# US 12,181,638 B2 · Optical imaging lens assembly

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- Number: US 12,181,638 B2
- Document ID: US12181638B2
- Status: Granted
- Kind: B2
- Application number: 17/509,695
- Filed: 2021-10-25
- Published: 2022-02-10
- Granted: 2024-12-31
- Earliest claimed: 2020-10-29
- Assignees: Zhejiang Sunny Optics Co., Ltd.
- Applicants: Zhejiang Sunny Optics Co., Ltd.
- Inventors: Yu Tang; Yu Zhou; Fujian Dai; Liefeng Zhao
- Web page: https://patentgrep.com/patent/US12181638B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 9/64: having more than six components
- 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 13/06: Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces}
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An optical imaging lens assembly is provided. The optical imaging lens assembly comprises, sequentially along an optical axis from an object side to an image side, a first lens having a refractive power; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power, an object-side surface of the fourth lens being a concave surface; a fifth lens having a negative refractive power, an object-side surface of the fifth lens being a convex surface; a sixth lens having a refractive power; a seventh lens having a refractive power; and an eighth lens having a refractive power, wherein a maximal field-of-view FOV of the optical imaging lens assembly and an effective focal length f of the optical imaging lens assembly satisfy: tan(FOV/2)×f>7.68.

## 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 refractive power;
a second lens, having a refractive power;
a third lens, having a refractive power;
a fourth lens, having a refractive power, an object-side surface of the fourth lens being a concave surface;
a fifth lens, having a negative refractive power, an object-side surface of the fifth lens being a convex surface;
a sixth lens, having a refractive power;
a seventh lens, having a refractive power; and
an eighth lens, having a refractive power,
wherein a maximal field-of-view FOV of the optical imaging lens assembly and an effective focal length f of the optical imaging lens assembly satisfy: tan(FOV/2)×f>7.68 mm.

### Claim 2 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximal effective radius DT61 of an object-side surface of the sixth lens and a maximal effective radius DT71 of an object-side surface of the seventh lens satisfy: DT61/DT71≤0.69.

### Claim 3 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an axial distance SAG71 between an intersection point of the object-side surface of the seventh lens and the optical axis and a vertex of an effective radius of the object-side surface of the seventh lens and an axial distance SAG72 between an intersection point of an image-side surface of the seventh lens and the optical axis and a vertex of an effective radius of the image-side surface of the seventh lens satisfy: 1<SAG72/SAG71<1.9.

### Claim 4 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a radius of curvature R7 of the object-side surface of the fourth lens, a radius of curvature R8 of an image-side surface of the fourth lens and an effective focal length f4 of the fourth lens satisfy: 0<|(R7+R8)/f4|<1.4.

### Claim 5 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein the effective focal length f of the optical imaging lens assembly and an effective focal length f2 of the second lens satisfy: −0.6<f/f2<−0.2.

### Claim 6 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein the effective focal length f of the optical imaging lens assembly, an effective focal length f5 of the fifth lens and an effective focal length f6 of the sixth lens satisfy: −2<f/(f5+f6)<−0.1.

### Claim 7 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an air spacing T56 on the optical axis between the fifth lens and the sixth lens and an air spacing T67 on the optical axis between the sixth lens and the seventh lens satisfy: 0.3<T56/T67<0.8.

### Claim 8 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a center thickness CT7 of the seventh lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: 0.2<CT8/CT7≤0.93.

### Claim 9 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a radius of curvature R13 of the object-side surface of the seventh lens and a radius of curvature R14 of the image-side surface of the seventh lens satisfy: 0.2<(R14−R13)/(R14+R13)<0.8.

### Claim 10 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a radius of curvature R15 of an object-side surface of the eighth lens and an effective focal length f8 of the eighth lens satisfy: 0.3<R15/f8<0.9.

### Claim 11 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a distance TTL on the optical axis from an object-side surface of the first lens to an image plane and half of a diagonal length ImgH of an effective pixel area on the image plane satisfy: TTL/ImgH<1.11.

### Claim 12

An optical imaging lens assembly, comprising, sequentially along an optical axis from an object side to an image side:
a first lens, having a refractive power;
a second lens, having a refractive power;
a third lens, having a refractive power;
a fourth lens, having a refractive power, an object-side surface of the fourth lens being a concave surface;
a fifth lens, having a negative refractive power, an object-side surface of the fifth lens being a convex surface;
a sixth lens, having a refractive power;
a seventh lens, having a refractive power; and
an eighth lens, having a refractive power, wherein a distance TTL on the optical axis from an object-side surface of the first lens to an image plane and half of a diagonal length ImgH of an effective pixel area on the image plane satisfy: TTL/ImgH<1.11.

### Claim 13 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein a maximal effective radius DT61 of an object-side surface of the sixth lens and a maximal effective radius DT71 of an object-side surface of the seventh lens satisfy: DT61/DT71≤0.69.

### Claim 14 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein an axial distance SAG71 between an intersection point of the object-side surface of the seventh lens and the optical axis and a vertex of an effective radius of the object-side surface of the seventh lens and an axial distance SAG72 between an intersection point of an image-side surface of the seventh lens and the optical axis and a vertex of an effective radius of the image-side surface of the seventh lens satisfy: 1<SAG72/SAG71<1.9.

### Claim 15 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein a radius of curvature R7 of the object-side surface of the fourth lens, a radius of curvature R8 of an image-side surface of the fourth lens and an effective focal length f4 of the fourth lens satisfy: 0<|(R7+R8)/f4|<1.4.

### Claim 16 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein an effective focal length f of the optical imaging lens assembly and an effective focal length f2 of the second lens satisfy: −0.6<f/f2<−0.2.

### Claim 17 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein the effective focal length f of the optical imaging lens assembly, an effective focal length f5 of the fifth lens and an effective focal length f6 of the sixth lens satisfy: −2<f/(f5+f6)<−0.1.

### Claim 18 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein an air spacing T56 on the optical axis between the fifth lens and the sixth lens and an air spacing T67 on the optical axis between the sixth lens and the seventh lens satisfy: 0.3<T56/T67<0.8.

### Claim 19 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein a center thickness CT7 of the seventh lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: 0.2<CT8/CT7≤0.93.

### Claim 20 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein a radius of curvature R13 of the object-side surface of the seventh lens and a radius of curvature R14 of the image-side surface of the seventh lens satisfy: 0.2<(R14−R13)/(R14+R13)<0.8.