# US 12,216,248 B2 · Optical imaging lens assembly

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- Number: US 12,216,248 B2
- Document ID: US12216248B2
- Status: Granted
- Kind: B2
- Application number: 17/689,387
- Filed: 2022-03-08
- Published: 2022-10-20
- Granted: 2025-02-04
- Earliest claimed: 2021-04-13
- Assignees: Zhejiang Sunny Optics Co., Ltd.
- Applicants: Zhejiang Sunny Optics Co., Ltd
- Inventors: Tingting Gong; Litong Song; Fujian Dai; Liefeng Zhao
- Web page: https://patentgrep.com/patent/US12216248B2

## CPC

- G02B 13/0035: {having three lenses}
- G02B 9/12: having three components only
- G02B 13/06: Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An optical imaging lens assembly includes, sequentially along an optical axis from an object side to an image side: a first lens, having a negative refractive power, an image-side surface of the first lens being a concave surface; a second lens, having a positive refractive power, an object-side surface of the second lens being a convex surface; and a third lens, having a refractive power, an object-side surface of the third lens being a convex surface. A Half of a diagonal length ImgH of an effective pixel area on an image plane of the optical imaging lens assembly, an effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: 3 mm<ImgH×f/EPD<4 mm. A maximal field-of-view FOV of the optical imaging lens assembly and the effective focal length f of the optical imaging lens assembly satisfy: 1 mm<tan(FOV/2)×f<2 mm.

## Claims

### Claim 1

An optical imaging lens assembly, comprising, sequentially along an optical axis from an object side to an image side:
a first lens, having a negative refractive power, an image-side surface of the first lens being a concave surface;
a second lens, having a positive refractive power, an object-side surface of the second lens being a convex surface; and
a third lens, having a refractive power, an object-side surface of the third lens being a convex surface,
wherein the optical imaging lens assembly satisfies:
3 mm<ImgH×f/EPD<4 mm; and
1 mm<tan(FOV/2)×f<2 mm,
wherein ImgH is a half of a diagonal length of an effective pixel area on an image plane of the optical imaging lens assembly, f is an effective focal length of the optical imaging lens assembly, EPD is an entrance pupil diameter of the optical imaging lens assembly, and FOV is a maximal field-of-view of the optical imaging lens assembly.

### Claim 2 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein the half of the diagonal length ImgH of the effective pixel area on the image plane of the optical imaging lens assembly and the effective focal length f of the optical imaging lens assembly satisfy:
1.5<ImgH/f<2.

### Claim 3 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximal distortion DISTmax of the optical imaging lens assembly satisfies:
|DISTmax|<6%.

### Claim 4 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens assembly satisfy:
−1.3<f1/f<−0.8.

### Claim 5 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective focal length f1 of the first lens, an effective focal length f3 of the third lens and an effective focal length f2 of the second lens satisfy:
0<(f1+f3)/f2<0.5.

### Claim 6 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a radius of curvature R3 of the object-side surface of the second lens and a radius of curvature R6 of an image-side surface of the third lens satisfy:
−1.5<R3/R6<−1.

### Claim 7 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis and a center thickness CT2 of the second lens on the optical axis satisfy:
0.3<CT1/CT2<1.

### Claim 8 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy:
0.3<CT1/CT3<0.7.

### Claim 9 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximal effective radius DT11 of an object-side surface of the first lens and a maximal effective radius DT32 of an image-side surface of the third lens satisfy:
2<DT11/DT32<2.5.

### Claim 10 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis and a maximal effective radius DT11 of an object-side surface of the first lens satisfy:
0.2<CT1/DT11<0.5.

### Claim 11 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximal effective radius DT21 of the object-side surface of the second lens and a maximal effective radius DT32 of an image-side surface of the third lens satisfy:
0.9<DT21/DT32<1.3.

### Claim 12 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximal effective radius DT12 of the image-side surface of the first lens and a maximal effective radius DT31 of the object-side surface of the third lens satisfy:
1.3<DT12/DT31<2.

### Claim 13 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximal effective radius DT12 of the image-side surface of the first lens and a maximal effective radius DT21 of the object-side surface of the second lens satisfy:
1<DT12/DT21<1.2.

### Claim 14 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis and an axial distance SAG12 from an intersection point of the image-side surface of the first lens and the optical axis to a vertex of an effective radius of the image-side surface of the first lens satisfy:
0.5<CT1/SAG12<1.

### Claim 15 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximal effective radius DT11 of an object-side surface of the first lens and the half of the diagonal length ImgH of the effective pixel area on the image plane of the optical imaging lens assembly satisfy:
1<DT11/ImgH<1.3.

### Claim 16 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an axial distance SAG21 from an intersection point of the object-side surface of the second lens and the optical axis to a vertex of an effective radius of the object-side surface of the second lens and a center thickness CT2 of the second lens on the optical axis satisfy:
0.2<SAG21/CT2<1.

### Claim 17 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a distance TTL from an object-side surface of the first lens to the image plane of the optical imaging lens assembly along the optical axis and the half of the diagonal length ImgH of the effective pixel area on the image plane of the optical imaging lens assembly satisfy:
2<TTL/ImgH<3.

### Claim 18

An optical imaging lens assembly, comprising, sequentially along an optical axis from an object side to an image side:
a first lens, having a negative refractive power, an image-side surface of the first lens being a concave surface;
a second lens, having a positive refractive power, an object-side surface of the second lens being a convex surface; and
a third lens, having a refractive power, an object-side surface of the third lens being a convex surface,
wherein the optical imaging lens assembly satisfies:
3 mm<ImgH×f/EPD<4 mm; and
1.5<ImgH/f<2,
wherein ImgH is a half of a diagonal length of an effective pixel area on an image plane of the optical imaging lens assembly, f is an effective focal length of the optical imaging lens assembly, and EPD is an entrance pupil diameter of the optical imaging lens assembly.

### Claim 19 (depends on 18)

The optical imaging lens assembly according to claim 18, wherein a maximal distortion DISTmax of the optical imaging lens assembly satisfies:
|DISTmax|<6%.

### Claim 20 (depends on 19)

The optical imaging lens assembly according to claim 19, wherein a maximal field-of-view FOV of the optical imaging lens assembly and the effective focal length f of the optical imaging lens assembly satisfy:
1 mm<tan(FOV/2)×f<2 mm.