# US 12,181,633 B2 · Optical imaging lens assembly

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- Number: US 12,181,633 B2
- Document ID: US12181633B2
- Status: Granted
- Kind: B2
- Application number: 17/612,582
- Filed: 2020-04-22
- Published: 2022-07-28
- Granted: 2024-12-31
- Earliest claimed: 2019-05-24
- Assignees: Zhejiang Sunny Optics Co., Ltd.
- Applicants: Zhejiang Sunny Optics Co.,Ltd.
- Inventors: Xiaoting Geng; Xinquan Wang; Fujian Dai; Liefeng Zhao
- Web page: https://patentgrep.com/patent/US12181633B2

## CPC

- G02B 13/004: {having four lenses}
- G02B 9/34: having four components only
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The disclosure provides an optical imaging lens assembly, which sequentially includes, from an object side to an image side along an optical axis: a first lens with a negative refractive power; a second lens with a refractive power, an image-side surface thereof being a convex surface; a third lens with a refractive power, an object-side surface thereof being a convex surface; and a fourth lens with a negative refractive power, an object-side surface thereof being a convex surface while an image-side surface being a concave surface. ImgH is a half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, and a spacing distance T12 of the first lens and the second lens on the optical axis, a spacing distance T23 of the second lens and the third lens on the optical axis and ImgH satisfy: 0.4<(T12+T23)/ImgH<0.6.

## Claims

### Claim 1

An optical imaging lens assembly, sequentially comprising, from an object side to an image side along an optical axis:
a first lens with a negative refractive power;
a second lens with a refractive power, an image-side surface thereof being a convex surface;
a third lens with a refractive power, an object-side surface thereof being a convex surface; and
a fourth lens with a negative refractive power, an object-side surface thereof being a convex surface while an image-side surface being a concave surface, wherein
ImgH is a half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, and a spacing distance T12 of the first lens and the second lens on the optical axis, a spacing distance T23 of the second lens and the third lens on the optical axis and ImgH satisfy: 0.4<(T12+T23)/ImgH<0.6;
an effective focal length f2 of the second lens and a curvature radius R2 of an image-side surface of the first lens satisfy: 0.1<f2/R2<1.8.

### Claim 2 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein the optical imaging lens assembly further comprises a diaphragm, the diaphragm is arranged between the first lens and the second lens.

### Claim 3 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein TTL is a distance from an object-side surface of the first lens to the imaging surface of the optical imaging lens assembly on the optical axis, and a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis and TTL satisfy: 1.4<(CT2+CT3)/TTL×5<1.9.

### Claim 4 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective radius DT22 of the image-side surface of the second lens, an effective radius DT32 of an image-side surface of the third lens and an effective radius DT42 of the image-side surface of the fourth lens satisfy: 1.0<(DT22+DT32)/DT42<1.3.

### Claim 5 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein ImgH is a half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens assembly, and an effective radius DT11 of an object-side surface of the first lens, an effective radius DT12 of an image-side surface of the first lens and ImgH satisfy: 0.8<(DT11+DT12)/ImgH<1.2.

### Claim 6 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein Semi-FOV is a half of a maximum field of view of the optical imaging lens assembly, and Semi-FOV satisfies: 55°≤Semi-FOV≤70°.

### Claim 7 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective focal length f4 of the fourth lens and an effective focal length f1 of the first lens satisfy: 0.1<f4/f1<1.

### Claim 8 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective focal length f2 of the second lens, an effective focal length f3 of the third lens and an effective focal length f of the optical imaging lens assembly satisfy: 2.3<(f2+f3)/f<3.8.

### Claim 9 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a curvature radius R4 of the image-side surface of the second lens and a curvature radius R6 of an image-side surface of the third lens satisfy: 0.2<R4/R6<2.3.

### Claim 10 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens satisfy: 1.5<R7/R8<2.7.

### Claim 11 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an Abbe number V1 of the first lens satisfies: V1>55, and an Abbe number V2 of the second lens satisfies: V2>55.

### Claim 12

An optical imaging lens assembly, sequentially comprising, from an object side to an image side along an optical axis:
a first lens with a negative refractive power;
a second lens with a refractive power, an image-side surface thereof being a convex surface;
a third lens with a refractive power, an object-side surface thereof being a convex surface; and
a fourth lens with a negative refractive power, an object-side surface thereof being a convex surface while an image-side surface being a concave surface, wherein
TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens assembly on the optical axis, and a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis and TTL satisfy: 1.4<(CT2+CT3)/TTL×5<1.9;
an effective focal length f2 of the second lens and a curvature radius R2 of an image-side surface of the first lens satisfy: 0.1<f2/R2<1.8.

### Claim 13 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein the optical imaging lens assembly further comprises a diaphragm, the diaphragm is arranged between the first lens and the second lens.

### Claim 14 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens assembly, and a spacing distance T12 of the first lens and the second lens on the optical axis, a spacing distance T23 of the second lens and the third lens on the optical axis and ImgH satisfy: 0.4<(T12+T23)/ImgH<0.6.

### Claim 15 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein an effective radius DT22 of the image-side surface of the second lens, an effective radius DT32 of an image-side surface of the third lens and an effective radius DT42 of the image-side surface of the fourth lens satisfy: 1.0<(DT22+DT32)/DT42<1.3.

### Claim 16 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens assembly, and an effective radius DT11 of an object-side surface of the first lens, an effective radius DT12 of an image-side surface of the first lens and ImgH satisfy: 0.8<(DT11+DT12)/ImgH<1.2.

### Claim 17 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein Semi-FOV is a half of a maximum field of view of the optical imaging lens assembly, and Semi-FOV satisfies: 55°<Semi-FOV≤70°.

### Claim 18 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein an effective focal length f4 of the fourth lens and an effective focal length f1 of the first lens satisfy: 0.1<f4/f1<1.

### Claim 19 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein an effective focal length f2 of the second lens, an effective focal length f3 of the third lens and an effective focal length f of the optical imaging lens assembly satisfy: 2.3<(f2+f3)/f<3.8.