Optical image capturing system

Patent metadata

Field	Value
Publication number	US-9651758-B2
Application number	US-201514721682-A
Country	US
Kind code	B2
Filing date	May 26, 2015
Priority date	Nov 19, 2014
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A five-piece optical lens for capturing image and a five-piece optical module for capturing image, along the optical axis in order from an object side to an image side, include a first lens with refractive power having an object-side surface which can be convex; a second lens with refractive power; a third lens with refractive power; a fourth lens with negative refractive power; and a fifth lens which can have negative refractive power, wherein an image-side surface thereof can be concave, and at least one surface of the fifth lens has an inflection point; both surfaces of each of the five lenses are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.

First claim

What is claimed is:

1. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:
a first lens having positive refractive power;
a second lens having refractive power;
a third lens having refractive power;
a fourth lens having negative refractive power;
a fifth lens having refractive power; and
an image plane;
wherein the optical image capturing system consists of the five lenses with refractive power; at least two of the five lenses each has at least an inflection point on at least a surface thereof; at least one of the lenses from the second lens to the fifth lens has positive refractive power; the fifth lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side, and both the object-side surface and the image-side surface of the fifth lens are aspheric surfaces;
wherein the optical image capturing system satisfies:
1.2≦ f/HEP≦ 3.0; and

0.5≦ HOS/f≦ 3.0;

where f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; and HOS is a distance in parallel with the optical axis from an object-side surface of the first lens to the image plane;
wherein the second lens has negative refractive power, and the fifth lens has negative refractive power.

2. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0 deg< HAF ≦70 deg;

| TDT|< 60%; and
| ODT|< 50%;
where HAF is a half of a view angle of the optical image capturing system; TDT is a TV distortion; and ODT is an optical distortion.

3. The optical image capturing system of claim 1 , wherein the fifth lens has at least an inflection point on at least one of the surfaces thereof.

4. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0 mm< HIF ≦5 mm;

where HIF is a distance perpendicular to the optical axis between any inflection point and the optical axis.

5. The optical image capturing system of claim 4 , wherein the optical image capturing system further satisfies:
0< HIF/InTL≦ 5;
where InTL is a distance in parallel with the optical axis between the object-side surface of the first lens and the image-side surface of the fifth lens.

6. The optical image capturing system of claim 5 , further comprising an aperture and an image sensor on the image plane, wherein the optical image capturing system further satisfies:
0.5≦ InS/HOS≦ 1.1; and

0< HIF/HOI≦ 0.9;
where InS is a distance in parallel with the optical axis between the aperture and the image plane; and HOI is a height for an image formation of the optical image capturing system.

7. The optical image capturing system of claim 4 , wherein the optical image capturing system further satisfies:
0 mm< SGI ≦1 mm;

where SGI is a displacement in parallel with the optical axis from a point on a surface of the lens, through which the optical axis passes, to the inflection point on the surface.

8. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0.6≦ InTL/HOS≦ 0.9;

where InTL is a distance in parallel with the optical axis between the object-side surface of the first lens and the image-side surface of the fifth lens.

9. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:
a first lens having positive refractive power;
a second lens having refractive power;
a third lens having refractive power;
a fourth lens having negative refractive power;
a fifth lens having negative refractive power; and
an image plane;
wherein the optical image capturing system consists of the five lenses with refractive power; at least two of the five lenses each has at least an inflection point on at least a surface thereof; at least one of the lenses from the second lens to the fourth lens has positive refractive power; the fifth lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side, and both the object-side surface and the image-side surface of the fifth lens are aspheric surfaces;
wherein the optical image capturing system satisfies:
1.2≦ f/HEP≦ 3.0;

0.5≦ HOS/f≦ 3.0;

0.4≦|tan( HAF )|≦3.0;

| TDT|< 60%; and
| ODT|≦ 50%;

where f1, f2, f3, f4, and f5 are focal lengths of the first lens to the fifth lens, respectively; f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance in parallel with the optical axis between an object-side surface, which face the object side, of the first lens and the image plane; HAF is a half of a view angle of the optical image capturing system; TDT is a TV distortion; and ODT is an optical distortion;
wherein the optical image capturing system further satisfies:
0< SGI 521/( TP 5+ SGI 521)≦0.8,

where SGI521 is a displacement in parallel with the optical axis from a point on the image-side surface of the fifth lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis, on the image-side surface of the fifth lens; and TP5 is a thickness of the fifth lens on the optical axis.

10. The optical image capturing system of claim 9 , wherein at least one of the surfaces of the fourth lens has at least an inflection point thereon.

11. The optical image capturing system of claim 9 , wherein at least one of the surfaces of the fifth lens has at least one inflection point thereon.

12. The optical image capturing system of claim 9 , wherein the optical image capturing system further satisfies:
0 mm< HOS ≦7 mm.

13. The optical image capturing system of claim 9 , wherein the optical image capturing system further satisfies:
0 mm< InTL≦ 6 mm;
where InTL is a distance in parallel with the optical axis between the object-side surface of the first lens and the image-side surface of the fifth lens.

14. The optical image capturing system of claim 9 , wherein the optical image capturing system further satisfies:
0 mm<Σ TP≦ 5 mm;

where ΣTP is a sum of central thicknesses of the lenses, which have refractive power, on the optical axis.

15. The optical image capturing system of claim 9 , wherein the optical image capturing system further satisfies:
0< IN 12/ f≦ 0.2;
where IN12 is a distance on the optical axis between the first lens and the second lens.

16. The optical image capturing system of claim 9 , wherein the optical image capturing system further satisfies:
0.01≦ f 1/( f 1+ f 3)≦0.9.

17. The optical image capturing system of claim 9 , wherein the optical image capturing system further satisfies:
0<| f/f 1|≦2;

0<| f/f 2|≦2;

0<| f/f 3|≦3;

0<| f/f 4|≦3; and

0<| f/f 5|≦3.

18. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:
a first lens having positive refractive power;
a second lens having refractive power;
a third lens having refractive power;
a fourth lens having negative refractive power;
a fifth lens having negative refractive power, and having at least an inflection point on an image-side surface, which faces the image side, and an object-side surface, which faces the object side, respectively, wherein at least one surface between the image-side surface and the object-side surface thereof has at least an inflection point; and

Assignees

• Ability Opto Electronics Technology Co Ltd

Inventors

• Tang Nai-Yuan
• Chang Yeong-Ming

Classifications

• G02B9/60

  having five components only · CPC title

• G02B13/0045 Primary

  having five or more lenses · 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