# US 2021/0278632 A1 · Camera lens assembly

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- Number: US 2021/0278632 A1
- Document ID: US20210278632A1
- Status: Published application
- Kind: A1
- Application number: 17/160,322
- Filed: 2021-01-27
- Published: 2021-09-09
- Earliest claimed: 2020-03-03
- Applicants: Zhejiang Sunny Optics Co., Ltd
- Inventors: Xinquan Wang; Yunbing Ji; Fujian Dai; Liefeng Zhao
- Web page: https://patentgrep.com/patent/US20210278632A1

## CPC

- G02B 9/64: having more than six components
- G02B 13/0045: {having five or more lenses}
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present disclosure discloses a camera lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power; a second lens having negative refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; a seventh lens having positive refractive power; and an eighth lens having negative refractive power. A combined focal length f67 of the sixth lens and the seventh lens and a distance BFL along the optical axis from an image-side surface of the eighth lens to an imaging plane of the camera lens assembly satisfy: 7.00<f67/BFL<14.00.

## Claims

### Claim 1

A camera lens assembly, sequentially from an object side to an image side of the camera lens assembly along an optical axis, comprising:
a first lens having positive refractive power;
a second lens having negative refractive power;
a third lens having refractive power;
a fourth lens having refractive power;
a fifth lens having refractive power;
a sixth lens having refractive power;
a seventh lens having positive refractive power; and
an eighth lens having negative refractive power,
wherein 7.00<f67/BFL<14.00,
where f67 is a combined focal length of the sixth lens and the seventh lens, and BFL is a distance along the optical axis from an image-side surface of the eighth lens to an imaging plane of the camera lens assembly.

### Claim 2 (depends on 1)

The camera lens assembly according to claim 1, wherein 6.00 mm≤ImgH,
where ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the camera lens assembly.

### Claim 3 (depends on 1)

The camera lens assembly according to claim 1, wherein 8.00 mm<f/tan2(Semi-FOV)<9.00 mm,
where f is a total effective focal length of the camera lens assembly, and Semi-FOV is half of a maximal field-of-view of the camera lens assembly.

### Claim 4 (depends on 1)

The camera lens assembly according to claim 1, wherein TTL/ImgH<1.32,
where TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane of the camera lens assembly, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the camera lens assembly.

### Claim 5 (depends on 1)

The camera lens assembly according to claim 1, wherein 1.00<R5/f<3.50,
where f is a total effective focal length of the camera lens assembly, and R5 is a radius of curvature of an object-side surface of the third lens.

### Claim 6 (depends on 1)

The camera lens assembly according to claim 1, wherein 13.00<CT1/T12<30.00,
where T12 is a spaced interval between the first lens and the second lens along the optical axis, and CT1 is a center thickness of the first lens along the optical axis.

### Claim 7 (depends on 1)

The camera lens assembly according to claim 1, wherein 1.50<(R2+R3)/(R2−R3)<2.50,
where R2 is a radius of curvature of an image-side surface of the first lens, and R3 is a radius of curvature of an object-side surface of the second lens.

### Claim 8 (depends on 1)

The camera lens assembly according to claim 1, wherein 7.00<SAG11/SAG12<10.00,
where SAG11 is a distance along the optical axis from an intersection of an object-side surface of the first lens and the optical axis to a vertex of an effective radius of the object-side surface of the first lens, and SAG12 is a distance along the optical axis from an intersection of an image-side surface of the first lens and the optical axis to a vertex of an effective radius of the image-side surface of the first lens.

### Claim 9 (depends on 1)

The camera lens assembly according to claim 1, wherein 2.00<(DT82+DT11)/(DT82−DT11)<3.00,
where DT82 is a maximum effective radius of the image-side surface of the eighth lens, and DT11 is a maximum effective radius of an object-side surface of the first lens.

### Claim 10 (depends on 1)

The camera lens assembly according to claim 1, wherein 1.00<ET8/ET7<3.00,
where ET7 is an edge thickness of the seventh lens, and ET8 is an edge thickness of the eighth lens.

### Claim 11 (depends on 1)

The camera lens assembly according to claim 1, wherein 0.50<f78/f23<4.50,
where f23 is a combined focal length of the second lens and the third lens, and f78 is a combined focal length of the seventh lens and the eighth lens.

### Claim 12

A camera lens assembly, sequentially from an object side to an image side of the camera lens assembly along an optical axis, comprising:
a first lens having positive refractive power;
a second lens having negative refractive power;
a third lens having refractive power;
a fourth lens having refractive power;
a fifth lens having refractive power;
a sixth lens having refractive power;
a seventh lens having positive refractive power; and
an eighth lens having negative refractive power,
wherein 0.50<f78/f23<4.50,
where f23 is a combined focal length of the second lens and the third lens, and f78 is a combined focal length of the seventh lens and the eighth lens.

### Claim 13 (depends on 12)

The camera lens assembly according to claim 12, wherein 6.00 mm≤ImgH,
where ImgH is half of a diagonal length of an effective pixel area on an imaging plane of the camera lens assembly.

### Claim 14 (depends on 12)

The camera lens assembly according to claim 12, wherein 8.00 mm<f/tan2(Semi-FOV)<9.00 mm,
where f is a total effective focal length of the camera lens assembly, and Semi-FOV is half of a maximal field-of-view of the camera lens assembly.

### Claim 15 (depends on 12)

The camera lens assembly according to claim 12, wherein TTL/ImgH<1.32,
where TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the camera lens assembly, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the camera lens assembly.

### Claim 16 (depends on 12)

The camera lens assembly according to claim 12, wherein 1.00<R5/f<3.50,
where f is a total effective focal length of the camera lens assembly, and R5 is a radius of curvature of an object-side surface of the third lens.

### Claim 17 (depends on 12)

The camera lens assembly according to claim 12, wherein 13.00<CT1/T12<30.00,
where T12 is a spaced interval between the first lens and the second lens along the optical axis, and CT1 is a center thickness of the first lens along the optical axis.

### Claim 18 (depends on 12)

The camera lens assembly according to claim 12, wherein 1.50<(R2+R3)/(R2−R3)<2.50,
where R2 is a radius of curvature of an image-side surface of the first lens, and R3 is a radius of curvature of an object-side surface of the second lens.

### Claim 19 (depends on 12)

The camera lens assembly according to claim 12, wherein 7.00<SAG11/SAG12<10.00,
where SAG11 is a distance along the optical axis from an intersection of an object-side surface of the first lens and the optical axis to a vertex of an effective radius of the object-side surface of the first lens, and SAG12 is a distance along the optical axis from an intersection of an image-side surface of the first lens and the optical axis to a vertex of an effective radius of the image-side surface of the first lens.

### Claim 20 (depends on 12)

The camera lens assembly according to claim 12, wherein 2.00<(DT82+DT11)/(DT82−DT11)<3.00,
where DT82 is a maximum effective radius of an image-side surface of the eighth lens, and DT11 is a maximum effective radius of an object-side surface of the first lens.