# US 12,222,471 B2 · Camera optical lens

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- Number: US 12,222,471 B2
- Document ID: US12222471B2
- Status: Granted
- Kind: B2
- Application number: 17/562,044
- Filed: 2021-12-27
- Published: 2023-03-23
- Granted: 2025-02-11
- Earliest claimed: 2021-09-23
- Assignees: AAC Optics (Suzhou) Co., Ltd.
- Applicants: AAC Optics (Suzhou) Co., Ltd.
- Inventors: Zhanli Guo
- Web page: https://patentgrep.com/patent/US12222471B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 13/0065: {having a beam-folding prism or mirror}
- G02B 9/60: having five components only
- G02B 13/02: Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present invention discloses 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 negative refractive power, a fourth lens having a positive refractive power, and a fifth lens having a refractive power. The camera optical lens satisfies the following conditions: 8.00≤f, 0.90≤f/TTL, 0.40≤f1/f≤0.85, −1.10≤f3/f4≤−0.40, and 0.30≤d2/d4≤2.00. The camera optical lens has large aperture, long focal length and small distortion.

## Claims

### Claim 1

A camera optical lens, comprising, 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 negative refractive power, a fourth lens having a positive refractive power, and a fifth lens having a refractive power; wherein the camera optical lens satisfies the following conditions:
8.00≤f;
0.90≤f/TTL;
0.40≤f1/f≤0.85;
−1.10≤f3/f4≤−0.40;
0.30≤d2/d4≤2.00; and
9.00≤R6/R5≤30.00;
where,
f: a focal length of the camera optical lens;
f1: a focal length of the first lens;
f3: a focal length of the third lens;
f4: a focal length of the fourth lens;
TTL: 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;
d2: an on-axis distance from an image side surface of the first lens to an object side surface of the second lens;
d4: an on-axis distance from an image side surface of the second lens to an object side surface of the third lens;
R5: a central curvature radius of the object side surface of the third lens; and
R6: a central curvature radius of an image side surface of the third lens.

### Claim 2 (depends on 1)

The camera optical lens according to claim 1, wherein, the first lens has an object side surface being convex in a paraxial region and the image side surface of the first lens is convex in the paraxial region; the camera optical lens further satisfies the following conditions:
−1.72≤(R1+R2)/(R1−R2)≤−0.48; and
0.07≤d1/TTL≤0.25;
where,
R1: a central curvature radius of the object side surface of the first lens;
R2: a central curvature radius of the image side surface of the first lens;
d1: an on-axis thickness of the first lens; and
TTL: 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.

### Claim 3 (depends on 1)

The camera optical lens according to claim 1, wherein, the object side surface of the second lens is convex in a paraxial region and the image side surface of the second lens is concave in the paraxial region; the camera optical lens further satisfies the following conditions:
−1.34≤f2/f≤−0.40;
1.17≤(R3+R4)/(R3−R4)≤3.84; and
0.01≤d3/TTL≤0.05;
where,
f2: a focal length of the second lens;
R3: a central curvature radius of the object side surface of the second lens;
R4: a central curvature radius of the image side surface of the second lens;
d3: an on-axis thickness of the second lens; and
TTL: 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.

### Claim 4 (depends on 1)

The camera optical lens according to claim 1, wherein, the object side surface of the third lens is concave in a paraxial region, and the third lens has an image side surface being convex in the paraxial region; the camera optical lens further satisfies the following conditions:
−5.58≤f3/f≤−1.33; and
0.02≤d5/TTL≤0.07;
where,
d5: an on-axis thickness of the third lens.

### Claim 5 (depends on 1)

The camera optical lens according to claim 1, wherein, the fourth lens has an object side surface being concave in a paraxial region, and an image side surface being convex in the paraxial region; the camera optical lens further satisfies the following conditions:
1.27≤f4/f≤7.43;
4.43≤(R7+R8)/(R7−R8)≤48.10; and
0.05≤d7/TTL≤0.16;
where,
R7: a central curvature radius of the object side surface of the fourth lens;
R8: a central curvature radius of the image side surface of the fourth lens;
d7: an on-axis thickness of the fourth lens; and
TTL: 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.

### Claim 6 (depends on 1)

The camera optical lens according to claim 1, wherein, the fifth lens has an object side surface being concave in a paraxial region, an image side surface being convex in the paraxial region;
the camera optical lens further satisfies the following conditions:
−5.60≤f5/f≤−0.79;
−4.43≤(R9+R10)/(R9−R10)≤−0.72; and
0.03≤d9/TTL≤0.16;
where,
f5: a focal length of the fifth lens;
R9: a central curvature radius of the object side surface of the fifth lens;
R10: a central curvature radius of the image side surface of the fifth lens;
d9: an on-axis thickness of the fifth lens; and
TTL: 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.

### Claim 7 (depends on 1)

The camera optical lens according to claim 1 further satisfying the following condition:
f/IH≥4.00;
where,
IH: an image height of the camera optical lens.

### Claim 8 (depends on 1)

The camera optical lens according to claim 1, wherein, the camera optical lens further comprise a reflecting surface arranged at an end of the first lens away from the second lens; the reflecting surface is configured for reflecting and deflecting an entry light.

### Claim 9 (depends on 8)

The camera optical lens according to claim 8, wherein, the reflecting surface is formed by a prism.