Optical image capturing system

Patent metadata

Field	Value
Publication number	US-9835830-B2
Application number	US-201615074769-A
Country	US
Kind code	B2
Filing date	Mar 18, 2016
Priority date	Jul 9, 2015
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. At least one lens among the first to the fifth lenses has positive refractive force. The fifth lens can have negative refractive force, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the fifth lenses. The optical image capturing system 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 negative refractive power;
a second lens having refractive power;
a third lens having refractive power;
a fourth lens having 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 one lens among the first to the fifth lenses has positive refractive power; each lens of the first to the fifth lenses 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 at least one lens among the first to the fifth lenses are aspheric surfaces;
wherein the optical image capturing system satisfies:
1.2 ≦f/HEP≦ 6.0;
and
0.5 ≦SETP/STP< 1;

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 the object-side surface of the first lens and the image plane; ETP1, ETP2, ETP3, ETP4, and ETP5 are respectively a thickness at a height of ½ HEP from the optical axis of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens; SETP is a sum of the aforementioned ETP1 to ETP5; TP1, TP2, TP3, TP4, and TP5 are respectively a thickness of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens on the optical axis; STP is a sum of the aforementioned TP1 to TP5;
wherein the optical image capturing system further satisfies:
1≦|tan( HAF )|≦6.0;

where HAF is a half of a view angle of the optical image capturing system;
wherein every lens from the first lens to the fifth lens is made of plastic.

2. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0.2 ≦EIN/ETL< 1;
where ETL is a distance in parallel with the optical axis between a coordinate point at a height of ½ HEP from the optical axis on the object-side surface of the first lens and the image plane; EIN is a distance in parallel with the optical axis between the coordinate point at the height of ½ from the optical axis on the object-side surface of the first lens and a coordinate point at a height of ½ HEP from the optical axis on the image-side surface of the fifth lens.

3. The optical image capturing system of claim 2 , wherein the optical image capturing system further satisfies:
0.2 ≦SETP/EIN< 1.

4. The optical image capturing system of claim 1 , further comprising a filtering component provided between the fifth lens and the image plane, wherein the optical image capturing system further satisfies:
0.1 ≦EIR/PIR< 1;
where EIR is a horizontal distance in parallel with the optical axis between the coordinate point at the height of ½ HEP from the optical axis on the image-side surface of the fifth lens and the filtering component; PIR is a horizontal distance in parallel with the optical axis between a point on the image-side surface of the fifth lens where the optical axis passes through and the filtering component.

5. The optical image capturing system of claim 1 , wherein at least one lens among the first to the fifth lenses has at least one inflection point on at least one surface thereof.

6. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
MTFQ0≦0.2;

MTFQ3≦0.01;

and
MTFQ7≦0.01;

where HOI is a height for image formation perpendicular to the optical axis on the image plane; MTFQ0, MTFQ3, and MTFQ7 are respectively a value of modulation transfer function in a spatial frequency of 55 cycles/mm at the optical axis, 0.3 HOI, and 0.7 HOI on an image plane.

7. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0.2≦ EBL/BL≦ 1;

where EBL is a horizontal distance in parallel with the optical axis between a coordinate point at the height of ½ HEP from the optical axis on the image-side surface of the fifth lens and image surface; BL is a horizontal distance in parallel with the optical axis between the point on the image-side surface of the fifth lens where the optical axis passes through and the image plane.

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

and
0≦ HIF/HOI 0.9;

where HOI is a half of a diagonal of an effective sensing area of the image sensor; InS is a distance in parallel with the optical axis between the aperture and the image plane; and HIF is a distance perpendicular to the optical axis between any of the at least one inflection point and the optical axis.

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 negative refractive power;
a second lens having refractive power;
a third lens having refractive power;
a fourth lens having 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 a surface of at least one lens among the first to the fifth lenses has at least an inflection point; at least one lens among the second to the fifth lenses has positive refractive power; each lens among the first to the fifth lenses 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 at least one lens among the first to the fifth lenses are aspheric surfaces;
wherein the optical image capturing system satisfies:
1.2≦ f/HEP≦ 6.0;

and
0.2≦ EIN/ETL< 1;

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 the object-side surface of the first lens and the image plane; ETL is a distance in parallel with the optical axis between a coordinate point at a height of ½ HEP from the optical axis on the object-side surface of the first lens and the image plane; EIN is a distance in parallel with the optical axis between the coordinate point at the height of ½ HEP from the optical axis on the object-side surface of the first lens and a coordinate point at a height of ½ HEP from the optical axis on the image-side surface of the fifth lens;
wherein the optical image capturing system further satisfies:
1≦|tan( HAF )|6.0;

where HAF is a half of a view angle of the optical image capturing system;
wherein every lens from the first lens to the fifth lens is made of plastic.

10. The optical image capturing system of claim 9 , wherein the optical image capturing system further satisfies:
0< ED 45/ IN 45≦50;

where ED45 is a horizontal distance between the fourth lens and the fifth lens at the height of ½ HEP from the optical axis; IN45 is a horizontal distance between the fourth lens and the fifth lens on the optical axis.

11. The optical image capturing system of claim 9 , wherein the optical image capturing system further satisfies:
0< ED 12 /IN 12≦10;

where ED12 is a horizontal d

Assignees

• Ability Opto Electronics Technology Co Ltd

Inventors

• Liu yao-wei
• Tang Nai-Yuan
• Chang Yeong-Ming

Classifications

• G02B9/60

  having five components only · 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

• G02B3/04

  with continuous faces that are rotationally symmetrical but deviate from a true sphere {, e.g. so called "aspheric" lenses} · CPC title

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B27/646

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title