# US 11,112,585 B2 · Optical imaging lens assembly

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- Number: US 11,112,585 B2
- Document ID: US11112585B2
- Status: Granted
- Kind: B2
- Application number: 16/229,231
- Filed: 2018-12-21
- Published: 2019-04-18
- Granted: 2021-09-07
- Earliest claimed: 2017-09-07
- Assignees: Zhejiang Sunny Optical Co., Ltd
- Applicants: Zhejiang Sunny Optical Co., Ltd
- Inventors: Kaiyuan Zhang
- Web page: https://patentgrep.com/patent/US11112585B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 7/021: {for more than one lens}
- G02B 9/62: having six components only
- G02B 13/00: Optical objectives specially designed for the purposes specified below (with variable magnification {in general} G02B15/00)
- G02B 13/18: with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)}
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly includes, sequentially 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, and a sixth lens. The first lens has a positive refractive power and a convex object-side surface. The second lens has a refractive power, a convex object-side surface, and a concave image-side surface. Each of the third lens and the fourth lens has a refractive power. The fifth lens has a positive refractive power, and a convex image-side surface. The sixth lens has a negative refractive power, and a concave object-side surface and a concave image-side surface. A total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.6.

## Claims

### Claim 1

An optical imaging lens assembly comprising, sequentially 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, and a sixth lens,
wherein the first lens has a positive refractive power, and an object-side surface of the first lens is a convex surface;
the second lens has a refractive power, an object-side surface of the second lens is a convex surface, and an image-side surface of the second lens is a concave surface;
each of the third lens and the fourth lens has a refractive power;
the fifth lens has a positive refractive power, and an image-side surface of the fifth lens is a convex surface;
the sixth lens has a negative refractive power, and an object-side surface and an image-side surface of the sixth lens are concave surfaces; and
a total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.6,
wherein a center thickness CT2 of the second lens on the optical axis and a spacing distance T12 between the first lens and the second lens on the optical axis satisfy: 4.30≤CT2/T12≤5.69, and
wherein an effective focal length f1 of the first lens and a center thickness CT1 of the first lens on the optical axis satisfy: 3<f1/CT1<4.

### Claim 2 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an axial distance TTL from the object-side surface of the first lens to an image plane of the optical imaging lens assembly and half of a diagonal length ImgH of an effective pixel area on the image plane of the optical imaging lens assembly satisfy: TTL/ImgH≤1.5.

### Claim 3 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective focal length f1 of the first lens and a center thickness CT1 of the first lens on the optical axis satisfy: 3.65≤f1/CT1≤3.90.

### Claim 4 (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: 1.5<R3/R4<2.5.

### Claim 5 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein the second lens has a negative refractive power, and an effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens assembly satisfy: −2<f2/f<−1.

### Claim 6 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R8 of an image-side surface of the fourth lens satisfy: −1<(R7−R8)/(R7+R8)<2.

### Claim 7 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein the total effective focal length f of the optical imaging lens assembly and a radius of curvature R10 of the image-side surface of the fifth lens satisfy: —3<f/R10<−2.5.

### Claim 8 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein an effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens assembly satisfy: 0.5<f5/f<1.

### Claim 9 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a radius of curvature R11 of the object-side surface of the sixth lens and a radius of curvature R12 of the image-side surface of the sixth lens satisfy: −2<R11/R12<−1.5.

### Claim 10 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a sum ΣCT of center thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens on the optical axis, and the axial distance TTL from the object-side surface of the first lens to the image plane of the optical imaging lens assembly satisfy: 0.5<ΣCT/TTL<0.7.

### Claim 11

An optical imaging lens assembly comprising, sequentially 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, and a sixth lens,
wherein each of the first lens and the fifth lens has a positive refractive power;
each of the second lens and the sixth lens has a negative refractive power;
at least one of the third lens or the fourth lens has a positive refractive power;
at least one of an object-side surface of the first lens or an image-side surface of the first lens is a convex surface;
an object-side surface and an image-side surface of the sixth lens are concave surfaces; and
an image-side surface of the fifth lens is a convex surface, and a total effective focal length f of the optical imaging lens assembly and a radius of curvature R10 of the image-side surface of the fifth lens satisfy: −3<f/R10<−2.5,
wherein a center thickness CT2 of the second lens on the optical axis and a spacing distance T12 between the first lens and the second lens on the optical axis satisfy: 4.30≤CT2/T12≤5.69, and
an effective focal length f1 of the first lens and a center thickness CT1 of the first lens on the optical axis satisfy: 3<f1/CT1<4.

### Claim 12 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein the object-side surface of the first lens is a convex surface.

### Claim 13 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein a radius of curvature R3 of an object-side surface of the second lens and a radius of curvature R4 of an image-side surface of the second lens satisfy: 1.5<R3/R4<2.5.

### Claim 14 (depends on 13)

The optical imaging lens assembly according to claim 13, wherein the object-side surface of the second lens is a convex surface, and the image-side surface of the second lens is a concave surface.

### Claim 15 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein an effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens assembly satisfy: −2<f2/f<−1.

### Claim 16 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein a radius of curvature R7 of an object-side surface of the fourth lens and a radius of curvature R8 of an image-side surface of the fourth lens satisfy: −1<(R7-R8)/(R7+R8)<2.

### Claim 17 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein an effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens assembly satisfy: 0.5<f5/f<1.

### Claim 18 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein a radius of curvature R11 of the object-side surface of the sixth lens and a radius of curvature R12 of the image-side surface of the sixth lens satisfy: −2<R11/R12<−1.5.

### Claim 19 (depends on 11)

The optical imaging lens assembly according to claim 11, wherein an effective focal length f1 of the first lens and a center thickness CT1 of the first lens on the optical axis satisfy: 3.65<f1/CT1<3.90.