# US 10,871,635 B2 · Camera lens

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- Number: US 10,871,635 B2
- Document ID: US10871635B2
- Status: Granted
- Kind: B2
- Application number: 16/236,539
- Filed: 2018-12-30
- Published: 2020-01-23
- Granted: 2020-12-22
- Earliest claimed: 2018-07-20
- Assignees: AAC Optics (Changzhou) Co., Ltd.
- Applicants: AAC Acoustic Technologies (Shenzhen) Co., Ltd.
- Inventors: Hiroyuki Teraoka
- Web page: https://patentgrep.com/patent/US10871635B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 9/64: having more than six components
- G02B 13/04: Reversed telephoto objectives
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present disclosure provides a camera lens, constituted by eight lenses, and featuring excellent optical characteristics, an ultra-thin appearance, a wide angle and a bright Fno. The camera lens is configured with, sequentially from an object side: a 1st lens having a positive refractive power, a 2nd lens having a negative refractive power, a 3rd lens having a negative refractive power, a 4th lens having a positive refractive power, a 5th lens having a negative refractive power, a 6th lens having a positive refractive power, a 7th lens having a positive refractive power and an 8th lens having a negative refractive power, and satisfies specified conditional formulas.

## Claims

### Claim 1

A camera lens, configured with, sequentially from an object side: a 1st lens having a positive refractive power, a 2nd lens having a negative refractive power, a 3rd lens having a negative refractive power, a 4th lens having a positive refractive power, a 5th lens having a negative refractive power, a 6th lens having a positive refractive power, a 7th lens having a positive refractive power and an 8th lens having a negative refractive power, and satisfying conditional formulas (1) to (2) and (4) below:
0.20≤R1/R2≤0.50 (1);
1.00≤R3/R4≤1.40 (2);
−8.00≤f2/f≤−5.00 (4);
where,
f: a focal length of the overall camera lens;
f2: a focal length of the 2nd lens;
R1: a curvature radius of an object side surface of the 1st lens;
R2: a curvature radius of an image side surface of the 1st lens;
R3: a curvature radius of an object side surface of the 2nd lens;
R4: a curvature radius of an image side surface of the 2nd lens.

### Claim 2 (depends on 1)

The camera lens according to claim 1, wherein the camera lens satisfies a conditional formula (3) below:
1.00≤f1/f1.50 (3);
where,
f: a focal length of the overall camera lens;
f1: a focal length of the 1st lens.

### Claim 3 (depends on 1)

The camera lens according to claim 1, wherein the camera lens satisfies a conditional formula (5) below:
−8.00≤f3/f≤−5.00 (5);
where,
f: the focal length of the overall camera lens;
f3: a focal length of the 3rd lens.

### Claim 4 (depends on 1)

The camera lens according to claim 1, wherein the camera lens satisfies a conditional formula (6) below:
−3.00≤R13/R14≤−1.00 (6);
where,
R13: a curvature radius of an object side surface of the 7th lens;
R14: a curvature radius of an image side surface of the 7th lens.

### Claim 5 (depends on 1)

The camera lens according to claim 1, wherein the camera lens satisfies a conditional formula (7) below:
−3.00≤R15/R16≤1.00 (7);
where,
R15: a curvature radius of an object side surface of the 8th lens;
R16: a curvature radius of an image side surface of the 8th lens.