camera optical lens;
f2 denotes a focal length of the second lens;
R13 denotes a central curvature radius of an object-side surface of the seventh lens; and
R14 denotes a central curvature radius of an image-side surface of the seventh lens.

### Claim 2 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following condition:
4.00≤f4/f≤14.50;
where
f4 denotes a focal length of the fourth lens.

### Claim 3 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following conditions:
0.70≤f1/f≤2.50;
−10.31≤(R1+R2)/(R1−R2)≤−2.82; and
0.04≤d1/TTL≤0.16;
where
f1 denotes a focal length of the first lens;
R1 denotes a central curvature radius of an object-side surface of the first lens;
R2 denotes a central curvature radius of an image-side surface of the first lens; and
d1 denotes an on-axis thickness of the first lens.

### Claim 4 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following conditions:
3.09≤(R3+R4)/(R3−R4)≤19.51; and
0.02≤d3/TTL≤0.05;
where
R3 denotes a central curvature radius of an object-side surface of the second lens;
R4 denotes a central curvature radius of an image-side surface of the second lens; and
d3 denotes an on-axis thickness of the second lens.

### Claim 5 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following conditions:
0.57,13≤f3/f≤1.75;
−3.46≤R5+R6)/(R5−R6)≤−1.07; and
0.05≤d5/TTL≤0.19;
where
f3 denotes a focal length of the third lens;
R5 denotes a central curvature radius of an object-side surface of the third lens;
R6 denotes a central curvature radius of an image-side surface of the third lens; and
d5 denotes an on-axis thickness of the third lens.

### Claim 6 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following conditions:
−472.75≤(R7+R8)/(R7−R8)≤−10.65; and
0.02≤d7/TTL≤0.05;
where
R7 denotes a central curvature radius of an object-side surface of the fourth lens;
R8 denotes a central curvature radius of an image-side surface of the fourth lens; and
d7 denotes an on-axis thickness of the fourth lens.

### Claim 7 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following conditions:
−8.95≤f5/f≤−1.82;
0.44≤(R9+R10)/(R9−R10)≤10.14; and
0.02≤d9/TTL≤0.06;
where
f5 denotes a focal length of the fifth lens;
R9 denotes a central curvature radius of an object-side surface of the fifth lens;
R10 denotes a central curvature radius of an image-side surface of the fifth lens; and
d9 denotes an on-axis thickness of the fifth lens.

### Claim 8 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following conditions:
1.76≤f6/f≤13.06;
1.45≤(R11+R12)/(R11−R12)≤25.66; and
0.03≤d11/TTL≤0.09;
where
f6 denotes a focal length of the sixth lens;
R11 denotes a central curvature radius of an object-side surface of the sixth lens;
R12 denotes a central curvature radius of an image-side surface of the sixth lens; and
d11 denotes an on-axis thickness of the sixth lens.

### Claim 9 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following conditions:
−43.51≤f7/f≤−1.26; and
0.03≤d13/TTL≤0.09;
where
f7 denotes a focal length of the seventh lens; and
d13 denotes an on-axis thickness of the seventh lens.

### Claim 10 (depends on 1)

The camera optical lens according to claim 1, wherein the camera optical lens further satisfies the following conditions:
−4.22≤f8/f≤−0.86;
−2.85≤(R15+R16)/(R15−R16)≤−0.40; and
0.03≤d15/TTL≤0.10;
where
f8 denotes a focal length of the eighth lens;
R15 denotes a central curvature radius of an object-side surface of the eighth lens;
R16 denotes a central curvature radius of an image-side surface of the eighth lens; and
d15 denotes an on-axis thickness of the eighth lens.