Optical camera system

Patent metadata

Field	Value
Publication number	US-12111448-B2
Application number	US-202117318260-A
Country	US
Kind code	B2
Filing date	May 12, 2021
Priority date	May 26, 2020
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

An optical camera system is provided, including, in order 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, a seventh lens, an eighth lens and a ninth lens having refractive powers. The first lens has a convex object side surface; the fifth lens and the ninth lens have negative refractive powers; and a distance TTL from an object side surface of the first lens to an imaging plane of the optical camera system on the optical axis and a half ImgH of a diagonal length of an effective pixel region of the optical camera system satisfy: TTL/ImgH<1.5.

First claim

The invention claimed is:

1. An optical camera system, comprising, in order 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, a seventh lens, an eighth lens and a ninth lens all having refractive power,
wherein the first lens has a convex object side surface;
wherein the first lens, fourth lens, and the eighth lens all have positive refractive power, and the third lens, the fifth lens, and the ninth lens all have negative refractive power; and
a distance TTL from an object side surface of the first lens to an imaging plane of the optical camera system on the optical axis and a half ImgH of a diagonal length of an effective pixel region of the optical camera system satisfy: TTL/ImgH<1.5;
wherein an effective half aperture DT11 of the object side surface of the first lens and the half ImgH of the diagonal length of the effective pixel region of the optical camera system satisfy: DT11/ImgH<0.5.

2. The optical camera system according to claim 1 , wherein the maximum field of view FOV of the optical camera system and a total effective focal length f of the optical camera system satisfy: tan (FOV/2)×f>5 mm.

3. The optical camera system according to claim 1 , wherein an effective focal length f3 of the third lens and an effective focal length f4 of the fourth lens satisfy: 0<(f3+f4)/(f3−f4)<0.5.

4. An optical camera system, comprising, in order 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, a seventh lens, an eighth lens and a ninth lens all having refractive power,
wherein the first lens has a convex object side surface;
wherein the first lens, fourth lens, and the eighth lens all have positive refractive power, and the third lens, the fifth lens, and the ninth lens all have negative refractive power; and
a distance TTL from an object side surface of the first lens to an imaging plane of the optical camera system on the optical axis and a half ImgH of a diagonal length of an effective pixel region of the optical camera system satisfy: TTL/ImgH<1.5;
wherein an effective focal length f1 of the first lens and a total effective focal length f of the optical camera system satisfy: 0.7<f1/f≤1.

5. The optical camera system according to claim 1 , wherein an effective focal length f8 of the eighth lens and an effective focal length f9 of the ninth lens satisfy: −3<f8/f9<−2.

6. The optical camera system according to claim 1 , wherein an effective focal length f5 of the fifth lens and a total effective focal length f of the optical camera system satisfy: −4<f5/f<0.

7. The optical camera system according to claim 1 , wherein a radius of curvature R13 of an object side surface of the seventh lens and a radius of curvature R14 of an image side surface of the seventh lens satisfy: |(R13−R14)/(R13+R14)|<0.5.

8. The optical camera system according to claim 1 , wherein an edge thickness ET2 of the second lens, an edge thickness ET3 of the third lens, a center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 1<(ET2+ET3)/(CT2+CT3)<1.5.

9. The optical camera system according to claim 1 , wherein a center thickness CT7 of the seventh lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.8<2×CT7/(CT5+CT6)<1.2.

10. The optical camera system according to claim 1 , wherein a separation distance SAG42 from an intersection point of an image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens on the optical axis, and a separation distance SAG52 from an intersection point of an image side surface of the fifth lens and the optical axis to an effective radius vertex of the image side surface of the fifth lens on the optical axis satisfy: 0.6<SAG42/SAG52<1.

11. The optical camera system according to claim 1 , wherein a combined focal length f23 of the second lens and the third lens and a total effective focal length f of the optical camera system satisfy: −3<f23/f<0.

12. The optical camera system according to claim 1 , wherein a radius of curvature R8 of an image side surface of the fourth lens and an effective focal length f4 of the fourth lens satisfy: −1<R8/f4<0.

13. The optical camera system according to claim 1 , wherein a center thickness CT8 of the eighth lens on the optical axis, and a separation distance T89 between the eighth lens and the ninth lens on the optical axis satisfy: 0.5<CT8/T89<1.

14. The optical camera system according to claim 1 , wherein the maximum effective radius DT32 of an image side surface of the third lens and the maximum effective radius DT42 of an image side surface of the fourth lens satisfy: 0.5<DT32/ DT42<1.

15. The optical camera system according to claim 1 , wherein a distance Tr7r14 from an object side surface of the fourth lens to an image side surface of the seventh lens on the optical axis, and the distance TTL from the object side surface of the first lens to the imaging plane of the optical camera system on the optical axis satisfy: 0<Tr7r14/TTL<0.4.

16. The optical camera system according to claim 1 , wherein a center thickness CT6 of the sixth lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis satisfy: 0.8<CT6/CT7<1.2.

17. The optical camera system according to claim 1 , wherein the optical camera system further comprises a diaphragm provided between the object side and the fourth lens, and
a distance SL from the diaphragm to the imaging plane of the optical camera system on the optical axis and the distance TTL from the object side surface of the first lens to the imaging plane of the optical camera system on the optical axis satisfy: 0.7<SL/TTL<1.

18. An optical camera system, comprising, in order 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, a seventh lens, an eighth lens and a ninth lens all having refractive power,
wherein the first lens has a convex object side surface;
wherein the first lens, fourth lens, and the eighth lens all have positive refractive power, and the third lens, the fifth lens, and the ninth lens all have negative refractive power; and
an effective half aperture DT11 of an object side surface of the first lens and a half ImgH of a diagonal length of an effective pixel region of the optical camera system satisfy: DT11/ImgH<0.5.

Assignees

• Zhejiang Sunny Optics Co Ltd

Inventors

• Huang Wenbo
• He Lingbo
• Dai Fujian
• Zhao Liefeng

Classifications

• G02B9/64

  having more than six components · CPC title

• G02B27/0012

  Optical design, e.g. procedures, algorithms, optimisation routines · 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