Optical image capturing system

Patent metadata

Field	Value
Publication number	US-9645354-B2
Application number	US-201514973168-A
Country	US
Kind code	B2
Filing date	Dec 17, 2015
Priority date	Sep 25, 2015
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A two-piece optical lens for capturing image and a two-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with positive refractive power; and a second lens with refractive power; and at least one of the image-side surface and object-side surface of each of the two lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

First claim

What is claimed is:

1. An optical image capturing system, from an object side to an image side, comprising: a first lens element with refractive power;
a second lens element with refractive power; and an image plane;
wherein the optical image capturing system consists of two lens elements with refractive power,
at least one of the two lens elements has positive refractive power, focal lengths of the two lens elements are f1 and f2, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance on an optical axis from an object-side surface of the first lens element to the image plane is HOS, a distance from the object-side surface of the first lens element to the image-side surface of the second lens element on an optical axis is InTL, a length of outline curve from an axial point on any surface of any one of the two lens elements to a coordinate point of vertical height with a distance of a half of the entrance pupil diameter from the optical axis on the surface along an outline of the surface is denoted as ARE; the following relations are satisfied: 1.2≦f/HEP≦10.0, 0.5≦HOS/f≦3.0, 0<InTL/HOS<0.9, and 1≦2(ARE/HEP)≦1.5.

2. The optical image capturing system of claim 1 , wherein TV distortion for image formation in the optical image capturing system is TDT, a half of a diagonal of an effective detection field of the image sensing device is denoted by HOI, a lateral aberration of the longest operation wavelength of a positive direction tangential fan of the optical image capturing system passing through an edge of the entrance pupil and incident on the image plane by 0.7 HOI is denoted as PLTA, and a lateral aberration of the shortest operation wavelength of the positive direction tangential fan of the optical image capturing system passing through the edge of the entrance pupil and incident on the image plane by 0.7 HOI is denoted as PSTA, a lateral aberration of the longest operation wavelength of a negative direction tangential fan of the optical image capturing system passing through the edge of the entrance pupil and incident on the image plane by 0.7 HOI is denoted as NLTA, a lateral aberration of the shortest operation wavelength of a negative direction tangential fan of the optical image capturing system passing through the edge of the entrance pupil and incident on the image plane by 0.7 HOI is denoted as NSTA, a lateral aberration of the longest operation wavelength of a sagittal fan of the optical image capturing system passing through the edge of the entrance pupil and incident on the image plane by 0.7 HOI is denoted as SLTA, a lateral aberration of the shortest operation wavelength of the sagittal fan of the optical image capturing system passing through the edge of the entrance pupil and incident on the image plane by 0.7 HOI is denoted as SSTA; the following relations are satisfied: PLTA≦600 μm; PSTA≦600 μm; NLTA≦600 μm; NSTA≦600 μm; SLTA≦600 μm; and SSTA≦600 μm; |TDT|<60%.

3. The optical image capturing system of claim 1 , wherein a maximum effective half diameter position of any surface of any one of the two lens elements is denoted as EHD, and a length of outline curve from an axial point on any surface of any one of the two lens elements to the maximum effective half diameter position of the surface along the outline of the surface is denoted as ARS; the following relation is satisfied: 1≦ARS/EHD≦1.5.

4. The optical image capturing system of claim 1 , wherein the following relation is satisfied: 0 mm<HOS≦50 mm.

5. The optical image capturing system of claim 1 , wherein a half of a maximum view angle of the optical image capturing system is HAF, and the following relation is satisfied: 0 deg<HAF≦70 deg.

6. The optical image capturing system of claim 1 , wherein a length of outline curve from an axial point on the object-side surface of the second lens element to a coordinate point of vertical height with a distance of a half of the entrance pupil diameter from the optical axis on the surface along an outline of the surface is denoted as ARE21; a length of outline curve from an axial point on the image-side surface of the second lens element to the coordinate point of vertical height with the distance of a half of the entrance pupil diameter from the optical axis on the surface along the outline of the surface is denoted as ARE22, and a thickness of the second lens element on the optical axis is TP2; the following relations are satisfied: 0.5≦ARE21/TP2≦4000 and 0.5≦ARE22/TP2≦4000.

7. The optical image capturing system of claim 1 , wherein a length of outline curve from an axial point on the object-side surface of the first lens element to a coordinate point of vertical height with a distance of a half of the entrance pupil diameter from the optical axis on the surface along an outline of the surface is denoted as ARE11; a length of outline curve from an axial point on the image-side surface of the first lens element to the coordinate point of vertical height with the distance of a half of the entrance pupil diameter from the optical axis on the surface along the outline of the surface is denoted as ARE12, and a thickness of the first lens element on the optical axis is TP1; the following relations are satisfied: 0.5≦ARE11/TP1≦400 and 0.5≦ARE12/TP1≦400.

8. The optical image capturing system of claim 1 , wherein the second lens element has a positive refractive power.

9. The optical image capturing system of claim 1 , further comprising an aperture stop, a distance from the aperture stop to the image plane on the optical axis is InS, and the following relation is satisfied: 0.5≦InS/HOS≦1.5.

10. An optical image capturing system, from an object side to an image side, comprising: a first lens element with positive refractive power;
a second lens element with refractive power; and an image plane;
wherein the optical image capturing system consists of two lens elements with refractive power, two lens elements respectively has at least one inflection point on at least one surface thereof, focal lengths of the two lens elements are f1 and f2, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance on an optical axis from an object-side surface of the first lens element to the image plane is HOS, a distance from the object-side surface of the first lens element to the image-side surface of the second lens element on an optical axis is InTL, a length of outline curve from an axial point on any surface of any one of the two lens elements to a coordinate point of vertical height with a distance of a half of the entrance pupil diameter from the optical axis on the surface along an outline of the surface is denoted as ARE; the following relations are satisfied: 1.2≦f/HEP≦10.0, 0.5≦HOS/f≦3.0, 0<InTL/HOS<0.9, and 1≦2(ARE/HEP)≦1.5.

11. The optical image capturing system of claim 10 , wherein a maximum effective half diameter position of any surface of any one of the two lens elements is denoted as EHD, and a length of outline curve from an axial point on any surface of any one of the two lens elements to the maximum effective half diameter position of the surface along the outline of the surface is denoted as ARS; the following relation is satisfied: 1≦ARS/EHD≦1.5.

12. The optical image capturing system of claim 10 , wherein the second lens element has a positive refractive power.

13. The optical image capturing system of claim 10 , wherein a height for image formation on the image plane perpendicular to the optical axis in the optical image capturing system is denoted by HOI, a lateral aberration of the longest op

Assignees

• Ability Opto Electronics Technology Co Ltd
• Ability Opto Electronics Technology Co Ltd

Inventors

• Liao Po-Jui
• Lee Hung-Wen

Classifications

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · 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

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title

• G02B13/003 Primary

  having two lenses · CPC title