Optical imaging lens assembly

Patent metadata

Field	Value
Publication number	US-12044827-B2
Application number	US-202117148260-A
Country	US
Kind code	B2
Filing date	Jan 13, 2021
Priority date	Feb 21, 2020
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

The present disclosure discloses an optical imaging 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. Each of the first to the sixth lenses has reactive power. The second lens has positive refractive power. An image-side surface of the fourth lens is concave. A radius of curvature R2 of an image-side surface of the first lens, a radius of curvature R5 of an object-side surface of the third lens and an effective focal length f3 of the third lens satisfy: 2.5<(R2+R5)/f3<11.0.

First claim

What is claimed is:

1. An optical imaging lens assembly, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are sequentially arranged from an object side to an image side of the optical imaging lens assembly along an optical axis, and each of the first to the sixth lenses having refractive power,
the second lens having positive refractive power;
an image-side surface of the fourth lens being concave,
wherein 2.5<(R2+R5)/f3<11.0, and
1.0<( R 8+ R 10)/ f< 2.0,

where R2 is a radius of curvature of an image-side surface of the first lens, R5 is a radius of curvature of an object-side surface of the third lens, R8 is a radius of curvature of the image-side surface of the fourth lens, R10 is a radius of curvature of an image-side surface of the fifth lens, f is a total effective focal length of the optical imaging lens assembly, and f3 is an effective focal length of the third lens.

2. The optical imaging lens assembly according to claim 1 , wherein TTL/f<1,
where TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly, and f is a total effective focal length of the optical imaging lens assembly.

3. The optical imaging lens assembly according to claim 1 , wherein 1.0 mm<tan(Semi-Fov)*f1<1.6 mm,
where Semi-Fov is half of a maximum field-of-view of the optical imaging lens assembly, and f1 is an effective focal length of the first lens.

4. The optical imaging lens assembly according to claim 1 , wherein an object-side surface of the second lens is convex, and an image-side surface of the second lens is concave.

5. The optical imaging lens assembly according to claim 1 , wherein 3.0<f/R1<4.0,
where f is a total effective focal length of the optical imaging lens assembly, and R1 is a radius of curvature of an object-side surface of the first lens.

6. The optical imaging lens assembly according to claim 1 , wherein 1.0<CT1/CT6<3.0,
where CT1 is a center thickness of the first lens along the optical axis, and CT6 is a center thickness of the sixth lens along the optical axis.

7. The optical imaging lens assembly according to claim 1 , wherein 1.5<T45/T34<4.5,
where T34 is an air interval between the third lens and the fourth lens along the optical axis, and T45 is an air interval between the fourth lens and the fifth lens along the optical axis.

8. The optical imaging lens assembly according to claim 1 , wherein 0.5<T56/CT5<2.5,
where CT5 is a center thickness of the fifth lens along the optical axis, and T56 is an air interval between the fifth lens and the sixth lens along the optical axis.

9. The optical imaging lens assembly according to claim 1 , wherein 1.5<f2/(|R3+R9|)<4.0,
where f2 is an effective focal length of the second lens, R3 is a radius of curvature of an object-side surface of the second lens, and R9 is a radius of curvature of an object-side surface of the fifth lens.

10. The optical imaging lens assembly according to claim 1 , wherein an object-side surface of the first lens is convex, and the image-side surface of the first lens is convex.

11. The optical imaging lens assembly according to claim 1 , wherein an object-side surface of the sixth lens is convex, and an image-side surface of the sixth lens is concave.

12. An optical imaging lens assembly, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are sequentially arranged from an object side to an image side of the optical imaging lens assembly along an optical axis, and each of the first to the sixth lenses having refractive power,
an image-side surface of the fourth lens being concave,
wherein TTL/f<1, and
1.0<( R 8+ R 10)/ f< 2.0,

where TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly, R8 is a radius of curvature of the image-side surface of the fourth lens, R10 is a radius of curvature of an image-side surface of the fifth lens, and f is a total effective focal length of the optical imaging lens assembly.

13. The optical imaging lens assembly according to claim 12 , wherein 1.0 mm<tan(Semi-Fov)*f1<1.6 mm,
where Semi-Fov is half of a maximum field-of-view of the optical imaging lens assembly, and f1 is an effective focal length of the first lens.

14. The optical imaging lens assembly according to claim 12 , wherein the second lens has positive refractive power, an object-side surface of the second lens is convex, and an image-side surface of the second lens is concave.

15. The optical imaging lens assembly according to claim 12 , wherein 3.0<f/R1<4.0,
where f is the total effective focal length of the optical imaging lens assembly, and R1 is a radius of curvature of the object-side surface of the first lens.

16. The optical imaging lens assembly according to claim 12 , wherein 1.0<CT1/CT6<3.0,
where CT1 is a center thickness of the first lens along the optical axis, and CT6 is a center thickness of the sixth lens along the optical axis.

17. The optical imaging lens assembly according to claim 12 , wherein 1.5<T45/T34<4.5,
where T34 is an air interval between the third lens and the fourth lens along the optical axis, and T45 is an air interval between the fourth lens and the fifth lens along the optical axis.

18. The optical imaging lens assembly according to claim 12 , wherein 1.5<f2/(|R3+R9|)<4.0,
where f2 is an effective focal length of the second lens, R3 is a radius of curvature of an object-side surface of the second lens, and R9 is a radius of curvature of an object-side surface of the fifth lens.

Assignees

• Zhejiang Sunny Optics Co Ltd

Inventors

• Li Yanping
• He Lingbo
• Li Jianjun
• Dai Fujian
• Zhao Liefeng

Classifications

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title

• G02B13/02

  Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length · CPC title

• G02B9/62

  having six components only · 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

• G02B13/0045 Primary

  having five or more lenses · CPC title