# US 9,753,252 B2 · Camera lens

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- Number: US 9,753,252 B2
- Document ID: US9753252B2
- Status: Granted
- Kind: B2
- Application number: 15/011,471
- Filed: 2016-01-29
- Published: 2017-03-23
- Granted: 2017-09-05
- Earliest claimed: 2015-09-17
- Assignees: AAC Technologies Pte. Ltd.
- Applicants: Han Tang
- Inventors: Han Tang
- Web page: https://patentgrep.com/patent/US9753252B2

## CPC

- G02B 13/0035: {having three lenses}
- G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A camera lens is disclosed and includes a first lens with positive refractive power, whose object side surface and image side surface are both aspheric surfaces; an aperture; a second lens with positive refractive power, whose object side surface and image side surface are both aspheric surfaces; and a third lens with negative refractive power, whose object side surface and image side surface are both aspheric surfaces. Specific conditions are satisfied.

## Claims

### Claim 1

A camera lens comprising, from the object side to the image side:
a first lens with positive refractive power, whose object side surface and image side surface are both aspheric surfaces;
an aperture;
a second lens with positive refractive power, whose object side surface and image side surface are both aspheric surfaces;
a third lens with negative refractive power, whose object side surface and image side surface are both aspheric surfaces; wherein the object side surface of the first lens is convex and the image side surface is concave, the camera lens satisfies the following conditions:
0.6<f/f1<1.0 (1);
−1.6<(R1+R2)/(R1−R2)<−1.2 (2);
0.15<d1/f<0.2 (3);
−1.5<f/f3<−1 (4);
1.3<(R5+R6)/(R5−R6)<2.1 (5);
1.0<f/f2<2.0 (6);
2.2<(R3+R4)/(R3−R4)<2.8 (7);
where,
f is the focal distance of the camera lens;
f1 is the focal distance of the first lens;
f2 is the focal distance of the second lens;
R1 is the object side curvature radius of the first lens;
R2 is the image side curvature radius of the first lens;
d1 is the center thickness of the first lens;
f3 is the focal distance of the third lens;
R3 is the object side curvature radius of the second lens;
R4 is the image side curvature radius of the second lens;
R5 is the object side curvature radius of the third lens;
R6 is the image side curvature radius of the third lens.

### Claim 2 (depends on 1)

The camera lens according to claim 1 further satisfying the following condition:
0.2<d3/f<0.5 (8);
1.5<d3/d5<3.5 (9);
where,
d3 is the center thickness of the second lens;
d5 is the center thickness of the third lens.

### Claim 3 (depends on 2)

The camera lens according to claim 2, wherein the third lens is made of plastic and has at least one inflexion point.

### Claim 4 (depends on 3)

The camera lens according to claim 3 further satisfying the following condition:
10<d2/d4<20 (10);
2.5<R2/f<4.0 (11);
where
d2 is the axial distance between the image side surface of the first lens and the object side surface of the second lens;
d4 is the axial distance between the image side surface of the second lens and the object side surface of the third lens.

### Claim 5 (depends on 4)

The camera lens according to claim 4 further satisfying the following condition:
1.0<v1/v2<1.2 (12);
where,
v1 is the abbe number of the first lens;
v2 is the abbe number of the second lens.