# US 11,112,586 B2 · Optical imaging lens assembly

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- Number: US 11,112,586 B2
- Document ID: US11112586B2
- Status: Granted
- Kind: B2
- Application number: 16/274,821
- Filed: 2019-02-13
- Published: 2019-08-08
- Granted: 2021-09-07
- Earliest claimed: 2018-02-05
- Assignees: Zhejiang Sunny Optical Co., Ltd
- Applicants: Zhejiang Sunny Optical Co., Ltd
- Inventors: Biao Xu; Kaiyuan Zhang; Jianke Wenren
- Web page: https://patentgrep.com/patent/US11112586B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 5/005: {Diaphragms (for cameras G03B9/02)}
- G02B 9/64: having more than six components
- 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: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An optical imaging lens assembly is provided. The optical imaging lens assembly includes, 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, a fifth lens, a sixth lens, and a seventh lens. The first lens has a positive refractive power, an object-side surface of the first lens is a convex surface; each of the second lens, the third lens, the fourth lens, and the fifth lens has a positive refractive power or a negative refractive power; the sixth lens has a positive refractive power; the seventh lens has a negative refractive power; an image-side surface of the first lens, an image-side surface of the third lens, and an object-side surface and an image-side surface of the seventh lens are concave surfaces; and TTL and ImgH satisfy: TTL/ImgH≤1.4.

## 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, a fifth lens, a sixth lens, and a seventh lens,
wherein the first lens has a positive refractive power, an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface;
each of the second lens, the third lens, the fourth lens, and the fifth lens has a positive refractive power or a negative refractive power;
an image-side surface of the third lens is a concave surface;
the sixth lens has a positive refractive power;
the seventh lens has a negative refractive power, and both an object-side surface and an image-side surface of the seventh lens are concave surfaces; and
a spacing distance TTL of a center of the object-side surface of the first lens to an image plane of the optical imaging lens assembly on the optical axis 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≤1.4,
wherein a distance SAG41 from an intersection point of an object-side surface of the fourth lens and the optical axis to a vertex of an effective radius of the object-side surface of the fourth lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: SAG41/CT4<0.5.

### Claim 2 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a maximum inclination angle β52 of an image-side surface of the fifth lens and a maximum inclination angle β61 of an object-side surface of the sixth lens satisfy: 1.0<β52/β61≤1.7.

### Claim 3 (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 and a radius of curvature R8 of an image-side surface of the fourth lens satisfy: −1.5<(R7+R8)/(R7−R8)≤0.

### Claim 4 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a spacing distance T34 of the third lens and the fourth lens on the optical axis and a spacing distance T67 of the sixth lens and the seventh lens on the optical axis satisfy: T34/T67≤0.50.

### Claim 5 (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: −1.5<R13/R14<−0.5.

### Claim 6 (depends on 5)

The optical imaging lens assembly according to claim 5, wherein a combined focal length f67 of the sixth lens and the seventh lens and a total effective focal length f of the optical imaging lens assembly satisfy: −2.5<f67/f<−1.

### Claim 7 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a total effective focal length f of the optical imaging lens assembly, an effective focal length f1 of the first lens, and an effective focal length f2 of the second lens satisfy: 0.5<f/f1−f/f2<1.5.

### Claim 8 (depends on 1)

The optical imaging lens assembly according to claim 1, wherein a sum of center thicknesses ΣCT of the first lens to the seventh lens on the optical axis and the spacing distance TTL of the center of the object-side surface of the first lens to the image plane of the optical imaging lens assembly on the optical axis satisfy: 0.5<ΣCT/TTL<1.

### Claim 9 (depends on 1)

The optical imaging lens assembly according to claim 1, further comprising a diaphragm,
wherein a spacing distance SL from the diaphragm to the image plane of the optical imaging lens assembly on the optical axis and the spacing distance TTL of the center of the object-side surface of the first lens to the image plane of the optical imaging lens assembly on the optical axis satisfy: 0.5<SL/TTL<1.

### Claim 10

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, a fifth lens, a sixth lens, and a seventh lens,
wherein the first lens has a positive refractive power, an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface;
each of the second lens, the third lens, the fourth lens, and the fifth lens has a positive refractive power or a negative refractive power;
an image-side surface of the third lens is a concave surface;
the sixth lens has a positive refractive power;
the seventh lens has a negative refractive power, and both an object-side surface and an image-side surface of the seventh lens are concave surfaces; and
a combined focal length f67 of the sixth lens and the seventh lens and a total effective focal length f of the optical imaging lens assembly satisfy: −2.5<f67/f<−1.

### Claim 11 (depends on 10)

The optical imaging lens assembly according to claim 10, wherein the total effective focal length f of the optical imaging lens assembly, an effective focal length f1 of the first lens, and an effective focal length f2 of the second lens satisfy: 0.5<f/f1−f/f2<1.5.

### Claim 12 (depends on 10)

The optical imaging lens assembly according to claim 10, 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: −1.5<(R7+R8)/(R7−R8)≤0.

### Claim 13 (depends on 12)

The optical imaging lens assembly according to claim 12, wherein a distance SAG41 from an intersection point of the object-side surface of the fourth lens and the optical axis to a vertex of an effective radius of the object-side surface of the fourth lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: SAG41/CT4<0.5.

### Claim 14 (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: −1.5<R13/R14<−0.5.

### Claim 15 (depends on 10)

The optical imaging lens assembly according to claim 10, wherein a maximum inclination angle β52 of an image-side surface of the fifth lens and a maximum inclination angle β61 of an object-side surface of the sixth lens satisfy: 1.0<β52/β61≤1.7.

### Claim 16 (depends on 10)

The optical imaging lens assembly according to claim 10, wherein a spacing distance T34 of the third lens and the fourth lens on the optical axis and a spacing distance T67 of the sixth lens and the seventh lens on the optical axis satisfy: T34/T67≤0.50.

### Claim 17 (depends on 16)

The optical imaging lens assembly according to claim 16, wherein a sum of center thicknesses ΣCT of the first lens to the seventh lens on the optical axis and a spacing distance TTL of a center of the object-side surface of the first lens to an image plane of the optical imaging lens assembly on the optical axis satisfy: 0.5<ΣCT/TTL<1.

### Claim 18 (depends on 17)

The optical imaging lens assembly according to claim 17, further comprising a diaphragm,
wherein a spacing distance SL from the diaphragm to the image plane of the optical imaging lens assembly on the optical axis and the spacing distance TTL of the center of the object-side surface of the first lens to the image plane of the optical imaging lens assembly on the optical axis satisfy: 0.5<SL/TTL<1.

### Claim 19 (depends on 17)

The optical imaging lens assembly according to claim 17, wherein the spacing distance TTL of the center of the object-side surface of the first lens to the image plane of the optical imaging lens assembly on the optical axis 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≤1.4.