# US 2021/0278634 A1 · Optical Imaging Lens Assembly

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- Number: US 2021/0278634 A1
- Document ID: US20210278634A1
- Status: Published application
- Kind: A1
- Application number: 16/489,704
- Filed: 2018-09-26
- Published: 2021-09-09
- Earliest claimed: 2017-11-16
- Assignees: Zhejiang Sunny Optical Co., Ltd
- Applicants: Zhejiang Sunny Optical Co., Ltd
- Inventors: Yabin HU; Bo SONG; Ling DING
- Web page: https://patentgrep.com/patent/US20210278634A1

## CPC

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

## Abstract

An optical imaging lens assembly is provided. The optical imaging lens includes a first lens (E1), a second lens (E2), a third lens (E3), a fourth lens (E4), a fifth lens (E5), a sixth lens (E6) and a seventh lens (E7) which are provided in sequence from an object side to an image side along an optical axis and have refractive powers. The first lens has a positive refractive power. The fourth lens has a positive refractive power. The sixth lens has a negative refractive power. The seventh lens has a negative refractive power. An object-side surface (S7) of the fourth lens is a concave surface, and an image-side surface (S8) is a convex surface. An object-side surface (S9) of the fifth lens is a convex surface.

## Claims

### Claim 1

An optical imaging lens assembly, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are provided in sequence from an object side to an image side along an optical axis and have refractive powers, wherein
the first lens has a positive refractive power;
the fourth lens has a positive refractive power, an object-side surface of the fourth lens is a concave surface, and an image-side surface is a convex surface;
an object-side surface of the fifth lens is a convex surface;
the sixth lens has a negative refractive power; and
the seventh lens has a negative refractive power.

### Claim 2 (depends on 1)

The optical imaging lens assembly as claimed in claim 1, wherein an object-side surface of the seventh lens is a concave surface.

### Claim 3 (depends on 1)

The optical imaging lens assembly as claimed in claim 1, wherein an effective focal length f1 of the first lens and a center thickness CT1 of the first lens satisfy the following relationship: 4.5<f1/CT1<6.5.

### Claim 4 (depends on 1)

The optical imaging lens assembly as claimed in claim 1, wherein an effective focal length f4 of the fourth lens and an effective focal length f of the optical imaging lens assembly satisfy the following relationship: 0.5<f4/f<1.5.

### Claim 5 (depends on 1)

The optical imaging lens assembly as claimed in claim 1, wherein an effective focal length f4 of the fourth lens and a radius of curvature R7 of the object-side surface of the fourth lens satisfy the following relationship: −2<f4/R7<−1.

### Claim 6 (depends on 1)

The optical imaging lens assembly as claimed in claim 1, wherein a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of an image-side surface of the fifth lens satisfy the following relationship: 0<|R9/R10|<10.

### Claim 7 (depends on 1)

The optical imaging lens assembly as claimed in claim 1, wherein an effective focal length f6 of the sixth lens and a center thickness CT6 of the sixth lens satisfy the following relationship: 32<|f6/CT6|<64.

### Claim 8 (depends on 1)

The optical imaging lens assembly as claimed in claim 1, wherein a maximum inclination angle β7 of an image-side surface of the seventh lens satisfies the following relationship: 15°≤β7≤51°.

### Claim 9 (depends on 1)

The optical imaging lens assembly as claimed in claim 1, wherein a radius of curvature R13 of an object-side surface of the seventh lens and a center thickness CT7 of the seventh lens satisfy the following relationship: −12<R13/CT7<−8.

### Claim 10

The optical imaging lens assembly as claimed in 1, wherein an effective focal length f of the optical imaging lens assembly and an Entrance Pupil Diameter (EPD) of the optical imaging lens assembly satisfy the following relationship: f/EPD≤2.0.

### Claim 11

The optical imaging lens assembly as claimed in 1, 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 the following relationship: −46<(R3+R4)/(R3−R4)<6.

### Claim 12

The optical imaging lens assembly as claimed in 1, wherein an effective focal length f1 of the first lens and an effective focal length f7 of the seventh lens satisfy the following relationship: 0.5<|f1/f7|<1.5.

### Claim 13

An optical imaging lens assembly, comprising, sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are provided in sequence from an object side to an image side along an optical axis and have refractive powers, wherein
the first lens has a positive refractive power;
the fourth lens has a positive refractive power, and an object-side surface of the fourth lens is a concave surface;
an object-side surface of the fifth lens is a convex surface;
the sixth lens has a negative refractive power;
the seventh lens has a negative refractive power; and
an effective focal length f4 of the fourth lens and an effective focal length f of the optical imaging lens assembly satisfy the following relationship: 0.5<f4/f<1.5

### Claim 14 (depends on 13)

The optical imaging lens assembly as claimed in claim 13, wherein an effective focal length f1 of the first lens and a center thickness CT1 of the first lens satisfy the following relationship: 4.5<f1/CT1<6.5.

### Claim 15 (depends on 13)

The optical imaging lens assembly as claimed in claim 13, wherein an effective focal length f4 of the fourth lens and a radius of curvature R7 of the object-side surface of the fourth lens satisfy the following relationship: −2<f4/R7<−1.

### Claim 16 (depends on 13)

The optical imaging lens assembly as claimed in claim 13, wherein a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of an image-side surface of the fifth lens satisfy the following relationship: 0<|R9/R10|<10.

### Claim 17 (depends on 13)

The optical imaging lens assembly as claimed in claim 13, wherein an effective focal length f6 of the sixth lens and a center thickness CT6 of the sixth lens satisfy the following relationship: 32<|f6/CT6|<64.

### Claim 18 (depends on 13)

The optical imaging lens assembly as claimed in claim 13, wherein a maximum inclination angle β7 of an image-side surface of the seventh lens satisfies the following relationship: 15°≤β7≤51°.

### Claim 19 (depends on 13)

The optical imaging lens assembly as claimed in claim 13, wherein a radius of curvature R13 of an object-side surface of the seventh lens and a center thickness CT7 of the seventh lens satisfy the following relationship: −12<R13/CT7<−8.

### Claim 20 (depends on 13, 14, 15, 16, 17, 18, 19)

The optical imaging lens assembly as claimed in any one of claims 13-19, wherein an effective focal length f of the optical imaging lens assembly and an Entrance Pupil Diameter (EPD) of the optical imaging lens assembly satisfy the following relationship: f/EPD≤2.0, or
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 the following relationship: −46<(R3+R4)/(R3−R4)<6, or
wherein an effective focal length f1 of the first lens and an effective focal length f7 of the seventh lens satisfy the following relationship: 0.5<|f1/f7|<1.5.

### Claim 21

(canceled)

### Claim 22

(canceled)