Optical image capturing system

Patent metadata

Field	Value
Publication number	US-10139593-B2
Application number	US-201615389884-A
Country	US
Kind code	B2
Filing date	Dec 23, 2016
Priority date	Jul 6, 2016
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The invention discloses a three-piece optical lens for capturing image and a five-piece optical module 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 positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements 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 negative refractive power;
a third lens having positive refractive power; and
an image plane;
wherein the optical image capturing system consists of the three lenses with refractive power; each lens among the first lens to the third lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side;
wherein the optical image capturing system satisfies:
1≤ f/HEP≤ 10;

0 deg< HAF ≤150 deg; and

0.9≤2( ARE/HEP )≤2.0;

where f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance between an object-side surface of the first lens and the image plane on the optical axis; HAF is a half of a maximum view angle of the optical image capturing system; for any surface of any lens, ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis.

2. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
PLTA≤100 μm;

PSTA≤100 μm;

NLTA≤100 μm;

NSTA≤100 μm;

SLTA≤100 μm;

SSTA≤100 μm; and

|TDT|<100%;
where TDT is a TV distortion; HOI is a maximum height for image formation on the image plane; PLTA is a transverse aberration at 0.7 HOI on the image plane in the positive direction of a tangential fan of the optical image capturing system after a longest operation wavelength passing through an edge of the aperture; PSTA is a transverse aberration at 0.7 HOI on the image plane in the positive direction of the tangential fan after a shortest operation wavelength passing through the edge of the aperture; NLTA is a transverse aberration at 0.7 HOI on the image plane in the negative direction of the tangential fan after the longest operation wavelength passing through the edge of the aperture; NSTA is a transverse aberration at 0.7 HOI on the image plane in the negative direction of the tangential fan after the shortest operation wavelength passing through the edge of the aperture; SLTA is a transverse aberration at 0.7 HOI on the image plane of a sagittal fan of the optical image capturing system after the longest operation wavelength passing through the edge of the aperture; SSTA is a transverse aberration at 0.7 HOI on the image plane of a sagittal fan after the shortest operation wavelength passing through the edge of the aperture.

3. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0.9≤ ARS/EHD≤ 2.0;

where, for any surface of any lens, EHD is a maximum effective half diameter thereof, ARS is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to an end point of the maximum effective half diameter thereof.

4. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0 mm<HOS≤50 mm.

5. The optical image capturing system of claim 1 , wherein the image plane is either flat or curved.

6. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0.05≤ ARE 31/ TP 3≤25; and

0.05≤ ARE 32/ TP 3≤25;

where ARE 31 is a profile curve length measured from a start point where the optical axis passes the object-side surface of the third lens, along a surface profile of the object-side surface of the third lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis; ARE 32 is a profile curve length measured from a start point where the optical axis passes the image-side surface of the third lens, along a surface profile of the image-side surface of the third lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis; TP 3 is a thickness of the third lens on the optical axis.

7. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
0.05≤ ARE 21/ TP 2≤25; and

0.05≤ ARE 22/ TP 2≤25;

where ARE21 is a profile curve length measured from a start point where the optical axis passes the object-side surface of the second lens, along a surface profile of the object-side surface of the second lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis; ARE 22 is a profile curve length measured from a start point where the optical axis passes the image-side surface of the second lens, along a surface profile of the image-side surface of the second lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis; TP 2 is a thickness of the second lens on the optical axis.

8. The optical image capturing system of claim 1 , wherein the first lens has negative refractive power.

9. The optical image capturing system of claim 1 , further comprising an aperture, wherein the optical image capturing system further satisfies:
0.2≤ InS/HOS≤ 1.1;

where InS is a distance between the aperture and the image plane on the optical axis.

10. The optical image capturing system of claim 1 , wherein the optical image capturing system further satisfies:
PLTA≤50 μm;

PSTA≤50 μm;

NLTA≤50 μm;

NSTA≤50 μm;

SLTA≤50 μm; and

SSTA≤50 μm;

where HOI is a maximum height for image formation on the image plane; PLTA is a transverse aberration at 0.7 HOI on the image plane in the positive direction of a tangential fan of the optical image capturing system after a longest operation wavelength passing through an edge of the aperture; PSTA is a transverse aberration at 0.7 HOI on the image plane in the positive direction of the tangential fan after a shortest operation wavelength passing through the edge of the aperture; NLTA is a transverse aberration at 0.7 HOI on the image plane in the negative direction of the tangential fan after the longest operation wavelength passing through the edge of the aperture; NSTA is a transverse aberration at 0.7 HOI on the image plane in the negative direction of thetangential fan after the shortest operation wavelength passing through the edge of the aperture; SLTA is a transverse aberration at 0.7 HOI on the image plane of a sagittal fan of the optical image capturing system after the longest operation wavelength passing through the edge of the aperture; SSTA is a transverse aberration at 0.7 HOI on the image plane of a sagittal fan after the shortest operation wavelength passing through the edge of the aperture.

11. 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 positive refractive power;
a third lens having positive refractive power; and
an image plane;
wherein the optical image capturing system consists of the three lenses with refractive power; at least a surface of each of at least one lens among the first lens to the third lens has at least an inflection point; each lens among the first lens to the third lens has an object-side surface, which faces the object side, and

Assignees

• Ability Opto Electronics Technology Co Ltd

Inventors

• Lai Chien-Hsun
• Tang Nai-Yuan
• Chang Yeong-Ming

Classifications

• G02B9/16

  all the components being simple · CPC title

• G02B9/12

  having three components only · CPC title

• G02B13/0035 Primary

  having three 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

• G02B7/04

  with mechanism for focusing or varying magnification · CPC title