Optical imaging lens assembly

Patent metadata

Field	Value
Publication number	US-11940601-B2
Application number	US-202017021399-A
Country	US
Kind code	B2
Filing date	Sep 15, 2020
Priority date	Nov 27, 2018
Publication date	Mar 26, 2024
Grant date	Mar 26, 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, a sixth lens and a seventh lens. The first lens has negative refractive power; the second lens has negative refractive power; the third lens has positive refractive power; the fourth lens has positive refractive power; the fifth lens has refractive power, and an object-side surface thereof is a concave surface; the sixth lens has refractive power; and the seventh lens has negative refractive power. An effective focal length f1 of the first lens and a total effective focal length f of the optical imaging lens assembly satisfy −3.5<f1/f<0.

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, a fifth lens, a sixth lens and a seventh lens,
wherein,
the first lens has negative refractive power;
the second lens has negative refractive power;
the third lens has positive refractive power;
the fourth lens has positive refractive power;
the fifth lens has negative refractive power, and an object-side surface of the fifth lens is a concave surface;
the sixth lens has refractive power; and
the seventh lens has negative refractive power,
wherein −3.5<f1/f<0, and
0.5<CT3/(CT4+CT6)<1.2,
where f1 is an effective focal length of the first lens, f is a total effective focal length of the optical imaging lens assembly, CT3 is a center thickness of the third lens along the optical axis, CT4 is a center thickness of the fourth lens along the optical axis, and CT6 is a center thickness of the sixth lens along the optical axis.

2. The optical imaging lens assembly according to claim 1 , wherein 0.2<(R3+R4)/|f2|<1.2,
where R3 is a radius of curvature of an object-side surface of the second lens, R4 is a radius of curvature of an image-side surface of the second lens, and f2 is an effective focal length of the second lens.

3. The optical imaging lens assembly according to claim 1 , wherein 0.3<f4/f3<0.9,
where f3 is an effective focal length of the third lens, and f4 is an effective focal length of the fourth lens.

4. The optical imaging lens assembly according to claim 1 , wherein 0.5<f/f456<1,
where f is the total effective focal length of the optical imaging lens assembly, and f456 is a combined focal length of the fourth lens, the fifth lens and the sixth lens.

5. The optical imaging lens assembly according to claim 1 , wherein 0.9<f/R5+f/R7<1.4,
where f is the total effective focal length of the optical imaging lens assembly, R5 is a radius of curvature of an object-side surface of the third lens, and R7 is a radius of curvature of an object-side surface of the fourth lens.

6. The optical imaging lens assembly according to claim 1 , wherein 0.3<f6/|(R9+R12)|<0.8,
where f6 is an effective focal length of the sixth lens, R9 is a radius of curvature of the object-side surface of the fifth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens.

7. The optical imaging lens assembly according to claim 1 , wherein −0.6<R14/f7<0,
where f7 is an effective focal length of the seventh lens, and R14 is a radius of curvature of an image-side surface of the seventh lens.

8. The optical imaging lens assembly according to claim 1 , wherein 0.2<|R2/R1|<0.8,
where R1 is a radius of curvature of an object-side surface of the first lens, and R2 is a radius of curvature of an image-side surface of the first lens.

9. The optical imaging lens assembly according to claim 1 , wherein 0<T23/f<1,
where T23 is a spaced interval between the second lens and the third lens along the optical axis, and f is the total effective focal length of the optical imaging lens assembly.

10. The optical imaging lens assembly according to claim 1 , wherein the sixth lens has a positive refractive power.

11. The optical imaging lens assembly according to claim 1 , wherein 0.7<(CT1+CT2+T23)/(ET1+ET2)<1.2,
where CT1 is a center thickness of the first lens along the optical axis, CT2 is a center thickness of the second lens along the optical axis, T23 is a spaced interval between the second lens and the third lens along the optical axis, ET1 is an edge thickness of the first lens, and ET2 is an edge thickness of the second lens.

12. The optical imaging lens assembly according to claim 1 , wherein 0<SAG72/SAG71<1,
where SAG71 is an on-axis distance from an intersection of an object-side surface of the seventh lens and the optical axis to a vertex of an effective half-aperture of the object-side surface of the seventh lens, and SAG72 is an on-axis distance from an intersection of an image-side surface of the seventh lens and the optical axis to a vertex of an effective half-aperture of the image-side surface of the seventh lens.

13. The optical imaging lens assembly according to claim 1 , wherein 2.1 rad<(semi-FOV−CRA)*TTL/ImgH<2.6 rad,
where semi-FOV is half of a maximal field-of-view of the optical imaging lens assembly, CRA is an incident angle of a chief ray on an imaging plane corresponding to half of the maximal field-of-view of the optical imaging lens assembly, TTL is a distance along the optical axis from an object-side surface of the first lens to the imaging plane of the optical imaging lens assembly, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the optical imaging lens assembly.

14. 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, a fifth lens, a sixth lens and a seventh lens,
wherein,
the first lens has negative refractive power, and an object-side surface of the first lens is a concave surface;
the second lens has negative refractive power;
the third lens has positive refractive power;
the fourth lens has positive refractive power;
the fifth lens has negative refractive power;
the sixth lens has refractive power; and
the seventh lens has refractive power, and an image-side surface of the seventh lens is a concave surface,
wherein 0.5<f/f456<1, and
0.5<CT3/(CT4+CT6)<1.2,
where f is a total effective focal length of the optical imaging lens assembly, f456 is a combined focal length of the fourth lens, the fifth lens and the sixth lens, CT3 is a center thickness of the third lens along the optical axis, CT4 is a center thickness of the fourth lens along the optical axis, and CT6 is a center thickness of the sixth lens along the optical axis.

15. The optical imaging lens assembly according to claim 14 , wherein −3.5<f1/f<0,
where f1 is an effective focal length of the first lens, and f is the total effective focal length of the optical imaging lens assembly.

16. The optical imaging lens assembly according to claim 14 , wherein 0.9<f/R5+f/R7<1.4,
where f is the total effective focal length of the optical imaging lens assembly, R5 is a radius of curvature of an object-side surface of the third lens, and R7 is a radius of curvature of an object-side surface of the fourth lens.

17. The optical imaging lens assembly according to claim 14 , wherein 0.3<f6/|(R9+R12)|<0.8,
where f6 is an effective focal length of the sixth lens, R9 is a radius of curvature of an object-side surface of the fifth lens, and R12 is a radius of curvature of an image-side surface of the sixth lens.

18. The optical imaging lens assembly according to claim 14 , wherein 0<T23/f<1,
where T23 is a spaced interval between the second lens and the third lens along the optical axis, and f is the total effective focal length of the optical imaging lens assembly.

19. The optical imaging lens assembly according to claim 14 , wherein 0.7<(CT1+CT2+T23)/(ET1+ET2)<1.2,
where CT1 is a center thickness of the first lens along the optical axis, CT2 is a center thickness of the second lens along the optical axis, T23 is a spaced interval between the second lens and the third lens along the optical axis, ET1 is an edge thickness of the first lens, and ET2 is an edge thickness of the second lens.

20. The optical imaging lens assembly according to claim 14 ,

Assignees

• Zhejiang Sunny Optical Co Ltd

Inventors

• Wang Xinquan
• Huang Lin

Classifications

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B9/64

  having more than six components · 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

• G02B13/06

  Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces} · CPC title