Camera lens assembly

Patent metadata

Field	Value
Publication number	US-10921559-B2
Application number	US-201816224648-A
Country	US
Kind code	B2
Filing date	Dec 18, 2018
Priority date	Sep 13, 2017
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

The present disclosure discloses a camera lens assembly. The camera lens assembly includes, sequentially along an optical axis from an object side to an image side, 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. Each of the second lens and the third lens has a positive refractive power or a negative refractive power. The fourth lens has a positive refractive power, and an image-side surface of the fourth lens is a convex surface. The fifth lens has a negative refractive power, and an object-side surface of the fifth lens is a concave surface. An effective semi-diameter DT52 of an image-side surface of the fifth lens and half of a diagonal length ImgH of an effective pixel area on an image plane of the camera lens assembly satisfy: 0.75<DT52/ImgH<1.

First claim

What is claimed is:

1. A camera lens assembly comprising, sequentially along an optical axis from an object side to an image side, 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;
each of the second lens and the third lens has a positive refractive power or a negative refractive power;
the fourth lens has a positive refractive power, and an image-side surface of the fourth lens is a convex surface;
the fifth lens has a negative refractive power, and an object-side surface of the fifth lens is a concave surface; and
an effective semi-diameter DT52 of an image-side surface of the fifth lens and half of a diagonal length ImgH of an effective pixel area on an image plane of the camera lens assembly satisfy: 0.75<DT52/ImgH<1,
wherein a radius of curvature R8 of the image-side surface of the fourth lens and a radius of curvature R9 of the object-side surface of the fifth lens satisfy: 1.2<R8/R9<3.5; and
wherein an axial distance TTL from the object-side surface of the first lens to an image plane of the camera lens assembly and half of the diagonal length ImgH of the effective pixel area on the image plane of the camera lens assembly satisfy: TTL/ImgH<1.6.

2. The camera lens assembly according to claim 1 , wherein a total effective focal length f of the camera lens assembly and an entrance pupil diameter EPD of the camera lens assembly satisfy: f/EPD<1.6.

3. The camera lens assembly according to claim 1 , wherein an effective focal length f1 of the first lens and a total effective focal length f of the camera lens assembly satisfy: 1.4<f1/f<2.

4. The camera lens assembly according to claim 1 , wherein a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R2 of the image-side surface of the first lens satisfy: −5<(R1+R2)/(R1−R2)<−3.

5. The camera lens assembly according to claim 1 , wherein the radius of curvature R9 of the object-side surface of the fifth lens and a total effective focal length f of the camera lens assembly satisfy: R9/f−0.5.

6. The camera lens assembly according to claim 1 , wherein a center thickness CT1 of the first lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.6<CT1/CT4<1.1.

7. The camera lens assembly according to claim 1 , satisfying 0.8<SAG51/SAG52<1.8,
wherein SAG51 is a distance on the optical axis from an intersection of the object-side surface of the fifth lens and the optical axis to a vertex of an effective semi-diameter of the object-side surface of the fifth lens, and
SAG52 is a distance on the optical axis from an intersection of the image-side surface of the fifth lens and the optical axis to a vertex of the effective semi-diameter of the image-side surface of the fifth lens.

8. The camera lens assembly according to claim 1 , wherein the first lens is a glass lens, and a thermal expansion coefficient TCE1 of the first lens satisfies: TCE1<15×10 −6 /° C.

9. A camera lens assembly comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, the five lenses having refractive powers,
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;
at least one of an object-side surface of the second lens and an image-side surface of the second lens is a convex surface;
at least one of an object-side surface of the third lens and an image-side surface of the third lens is a concave surface;
the fourth lens has a positive refractive power, and an image-side surface of the fourth lens is a convex surface; and
the fifth lens has a negative refractive power, an object-side surface of the fifth lens is a concave surface, and the fifth lens satisfies: 0.8<SAG51/SAG52<1.8,
wherein SAG51 is a distance on the optical axis from an intersection of the object-side surface of the fifth lens and the optical axis to a vertex of an effective semi-diameter of the object-side surface of the fifth lens, and
SAG52 is a distance on the optical axis from an intersection of an image-side surface of the fifth lens and the optical axis to a vertex of an effective semi-diameter of the image-side surface of the fifth lens, and
wherein a radius of curvature R8 of the image-side surface of the fourth lens and a radius of curvature R9 of the object-side surface of the fifth lens satisfy: 1.2<R8/R9<3.5.

10. The camera lens assembly according to claim 9 , wherein an effective focal length f1 of the first lens and a total effective focal length f of the camera lens assembly satisfy: 1.4<f1/f<2.

11. The camera lens assembly according to claim 9 , wherein a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R2 of the image-side surface of the first lens satisfy:
−5<( R 1+ R 2)/( R 1− R 2)<−3.

12. The camera lens assembly according to claim 9 , wherein an axial distance TTL from the object-side surface of the first lens to an image plane of the camera lens assembly and half of a diagonal length ImgH of an effective pixel area on the image plane of the camera lens assembly satisfy: TTL/ImgH<1.6.

13. The camera lens assembly according to claim 9 , wherein a radius of curvature R9 of the object-side surface of the fifth lens and an effective focal length f5 of the fifth lens satisfy: 0<R9/f5<0.8.

14. The camera lens assembly according to claim 9 , wherein a center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 0.8<CT3/CT5<1.2.

15. A camera lens assembly comprising, sequentially along an optical axis from an object side to an image side, 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;
each of the second lens and the third lens has a positive refractive power or a negative refractive power;
the fourth lens has a positive refractive power, and an image-side surface of the fourth lens is a convex surface; and
the fifth lens has a negative refractive power, and an object-side surface of the fifth lens is a concave surface;
wherein a total effective focal length f of the camera lens assembly and an entrance pupil diameter EPD of the camera lens assembly satisfy: f/EPD<1.6;
an axial distance TTL from the object-side surface of the first lens to an image plane of the camera lens assembly and half of a diagonal length ImgH of an effective pixel area on the image plane of the camera lens assembly satisfy: TTL/ImgH<1.6, and
wherein a radius of curvature R8 of the image-side surface of the fourth lens and the radius of curvature R9 of the object-side surface of the fifth lens satisfy: 1.2<R8/R9<3.5.

16. The camera lens assembly according to claim 15 , wherein a spacing distance T12 on the optical axis between the first lens and the second lens, a spacing distance T23 on the optical axis between the second lens and the third lens, and a spacing distance T34 on the optical axis between the third lens and the fourth lens satisfy: 0.1<T34/(T12+T23)<0.5.

17. The camera lens assembly according to claim 15 , wherein the radius of curvature R9 of the object-side surface of the fifth lens

Assignees

• Zhejiang Sunny Optical Co Ltd

Inventors

• Wang Xinquan

Classifications

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B9/60

  having five components only · CPC title