Optical image capturing system

Patent metadata

Field	Value
Publication number	US-9348113-B2
Application number	US-201414540424-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Jun 25, 2014
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

The invention discloses a seven-piece optical lens for capturing image and a seven-piece optical system for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with refractive power having a convex object-side surface; a second lens with refractive power, a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power, a sixth lens with refractive power, and a seventh lens with negative refractive power; and at least one of the image-side surface and object-side surface of each of the seven lens elements is aspheric. The optical lens can increase the aperture value and improve the imagining quality for use in compact cameras.

First claim

What is claimed is:

1. An optical image capturing system, in order from an object side to an image side, comprising:
a first lens element with a refractive power;
a second lens element with a refractive power,
a third lens element with a refractive power;
a fourth lens element with a refractive power;
a fifth lens element with a refractive power;
a sixth lens element with a refractive power; and
a seventh lens element with a refractive power;
wherein at least one of the first through seventh lens elements has a positive refractive power, at least one of the image-side surface and the object-side surface of the first through seventh lens elements is aspheric, focal lengths of the first through seventh lens elements are f1, f2, f3, f4, f5, f6, and f7, respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, and the following relation is satisfied: 0≦|f/f1|≦2 and 1.2≦f/HEP≦2.8.

2. The optical image capturing system of claim 1 , wherein at least one of the first through sixth lens element has a positive refractive power and the seventh has a negative refractive power.

3. The optical image capturing system of claim 1 , wherein on the optical axis, a total central thickness of all lens elements with refractive powers is ΣTP, a distance from the object-side surface of the first lens element to the image-side surface of the seventh lens element is InTL, and the following relation is satisfied: 0.1≦ΣTP/InTL≦0.9.

4. The optical image capturing system of claim 1 , further comprises an image plane, a distance from the object-side surface of the first lens element to the image plane is HOS, and the following relation is satisfied: 0.5≦HOS/f≦2.5.

5. The optical image capturing system of claim 1 , wherein a distance in parallel with an optical axis from a maximum effective diameter position to an axial point on the image-side surface of the seventh lens element is InRS72, a central thickness of the seventh lens element on the optical axis is TP7, and the following relation is satisfied: 0≦InRS72/TP7<10.

6. The optical image capturing system of claim 1 , further comprises an aperture stop and an image plane, wherein on the optical axis, a distance from the aperture stop to the image plane is InS, a distance from the object-side surface of the first lens element to the image plane is HOS, and the following relation is satisfied: 0.5≦InS/HOS≦1.1.

7. The optical image capturing system of claim 1 , wherein the following relation is satisfied: |f2|+|f3|+|f4|+|f5|+|f6|>|f1|+|f7| and |f1|>f7.

8. The optical image capturing system of claim 7 , further comprises an image plane, wherein a distance from the object-side surface of the first lens element to the image-side surface of the seventh lens element is InTL, a distance from the object-side surface of the first lens element to the image plane is HOS, and the following relation is satisfied: 0.1≦InTL/HOS≦0.9.

9. The optical image capturing system of claim 8 , wherein a distance perpendicular to the optical axis between the critical point of the object-side surface of the seventh lens element to the optical axis is HVT71, a distance perpendicular to the optical axis between the critical point of the image-side surface of the seventh lens element to the optical axis is HVT72, and the following relation is satisfied: 0≦HVT71/HVT72≦1.5 and 0≦HVT72/HOS≦0.5.

10. An optical image capturing system, in order from an object side to an image side, comprising:
a first lens element with a refractive power;
a second lens element with a refractive power;
a third lens element with a refractive power;
a fourth lens element with a refractive power;
a fifth lens element with a refractive power;
a sixth lens element with a refractive power; and
a seventh lens element with a negative refractive power;
wherein at least one of the first through sixth lens element has a positive refractive power, at least one of the image-side surface and the object-side surface of the first through sixth lens elements is aspheric, focal lengths of the first through seventh lens elements are f1, f2, f3, f4, f5, f6, and f7, respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, TV distortion for image formation in the optical image capturing system is TDT, and the following relation is satisfied: 0≦|f/f1|≦2, 1.2≦f/HEP≦2.8, and |TDT|<1.5%.

11. The optical image capturing system of claim 10 , wherein optical distortion for image formation in the optical image capturing system is ODT and the following relation is satisfied: |ODT|≦2.5%.

12. The optical image capturing system of claim 10 , wherein the following relation is satisfied: |f2|+|f3|+|f4|+|f5|+|f6|>|f1|+|f7| and |f1|>f7.

13. The optical image capturing system of claim 10 , wherein a distance in parallel with an optical axis from a maximum effective diameter position to an axial point on the image-side surface of the seventh lens element is InRS72, a central thickness of the seventh lens element on the optical axis is TP7, and the following relation is satisfied: 0≦InRS72/TP7<10.

14. The optical image capturing system of claim 10 , wherein half of the view angle of the optical image capturing system is HAF and the following relation is satisfied: 0.4≦|tan(HAF)|≦1.5.

15. The optical image capturing system of claim 10 , further comprises an aperture stop and an image plane, wherein on the optical axis, a distance from the aperture stop to the image plane is InS, a distance from the object-side surface of the first lens element to the image plane is HOS, and the following relation is satisfied: 0.5≦InS/HOS≦1.1.

16. The optical image capturing system of claim 15 , further comprising an image sensing device disposed on the image plane, wherein half of a diagonal of an effective detection field of the image sensing device is HOI, a distance from the object-side surface of the first lens element to the image-side surface of the seventh lens element is InTL, a distance from the image-side surface of the seventh lens element to the image plane is BFL, and the following relation is satisfied: 0.5≦(InTL/HOI)+(BFL/HOI)≦7.

17. The optical image capturing system of claim 10 , further comprises an image plane, a distance from the object-side surface of the first lens element to the image-side surface of the seventh lens element is InTL, a distance from the object-side surface of the first lens element to the image plane is HOS, a total central thickness of all lens elements with refractive powers is ΣTP, and the following relation is satisfied: 0.5≦InTL/HOS≦0.95 and 0.1≦ΣTP/InTL≦0.9.

18. The optical image capturing system of claim 17 , wherein a distance from the object-side surface of the first lens element to the image plane is HOS, and the following relation is satisfied: 0.5≦HOS/f≦2.5.

19. The optical image capturing system of claim 18 , wherein a distance perpendicular to the optical axis between the critical point of the object-side surface of the seventh lens element to the optical axis is HVT71, a distance perpendicular to the optical axis between the critical point of the image-side surface of the seventh lens element to the optical axis is HVT72, and the following relation is satisfied: 0≦HVT71/HVT72≦1.5 and 0≦HVT72/HOS≦0.5.

20. An optical image capturing system, in order from an object side to an image side, comprising:
a first lens element with a positive refractive power;
a second lens element

Assignees

• Ability Opto Electronics Technology Co Ltd

Inventors

• Tang Nai-Yuan
• Chang Yeong-Ming

Classifications

• G02B9/64

  having more than six components · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title