Camera lens assembly

Patent metadata

Field	Value
Publication number	US-2021109326-A1
Application number	US-202017128577-A
Country	US
Kind code	A1
Filing date	Dec 21, 2020
Priority date	Sep 5, 2018
Publication date	Apr 15, 2021
Grant date	—

Abstract

The present disclosure discloses a camera 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. The first lens has negative refractive power; the second lens has positive refractive power; the third lens has negative refractive power; the fourth lens has refractive power; the fifth lens has refractive power; and the sixth lens has negative refractive power. At least one of the first lens to the sixth lens has a non-rotationally symmetrical aspheric surface. An effective focal length fx in an X-axis direction of the camera lens assembly and an effective focal length fy in a Y-axis direction of the camera lens assembly satisfy 0.5<fx/fy<1.5.

First claim

What is claimed is:

1 . A camera lens assembly, sequentially from an object side to an image side along an optical axis, comprising, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens,
wherein, the first lens has negative refractive power; the second lens has positive refractive power; the third lens has negative refractive power; the fourth lens has refractive power; the fifth lens has refractive power; and the sixth lens has negative refractive power; wherein at least one of the first lens to the sixth lens has a non-rotationally symmetric aspheric surface, and wherein 0.5<fx/fy<1.5, where fx is an effective focal length in an X-axis direction of the camera lens assembly, and fy is an effective focal length in a Y-axis direction of the camera lens assembly.

2 . The camera lens assembly according to claim 1 , wherein each of an object-side surface and an image-side surface of the second lens is a convex surface,
the fourth lens has negative refractive power, the fifth lens has positive refractive power, and each of an object-side surface and an image-side surface of the fifth lens is a convex surface.

3 . The camera lens assembly according to claim 1 , wherein 0.5<|1/f5−1/f6|<2.5,
where f5 is an effective focal length of the fifth lens, and f6 is an effective focal length of the sixth lens.

4 . The camera lens assembly according to claim 1 , wherein −0.6<f2/f1<−0.4,
where f1 is an effective focal length of the first lens, and f2 is an effective focal length of the second lens.

5 . The camera lens assembly according to claim 1 , wherein the first lens has a non-rotationally symmetrical aspheric surface.

6 . The camera lens assembly according to claim 1 , wherein 0<R9/R8<1.5,
where R9 is a radius of curvature of an object-side surface of the fifth lens, and R8 is a radius of curvature of an image-side surface of the fourth lens.

7 . The camera lens assembly according to claim 1 , wherein 0.2<CT6/ET6<1,
where CT6 is a center thickness of the sixth lens along the optical axis, and ET6 is an edge thickness of the sixth lens.

8 . The camera lens assembly according to claim 1 , wherein −0.5<SAG51/SAG61<0.5,
where SAG51 is a distance along the optical axis from an intersection of an object-side surface of the fifth lens and the optical axis to a vertex of an effective radius of the object-side surface of the fifth lens, and SAG61 is a distance along the optical axis from an intersection of an object-side surface of the sixth lens and the optical axis to a vertex of an effective radius of the object-side surface of the sixth lens.

9 . The camera lens assembly according to claim 1 , wherein the camera lens assembly further comprises a stop, and SL≥4 mm,
where SL is a distance along the optical axis from the stop to an imaging plane of the camera lens assembly.

10 . The camera lens assembly according to claim 1 , wherein TTL/ImgH<1.8,
where TTL is a distance along the optical axis from a center of an object-side surface of the first lens to an imaging plane of the camera lens assembly, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the camera lens assembly.

11 . The camera lens assembly according to claim 1 , wherein FOV>90°,
where FOV is a full field-of-view of the camera lens assembly.

12 . A camera lens assembly, sequentially from an object side to an image side along an optical axis, comprising, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens,
wherein, the first lens has negative refractive power; the second lens has positive refractive power; the third lens has negative refractive power; the fourth lens has refractive power; the fifth lens has refractive power; and the sixth lens has negative refractive power; wherein at least one of the first lens to the sixth lens has a non-rotationally symmetric aspheric surface, and wherein 0.5<CT3/CT4<1, where CT3 is a center thickness of the third lens along the optical axis, and CT4 is a center thickness of the fourth lens along the optical axis.

13 . The camera lens assembly according to claim 12 , wherein 0.5<fx/fy<1.5,
where fx is an effective focal length in an X-axis direction of the camera lens assembly, and fy is an effective focal length in a Y-axis direction of the camera lens assembly.

14 . The camera lens assembly according to claim 12 , wherein 0.5<|1/f5−1/f6|<2.5,
where f5 is an effective focal length of the fifth lens, and f6 is an effective focal length of the sixth lens.

15 . The camera lens assembly according to claim 12 , wherein −0.6<f2/f1<−0.4,
where f1 is an effective focal length of the first lens, and f2 is an effective focal length of the second lens.

16 . The camera lens assembly according to claim 12 , wherein 0<R9/R8<1.5,
where R9 is a radius of curvature of an object-side surface of the fifth lens, and R8 is a radius of curvature of an image-side surface of the fourth lens.

17 . The camera lens assembly according to claim 12 , wherein 0.2<CT6/ET6<1,
where CT6 is a center thickness of the sixth lens along the optical axis, and ET6 is an edge thickness of the sixth lens.

18 . The camera lens assembly according to claim 12 , wherein −0.5<SAG51/SAG61<0.5,
where SAG51 is a distance along the optical axis from an intersection of an object-side surface of the fifth lens and the optical axis to a vertex of an effective radius of the object-side surface of the fifth lens, and SAG61 is a distance along the optical axis from an intersection of an object-side surface of the sixth lens and the optical axis to a vertex of an effective radius of the object-side surface of the sixth lens.

19 . The camera lens assembly according to claim 12 , wherein TTL/ImgH<1.8,
where TTL is a distance along the optical axis from a center of an object-side surface of the first lens to an imaging plane of the camera lens assembly, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the camera lens assembly.

20 . The camera lens assembly according to claim 12 , wherein FOV>90°,
where FOV is a full field-of-view of the camera lens assembly.

Assignees

• Zhejiang Sunny Optics Co Ltd

Inventors

• Jia Yuanlin
• Xu Wuchao

Classifications

• G02B9/62

  having six components only · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B13/06

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

• G02B27/0025

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