Optical imaging lens assembly

Patent metadata

Field	Value
Publication number	US-11029494-B2
Application number	US-201816212377-A
Country	US
Kind code	B2
Filing date	Dec 6, 2018
Priority date	Jul 25, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly includes, 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 and a fifth lens. The first lens has a positive refractive power, 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 a positive refractive power or a negative refractive power. The third lens has a negative refractive power. The fourth lens has a positive refractive power. The fifth lens has a negative refractive power, and an image-side surface of the fifth lens is a convex surface. A total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.9.

First claim

What is claimed is:

1. An optical imaging lens assembly comprising, 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 and a fifth lens,
wherein the first lens has a positive refractive power, 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 a positive refractive power or a negative refractive power;
the third lens has a negative refractive power;
the fourth lens has a positive refractive power;
the fifth lens has a negative refractive power, and an image-side surface of the fifth lens is a convex surface; and
a total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.9,
wherein the total effective focal length f of the optical imaging lens assembly and an effective focal length f2 of the second lens satisfy: f/|f2|≤0.1.

2. The optical imaging lens assembly according to claim 1 , wherein a combined refractive power of the first lens and the second lens is a positive refractive power, and a combined focal length f12 of the first lens and the second lens and the total effective focal length f of the optical imaging lens assembly satisfy: 0.8<f/f12<1.2.

3. The optical imaging lens assembly according to claim 1 , wherein the total effective focal length f of the optical imaging lens assembly and an effective focal length f4 of the fourth lens satisfy: 1.3≤f/f4≤1.6.

4. The optical imaging lens assembly according to claim 1 , wherein the total effective focal length f of the optical imaging lens assembly and an effective focal length f5 of the fifth lens satisfy: −1.8≤f/f5≤−1.5.

5. The optical imaging lens assembly according to claim 1 , wherein a radius of curvature R2 of the image-side surface of the first lens and a radius of curvature R6 of an image-side surface of the third lens satisfy: |R2/R6|≤0.1.

6. The optical imaging lens assembly according to claim 5 , wherein the radius of curvature R6 of the image-side surface of the third lens and a radius of curvature R7 of an object-side surface of the fourth lens satisfy: 0≤R6/R7<10.

7. The optical imaging lens assembly according to claim 1 , wherein a center thickness CT3 of the third lens on the optical axis and a radius of curvature R5 of an object-side surface of the third lens satisfy: CT3/|R5|<0.1.

8. The optical imaging lens assembly according to claim 1 , wherein the total effective focal length f of the optical imaging lens assembly and a center thickness CT4 of the fourth lens on the optical axis satisfy: 6<f/CT4<9.

9. The optical imaging lens assembly according to claim 1 , wherein, TTL/ImgH<1.6,
TTL is a distance from a center of the object-side surface of the first lens to an image plane of the optical imaging lens assembly on the optical axis; and
ImgH is half of a diagonal length of an effective pixel area on the image plane of the optical imaging lens assembly.

10. An optical imaging lens assembly comprising, 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 and a fifth lens,
wherein at least one of the first lens and the fourth lens has a positive refractive power;
at least one of the third lens and the fifth lens has a negative refractive power;
the second lens has a positive refractive power or a negative refractive power, and an effective focal length f2 of the second lens and a total effective focal length f of the optical imaging lens assembly satisfy: f/|f2|≤0.1; and
a combined refractive power of the first lens and the second lens is a positive refractive power, and a combined focal length f12 of the first lens and the second lens and the total effective focal length f of the optical imaging lens assembly satisfy: 0.8<f/f12<1.2.

11. The optical imaging lens assembly according to claim 10 , wherein 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.

12. The optical imaging lens assembly according to claim 11 , wherein a radius of curvature R2 of the image-side surface of the first lens and a radius of curvature R6 of an image-side surface of the third lens satisfy: |R2/R6|≤0.1.

13. The optical imaging lens assembly according to claim 10 , wherein an image-side surface of the fifth lens is a convex surface.

14. The optical imaging lens assembly according to claim 10 , wherein each of the first lens and the fourth lens has a positive refractive power.

15. The optical imaging lens assembly according to claim 14 , wherein the total effective focal length f of the optical imaging lens assembly and an effective focal length f4 of the fourth lens satisfy: 1.3≤f/f4≤1.6.

16. The optical imaging lens assembly according to claim 14 , wherein the total effective focal length f of the optical imaging lens assembly and a center thickness CT4 of the fourth lens on the optical axis satisfy: 6<f/CT4<9.

17. The optical imaging lens assembly according to claim 10 , wherein each of the third lens and the fifth lens has a negative refractive power.

18. The optical imaging lens assembly according to claim 17 , wherein the total effective focal length f of the optical imaging lens assembly and an effective focal length f5 of the fifth lens satisfy: −1.8≤f/f5≤−1.5.

19. The optical imaging lens assembly according to claim 17 , wherein a center thickness CT3 of the third lens on the optical axis and a radius of curvature R5 of an object-side surface of the third lens satisfy: CT3/|R5|≤0.1.

20. The optical imaging lens assembly according to claim 10 , wherein a radius of curvature R6 of an image-side surface of the third lens and a radius of curvature R7 of an object-side surface of the fourth lens satisfy: 0≤R6/R7<10.

21. The optical imaging lens assembly according to claim 10 , wherein, TTL/ImgH<1.6,
TTL is a distance from a center of an object-side surface of the first lens to an image plane of the optical imaging lens assembly on the optical axis; and
ImgH is half of a diagonal length of an effective pixel area on the image plane of the optical imaging lens assembly.

22. The optical imaging lens assembly according to claim 21 , wherein the total effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: f/EPD≤1.9.

Assignees

• Zhejiang Sunny Optical Co Ltd

Inventors

• Song Bo

Classifications

• G02B9/60

  having five components only · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title