# US 12,007,624 B2 · Optical lens assembly

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- Number: US 12,007,624 B2
- Document ID: US12007624B2
- Status: Granted
- Kind: B2
- Application number: 17/081,191
- Filed: 2020-10-27
- Published: 2021-02-11
- Granted: 2024-06-11
- Earliest claimed: 2018-04-28
- Assignees: Ningbo Sunny Automotive Optech Co., Ltd.
- Applicants: Ningbo Sunny Automotive Optech Co., Ltd
- Inventors: Dongfang Wang; Bo Yao; Bao Zhou
- Web page: https://patentgrep.com/patent/US12007624B2

## CPC

- G02B 9/62: having six components only
- G02B 13/0045: {having five or more lenses}
- 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 lens assembly including, 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. An object-side surface of the first lens is convex, and an image-side surface thereof is concave. The second lens has negative refractive power. The third lens has positive refractive power. The fourth lens has positive refractive power, and both an object-side surface and an image-side surface thereof are convex. The fifth lens has positive refractive power. The sixth lens has negative refractive power.

## Claims

### Claim 1

An optical lens assembly, comprising:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are arranged sequentially from an object side to an image side along an optical axis,
wherein,
a total number of lenses comprised in the optical lens assembly is six;
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;
the second lens has negative refractive power;
the third lens has positive refractive power;
the fourth lens has positive refractive power, and each of an object-side surface and an image-side surface of the fourth lens is convex surface;
the fifth lens has positive refractive power; and
the sixth lens has negative refractive power,
wherein TTL/F≤3.5,
where TTL is a total track length of the optical lens assembly, and F is a total focal length of the optical lens assembly.

### Claim 2 (depends on 1)

The optical lens assembly according to claim 1, wherein each of an object-side surface and an image-side surface of the second lens is concave surface,
wherein each of an object-side surface and an image-side surface of the third lens is convex surface, and
wherein the second lens and the third lens are cemented to form a cemented lens.

### Claim 3 (depends on 1)

The optical lens assembly according to claim 1, wherein an object-side surface of the fifth lens is a convex surface, and an image-side surface of the fifth lens is a concave surface,
wherein an object-side surface of the sixth lens is a convex surface, and an image-side surface of the sixth lens is a concave surface, and
wherein the fifth lens and the sixth lens are cemented to form a cemented lens.

### Claim 4 (depends on 1)

The optical lens assembly according to claim 1, wherein at least one of the first lens and the fourth lens is aspherical lens.

### Claim 5 (depends on 1)

The optical lens assembly according to claim 1, wherein 0.6≤R1/(R2+d1)≤1.1,
where R1 is a radius of curvature of the object-side surface of the first lens,
R2 is a radius of curvature of the image-side surface of the first lens, and
d1 is a center thickness of the first lens along the optical axis.

### Claim 6 (depends on 1)

The optical lens assembly according to claim 1, wherein D/H/FOV≤0.08,
where FOV is a maximum field-of-view of the optical lens assembly,
D is a maximum effective aperture diameter of the object-side surface of the first lens corresponding to the maximum field-of-view of the optical lens assembly, and
H is an image height corresponding to the maximum field-of-view of the optical lens assembly.

### Claim 7 (depends on 1)

The optical lens assembly according to claim 1, wherein BFL/TL≥0.20,
where BFL is an optical back focal length of the optical lens assembly, and
TL is a distance along the optical axis from a center of the object-side surface of the first lens to a center of an image-side surface of the sixth lens.

### Claim 8 (depends on 1)

The optical lens assembly according to claim 1, wherein |F3/F2|≤1.25,
where F3 is a focal length of the third lens, and
F2 is a focal length of the second lens.

### Claim 9 (depends on 1)

The optical lens assembly according to claim 1, wherein 4≤F23/F≤7,
where F23 is a combined focal length of the second lens and the third lens, and
F is a total focal length of the optical lens assembly.

### Claim 10

An optical lens assembly, comprising:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are arranged sequentially from an object side to an image side along an optical axis,
wherein,
a total number of lenses comprised in the optical lens assembly is six;
the second lens has negative refractive power;
the third lens has positive refractive power;
the fourth lens has positive refractive power;
the fifth lens has positive refractive power; and
the sixth lens has negative refractive power,
wherein D/H/FOV≤0.08,
where FOV is a maximum field-of-view of the optical lens assembly,
D is a maximum effective aperture diameter of an object-side surface of the first lens corresponding to the maximum field-of-view of the optical lens assembly, and
H is an image height corresponding to the maximum field-of-view of the optical lens assembly, and
wherein TTL/F≤3.5,
where TTL is a total track length of the optical lens assembly, and F is a total focal length of the optical lens assembly.

### Claim 11 (depends on 10)

The optical lens assembly according to claim 10, wherein the first lens has positive refractive power or negative refractive power, the object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface.

### Claim 12 (depends on 10)

The optical lens assembly according to claim 10, wherein each of an object-side surface and an image-side surface of the second lens is concave surface,
wherein each of an object-side surface and an image-side surface of the third lens is convex surface, and
wherein the second lens and the third lens are cemented to form a cemented lens.

### Claim 13 (depends on 10)

The optical lens assembly according to claim 10, wherein an object-side surface of the fifth lens is a convex surface, and an image-side surface of the fifth lens is a concave surface,
wherein an object-side surface of the sixth lens is a convex surface, and an image-side surface of the sixth lens is a concave surface, and
wherein the fifth lens and the sixth lens are cemented to form a cemented lens.

### Claim 14 (depends on 10)

The optical lens assembly according to claim 10, wherein each of an object-side surface and an image-side surface of the fourth lens is convex surface.

### Claim 15 (depends on 10)

The optical lens assembly according to claim 10, wherein 0.6≤R1/(R2+d1)≤1.1,
where R1 is a radius of curvature of the object-side surface of the first lens,
R2 is a radius of curvature of an image-side surface of the first lens, and
d1 is a center thickness of the first lens along the optical axis.

### Claim 16 (depends on 10)

The optical lens assembly according to claim 10, wherein BFL/TL≥0.20,
where BFL is an optical back focal length of the optical lens assembly, and
TL is a distance along the optical axis from a center of the object-side surface of the first lens to a center of an image-side surface of the sixth lens.

### Claim 17 (depends on 10)

The optical lens assembly according to claim 10, wherein |F3/F2|≤1.25,
where F3 is a focal length of the third lens, and
F2 is a focal length of the second lens.

### Claim 18 (depends on 10)

The optical lens assembly according to claim 10, wherein 4≤F23/F≤7,
where F23 is a combined focal length of the second lens and the third lens, and
F is a total focal length of the optical lens assembly.

### Claim 19 (depends on 1)

The optical lens assembly according to claim 1, wherein the optical lens assembly satisfies one of:
TTL/F≤2.7609;
2.128≤TTL/F≤3.5;
0.2≤BFL/TL≤0.2334, where BFL is an optical back focal length of the optical lens assembly, and TL is a distance along the optical axis from a center of the object-side surface of the first lens to a center of an image-side surface of the sixth lens; or
0.9287≤|F3/F2|≤1.25, where F3 is a focal length of the third lens, and F2 is a focal length of the second lens.

### Claim 20 (depends on 10)

The optical lens assembly according to claim 10, wherein the optical lens assembly satisfies one of:
TTL/F≤2.7609;
2.128≤TTL/F≤3.5;
0.2≤BFL/TL≤0.2334, where BFL is an optical back focal length of the optical lens assembly, and TL is a distance along the optical axis from a center of the object-side surface of the first lens to a center of an image-side surface of the sixth lens; or
0.9287≤|F3/F2|≤1.25, where F3 is a focal length of the third lens, and F2 is a focal length of the second lens.