# US 12,181,637 B2 · Optical imaging lens assembly

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- Number: US 12,181,637 B2
- Document ID: US12181637B2
- Status: Granted
- Kind: B2
- Application number: 17/505,669
- Filed: 2021-10-20
- Published: 2022-05-12
- Granted: 2024-12-31
- Earliest claimed: 2020-11-06
- Assignees: Zhejiang Sunny Optics Co., Ltd.
- Applicants: Zhejiang Sunny Optics Co., Ltd.
- Inventors: Yu Zhou; Yu Tang; Fujian Dai; Liefeng Zhao
- Web page: https://patentgrep.com/patent/US12181637B2

## CPC

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

## Abstract

The disclosure discloses an optical imaging lens assembly, which sequentially includes, from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens with refractive power respectively. There is an air space between any two adjacent lenses. The third lens has positive refractive power. An object-side surface of the fourth lens is a concave surface, while an image-side surface is a concave surface. ImgH is a half of a diagonal length of an effective pixel region on an imaging surface, T89 is a spacing distance of the eighth lens and the ninth lens on the optical axis, ImgH and T89 meet 6.0<ImgH/T89<7.0.

## 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, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens with refractive power respectively, wherein there is an air space between any two adjacent lenses;
the first lens has positive refractive power;
the second lens has negative refractive power;
the third lens has positive refractive power;
the fourth lens has negative refractive power, an object-side surface of the fourth lens is a concave surface, while an image-side surface of the fourth lens is a concave surface;
the fifth lens has positive refractive power;
the eighth lens has positive refractive power;
the ninth lens has negative refractive power; and
ImgH is a half of a diagonal length of an effective pixel region on an imaging surface, T89 is a spacing distance of the eighth lens and the ninth lens on the optical axis, ImgH and T89 meet 6.0<ImgH/T89<7.0;
f is a total effective focal length of the optical imaging lens assembly, f8 is an effective focal length of the eighth lens, f9 is an effective focal length of the ninth lens, f and f8 and f9 meet:
1.0<f/(f8+f9)<1.5;
TTL is an on-axis distance from an object-side surface of the first lens to the imaging surface, Fno is an f-number of the optical imaging lens assembly, TTL and Fno meet:
4.5 mm<TTL/Fno<5.0 mm;
CT1 is a center thickness of the first lens on the optical axis, CT8 is a center thickness of the eighth lens on the optical axis, CT1 and CT8 meet:
1.0<CT8/CT1<1.5.

### Claim 2 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein f2 is an effective focal length of the second lens, f3 is an effective focal length of the third lens, f2 and f3 meet:
−3.0<f3/f2<−2.0.

### Claim 3 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein f1 is an effective focal length of the first lens, f5 is an effective focal length of the fifth lens, f1 and f5 meet:
3.5<f5/f1<7.0.

### Claim 4 (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, CT9 is a center thickness of the ninth lens on the optical axis, Semi-FOV and CT9 meet:
1.0<Tan(Semi-FOV)/CT9<1.5.

### Claim 5 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein T12 is a spacing distance of the first lens and the second lens on the optical axis, T23 is a spacing distance of the second lens and the third lens on the optical axis, T34 is a spacing distance of the third lens and the fourth lens on the optical axis, T12 and T23 and T34 meet:
(T12+T23)<T34.

### Claim 6 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein R1 is a curvature radius of the object-side surface of the first lens, R2 is a curvature radius of an image-side surface of the first lens, N1 is a refractive index of the first lens, R1 and R2 and N1 meet:
R1×N1/R2<0.5.

### Claim 7 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein R4 is a curvature radius of an image-side surface of the second lens, N2 is a refractive index of the second lens, R4 and N2 meet 2.5<R4/N2<3.5.

### Claim 8 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein V2 is an Abbe number of the second lens, R3 is a curvature radius of an object-side surface of the second lens, V2 and R3 meet 2.0<V2/R3<2.5.

### Claim 9 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein f3 is an effective focal length of the third lens, R6 is a curvature radius of an image-side surface of the third lens, f3 and R6 meet 2.5<f3/R6<4.0.

### Claim 10 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein R14 is a curvature radius of an image-side surface of the seventh lens, V7 is an Abbe number of the seventh lens, R14 and V7 meet −2.5<R14/V7<0.

### Claim 11

An optical imaging lens assembly, sequentially comprising, from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens with refractive power respectively, wherein there is an air space between any two adjacent lenses;
the first lens has positive refractive power;
the second lens has negative refractive power;
the third lens has positive refractive power,
the fourth lens has negative refractive power, an object-side surface of the fourth lens is a concave surface, while an image-side surface of the fourth lens is a concave surface;
the fifth lens has positive refractive power;
the eighth lens has positive refractive power;
the ninth lens has negative refractive power; and
f2 is an effective focal length of the second lens, f3 is an effective focal length of the third lens, f2 and f3 meet −3.0<f3/f2<−2.0;
f is a total effective focal length of the optical imaging lens assembly, f8 is an effective focal length of the eighth lens, f9 is an effective focal length of the ninth lens, f and f8 and f9 meet:
1.0<f/(f8+f9)<1.5;
TTL is an on-axis distance from an object-side surface of the first lens to the imaging surface, Fno is an f-number of the optical imaging lens assembly, TTL and Fno meet:
4.5 mm<TTL/Fno<5.0 mm;
CT1 is a center thickness of the first lens on the optical axis, CT8 is a center thickness of the eighth lens on the optical axis, CT1 and CT8 meet:
1.0<CT8/CT1<1.5.

### Claim 12 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein f1 is an effective focal length of the first lens, f5 is an effective focal length of the fifth lens, f1 and f5 meet 3.5<f5/f1<7.0.

### Claim 13 (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 an imaging surface, T89 is a spacing distance of the eighth lens and the ninth lens on the optical axis, ImgH and T89 meet 6.0<ImgH/T89<7.0.

### Claim 14 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein Semi-FOV is a half of a maximum field of view of the optical imaging lens assembly, CT9 is a center thickness of the ninth lens on the optical axis, Semi-FOV and CT9 may meet 1.0<Tan (Semi-FOV)/CT9<1.5.