# US 12,216,249 B2 · Optical imaging lens including six lenses of +-+-+-or +++-+-refractive powers

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- Number: US 12,216,249 B2
- Document ID: US12216249B2
- Status: Granted
- Kind: B2
- Application number: 17/145,423
- Filed: 2021-01-11
- Published: 2021-09-23
- Granted: 2025-02-04
- Earliest claimed: 2020-03-19
- Assignees: Zhejiang Sunny Optics Co., Ltd.
- Applicants: Zhejiang Sunny Optics Co., Ltd.
- Inventors: Nian Chen; Kaiyuan Zhang; Xujiong Wu; Fujian Dai; Liefeng Zhao
- Web page: https://patentgrep.com/patent/US12216249B2

## CPC

- G02B 13/0045: {having five or more lenses}
- G02B 9/62: having six components only
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The disclosure discloses an optical imaging lens, which sequentially includes, from an object side to an image side along an optical axis: a first lens having positive refractive power; a second lens having refractive power; a third lens having refractive power; a fourth lens having negative refractive power, wherein an object-side surface thereof is a concave surface, while an image-side surface is a convex surface; a fifth lens having positive refractive power; and a sixth lens having negative refractive power, wherein an object-side surface thereof is a convex surface. TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens, TTL and ImgH meet 4.0 mm<ImgH/(TTL/ImgH)<7.0 mm. Therefore, the optical imaging lens has high imaging quality.

## Claims

### Claim 1

An optical imaging lens, sequentially comprising, from an object side to an image side along an optical axis:
a first lens having positive refractive power;
a second lens having refractive power;
a third lens having refractive power;
a fourth lens having negative refractive power, wherein an object-side surface thereof is a concave surface, while an image-side surface is a convex surface;
a fifth lens having positive refractive power; and
a sixth lens having negative refractive power, wherein an object-side surface thereof is a convex surface; and
TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens, TTL and ImgH meet:
4.0 mm<ImgH/(TTL/ImgH)<7.0 mm;
an effective focal length f4 of the fourth lens, an effective focal length f6 of the sixth lens and a total effective focal length f of the optical imaging lens meet:
0.6<(f6−f4)/f<2.0;
an effective focal length f1 of the first lens and an effective focal length f5 of the fifth lens meet:
0.7<f1/f5<1.2;
a curvature radius R7 of the object-side surface of the fourth lens and a curvature radius R8 of the image-side surface of the fourth lens meet:
0.4<R7/R8<0.7;
a maximum effective radius DT11 of the object-side surface of the first lens, a maximum effective radius DT12 of an image-side surface of the first lens and a maximum effective radius DT62 of an image-side surface of the sixth lens meet:
1.3<DT62/(DT11+DT12)<1.7;
a combined focal length f123 of the first lens, the second lens and the third lens and a total effective focal length f of the optical imaging lens meet:
0.7<f123/f<1.0;
1.5<SAG62/SAG32<3.4,
wherein SAG32 is an on-axis distance from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens, and SAG62 is an on-axis distance from an intersection point of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens.

### Claim 2 (depends on 1)

The optical imaging lens as claimed in claim 1, wherein TTL and ImgH meet:
TTL/ImgH<1.3.

### Claim 3 (depends on 1)

The optical imaging lens as claimed in claim 1, wherein a total effective focal length f of the optical imaging lens and a maximum semi-field of view (Semi-FOV) of the optical imaging lens meet:
5.0 mm<f×tan(Semi-FOV)<7.0 mm.

### Claim 4 (depends on 1)

The optical imaging lens as claimed in claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis and an air space T56 of the fifth lens and the sixth lens on the optical axis meet:
0.7<(CT5+CT6)/T56<1.5.

### Claim 5 (depends on 1)

The optical imaging lens as claimed in claim 1, wherein an effective focal length f3 of the third lens and a curvature radius R6 of an image-side surface of the third lens meet:
−2.7<f3/R6<−1.6.

### Claim 6 (depends on 1)

The optical imaging lens as claimed in claim 1, wherein the center thickness CT5 of the fifth lens on the optical axis and an edge thickness ET5 of the fifth lens meet:
1.6<CT5/ET5<2.4.

### Claim 7 (depends on 1)

The optical imaging lens as claimed in claim 1, wherein
0.5<(SAG41+SAG42)/(SAG51+SAG52)<0.9,
wherein SAG41 is an on-axis distance from an intersection point of the object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens, SAG42 is an on-axis distance from an intersection point of the image-side surface of the fourth lens and the optical axis to an effective radius vertex of the image-side surface of the fourth lens, SAG51 is an on-axis distance from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, and SAG52 is an on-axis distance from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens.