# US 11,029,495 B2 · Optical imaging lens assembly

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- Number: US 11,029,495 B2
- Document ID: US11029495B2
- Status: Granted
- Kind: B2
- Application number: 16/231,141
- Filed: 2018-12-21
- Published: 2019-04-25
- Granted: 2021-06-08
- Earliest claimed: 2017-08-07
- Assignees: Zhejiang Sunny Optical Co., Ltd
- Applicants: Zhejiang Sunny Optical Co., Ltd.
- Inventors: Kaiyuan Zhang; Ming Li; Yabin Hu
- Web page: https://patentgrep.com/patent/US11029495B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 9/60: having five components only
- 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 13/18: with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly includes, sequentially along an optical axis from an object side to an image side, a first lens to a fifth lens. The first lens has a positive refractive power, and an object-side surface thereof is a convex surface. The second lens has a negative refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a concave surface. The third lens has a positive refractive power or a negative refractive power. The fourth lens has a positive refractive power, and an object-side surface thereof is a concave surface. The fifth lens has a negative refractive power, and an image-side surface thereof is a convex surface. An effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy: −0.9<f1/f2<−0.5.

## 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, a second lens, a third lens, a fourth lens, and a fifth lens,
wherein each of the first lens and the fourth lens has a positive refractive power;
the third lens has a negative refractive power;
at least two of the second lens, the third lens, and the fifth lens have negative refractive powers;
an object-side surface of the first lens and an object-side surface of the second lens are convex surfaces;
an image-side surface of the second lens and an object-side surface of the fourth lens are concave surfaces;
an image-side surface of the fifth lens is a convex surface, and a radius of curvature R10 of the image-side surface of the fifth lens and a total effective focal length f of the optical imaging lens assembly satisfy: −1.0<f/R10<0; and
a spacing distance T23 on the optical axis between the second lens and the third lens and a center thickness CT3 of the third lens on the optical axis satisfy: 1.20≤T23/CT3≤2.43.

### Claim 2 (depends on 1)

The optical imaging lens assembly according to claim 1, further comprising a diaphragm, wherein an axial distance SL from the diaphragm to an image plane of the optical imaging lens assembly and an axial distance TTL from the object-side surface of the first lens to the image plane of the optical imaging lens assembly satisfy: SL/TTL≤0.9.

### Claim 3 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an abbe number V4 of the fourth lens and an abbe number V5 of the fifth lens satisfy: |V4−V5|>20.

### Claim 4 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a combined refractive power of the fourth lens and the fifth lens is a negative refractive power, and a combined focal length f45 of the fourth lens and the fifth lens and the total effective focal length f of the optical imaging lens assembly satisfy: −1.0<f/f45<−0.2.

### Claim 5 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a spacing distance T12 on the optical axis between the first lens and the second lens satisfies: 0.05 mm≤T12≤0.5 mm.

### 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 R4 of the image-side surface of the second lens satisfy: 0<R4/R3≤0.5.

### Claim 7 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein the axial distance TTL from the object-side surface of the first lens to the image plane of the optical imaging lens assembly and the total effective focal length f of the optical imaging lens assembly satisfy: TTL/f<0.95.

### Claim 8

An optical imaging lens assembly comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens,
wherein each of the first lens and the fourth lens has a positive refractive power;
the third lens has a negative refractive power;
at least two of the second lens, the third lens, and the fifth lens have negative refractive powers;
a spacing distance T12 on the optical axis between the first lens and the second lens satisfies: 0.05 mm≤T12≤0.5 mm;
a combined focal length f123 of the first lens, the second lens, and the third lens and a spacing distance T34 on the optical axis between the third lens and the fourth lens satisfy: 3.5<f123/T34<7.0;
a spacing distance T23 on the optical axis between the second lens and the third lens and a center thickness CT3 of the third lens on the optical axis satisfy: 1.20≤T23/CT3≤2.43, and
an axial distance TTL from an object-side surface of the first lens to an image plane of the optical imaging lens assembly and the total effective focal length f of the optical imaging lens assembly satisfy: TTL/f<0.95.

### Claim 9 (depends on 8)

The optical imaging lens assembly according to claim 8, wherein a combined refractive power of the fourth lens and the fifth lens is a negative refractive power, and a combined focal length f45 of the fourth lens and the fifth lens and a total effective focal length f of the optical imaging lens assembly satisfy: −1.0<f/f45<−0.2.

### Claim 10 (depends on 8)

The optical imaging lens assembly according to claim 8, wherein a radius of curvature R3 of the object-side surface of the second lens and a radius of curvature R4 of the image-side surface of the second lens satisfy: 0<R4/R3≤0.5.

### Claim 11 (depends on 8)

The optical imaging lens assembly according to claim 8, further comprising a diaphragm, wherein an axial distance SL from the diaphragm to an image plane of the optical imaging lens assembly and an axial distance TTL from an object-side surface of the first lens to the image plane of the optical imaging lens assembly satisfy: SL/TTL≤0.9.