Optical imaging lens assembly

Patent metadata

Field	Value
Publication number	US-12353055-B2
Application number	US-202217691083-A
Country	US
Kind code	B2
Filing date	Mar 9, 2022
Priority date	Mar 9, 2021
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

The present disclosure discloses an optical imaging lens assembly, comprising, sequentially along an optical axis from an object side to an image side: a first lens, having a positive refractive power; a second lens, having a negative refractive power; and a third lens, having a positive refractive power. A magnification M of the optical imaging lens assembly satisfies: 0.5<M<1.5.

First claim

What is claimed is:

1. An optical imaging lens assembly, comprising, sequentially along an optical axis from an object side to an image side:
a first lens, having a positive refractive power;
a second lens, having a negative refractive power; and
a third lens, having a positive refractive power,

wherein, the optical imaging lens assembly satisfies:
0.5< M< 1.5,
where, M is a magnification of the optical imaging lens assembly, and
wherein an axial distance SAG 12 measured along the optical axis, from an intersection point 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, an axial distance SAG 32 measured along the optical axis, from an intersection point of an image-side surface of the third lens and the optical axis to a vertex of an effective radius of the image-side surface of the third lens, an axial distance SAG 31 measured along the optical axis, from an intersection point of an object-side surface of the third lens and the optical axis to a vertex of an effective radius of the object-side surface of the third lens satisfy:
|( SAG 12 + SAG 32 )/ SAG 31|<1.5.

2. The optical imaging lens assembly according to claim 1 , wherein an effective focal length f 1 of the first lens, a total effective focal length f of the optical imaging lens assembly, and an effective focal length f 2 of the second lens satisfy:
0<| f 1 / f+f 2 / f|< 0.5.

3. The optical imaging lens assembly according to claim 1 , wherein a distance OBL from a surface of an object close to the optical imaging lens assembly to a stop of the optical imaging lens assembly on the optical axis, and a distance TTL from an object-side surface of the first lens to an image plane of the optical imaging lens assembly along the optical axis satisfy:
0.5< OBL/TTL< 1.0.

4. The optical imaging lens assembly according to claim 1 , wherein an f-number Fno of the optical imaging lens assembly and half of a maximal field-of-view Semi-FOV of the optical imaging lens assembly satisfy:
3.5<Fno/Tan(Semi-FOV)<4.5.

5. The optical imaging lens assembly according to claim 1 , wherein an effective focal length f 2 of the second lens and an effective focal length f 3 of the third lens satisfy:
−1.5< f 3 / f 2<−0.5.

6. The optical imaging lens assembly according to claim 1 , wherein a center thickness CT 1 of the first lens on the optical axis, a center thickness CT 2 of the second lens on the optical axis, an edge thickness ET 1 of the first lens, and an edge thickness ET 2 of the second lens satisfy:
3.0<CT 1 /ET 1 +ET 2 /CT 2 <4.0.

7. The optical imaging lens assembly according to claim 1 , wherein a maximal effective radius DT 32 of an image-side surface of the third lens and a maximal effective radius DT 11 of an object-side surface of the first lens satisfy:
3.0< DT 32 / DT 11<3.5.

8. The optical imaging lens assembly according to claim 1 , wherein an axial distance SAG 11 from an intersection point 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, an axial distance SAG 12 from an intersection point 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, and an axial distance SAG 22 from an intersection point of an image-side surface of the second lens and the optical axis to a vertex of an effective radius of the image-side surface of the second lens satisfy:
0<( SAG 11 + SAG 12 )/ SAG 22<1.0.

9. The optical imaging lens assembly according to claim 1 , half of a diagonal length ImgH of an effective pixel area on an image plane of the optical imaging lens assembly, and an axial distance SAG 21 from an intersection point of an object-side surface of the second lens and the optical axis to a vertex of an effective radius of the object-side surface of the second lens satisfy:
−6.5<ImgH/ SAG 21<−5.0.

10. The optical imaging lens assembly according to claim 1 , wherein a total effective focal length f of the optical imaging lens assembly, a radius of curvature R 3 of an object-side surface of the second lens, and a radius of curvature R 4 of an image-side surface of the second lens satisfy:
−6.5< f/R 3 + f/R 4<−4.5.

11. The optical imaging lens assembly according to claim 1 , wherein a radius of curvature R 5 of an object-side surface of the third lens and a radius of curvature R 6 of an image-side surface of the third lens satisfy:
4.5<( R 6 + R 5 )/( R 6 - R 5 )<6.5.

Assignees

• Zhejiang Sunny Optics Co Ltd

Inventors

• Li Yang
• He Lingbo
• Dai Fujian
• Zhao Liefeng

Classifications

• G02B13/0035 Primary

  having three lenses · CPC title

• G02B13/18

  with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} · CPC title

• G02B9/14 Primary

  arranged + - + · CPC title