Optical image capturing system

Patent metadata

Field	Value
Publication number	US-2016341931-A1
Application number	US-201514857116-A
Country	US
Kind code	A1
Filing date	Sep 17, 2015
Priority date	May 19, 2015
Publication date	Nov 24, 2016
Grant date	—

Abstract

A six-piece optical lens for capturing image and a six-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 refractive power, a second lens with refractive power, a third lens with refractive power, a fourth lens with refractive power, a fifth lens with refractive power and a sixth lens with refractive power. At least one of the image-side surface and object-side surface of each of the six lens elements is 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; a third lens element with refractive power; a fourth lens element with refractive power; a fifth lens element with refractive power; a sixth lens element with refractive power; and an image plane; wherein the optical image capturing system consists of six lens elements with refractive power, at least two lens elements among the first through sixth lens elements respectively have at least one inflection point on at least one surface thereof, at least one of the first through sixth lens elements has positive refractive power, an object-side surface and an image-side surface of the sixth lens element are aspheric, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6 respectively, 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 from an axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, thicknesses in parallel with an optical axis of the first through sixth lens elements at height ½ HEP respectively are ETP1, ETP2, ETP3, ETP4, ETP5 and ETP6, a sum of ETP1 to ETP6 described above is SETP, thicknesses of the first through sixth lens elements on the optical axis respectively are TP1, TP2, TP3, TP4, TP5 and TP6, a sum of TP1 to TP6 described above is STP, and the following relations are satisfied: 1.2≦f/HEP≦6.0, 0.5≦HOS/f≦3 and 0.5≦SETP/STP<1.

2 . The optical image capturing system of claim 1 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at height ½ HEP to the image plane is ETL, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at height ½ HEP to a coordinate point on the image-side surface of the sixth lens element at height ½ HEP is EIN, and the following relation is satisfied: 0.2≦EIN/ETL<1.

3 . The optical image capturing system of claim 2 , wherein the thicknesses in parallel with the optical axis of the first through sixth lens elements at height ½ HEP respectively are ETP1, ETP2, ETP3, ETP4, ETP5 and ETP6, the sum of ETP1 to ETP6 described above is SETP, and the following relation is satisfied: 0.3≦SETP/EIN<1.

4 . The optical image capturing system of claim 1 , wherein the optical image capturing system comprises a light filtration element, the light filtration element is located between the sixth lens element and the image plane, a distance in parallel with the optical axis from a coordinate point on the image-side surface of the sixth lens element at height ½ HEP to the light filtration element is EIR, a distance in parallel with the optical axis from an axial point on the image-side surface of the sixth lens element to the light filtration element is PIR, and the following relation is satisfied: 0.2≦EIR/PIR≦0.8

5 . The optical image capturing system of claim 1 , wherein an object-side surface or an image-side surface of at least one of the six lens elements has at least two inflection points.

6 . The optical image capturing system of claim 1 , wherein the optical image capturing system has a maximum height of image capturing HOI perpendicular to the optical axis on the image plane, contrast transfer rates of modulation transfer with half frequencies (MTF values) at the optical axis on the image plane, 0.3 HOI and 0.7 HOI are respectively denoted by MTFH0, MTFH3 and MTFH7, and the following relations are satisfied: MTFH0≧0.3, MTFH3≧0.2 and MTFH7≧0.1.

7 . The optical image capturing system of claim 1 , wherein a half of maximum view angle of the optical image capturing system is HAF, and the following relation is satisfied: 0.4≦|tan(HAF)|≦3.0.

8 . The optical image capturing system of claim 1 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the sixth lens element at height ½ HEP to the image plane is EBL, a horizontal distance in parallel with the optical axis from an axial point on the image-side surface of the sixth lens element to the image plane is BL, and the following relation is satisfied: 0.2≦EBL/BL<1.

9 . The optical image capturing system of claim 5 , further comprising an aperture stop, a distance from the aperture stop to the image plane on the optical axis is InS, an image sensing device is disposed on the image plane, a half of a diagonal of an effective detection field of the image sensing device is HOI, and the following relations are satisfied: 0.5≦InS/HOS≦1.1 and 0≦HIF/HOI≦0.9.

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; a third lens element with refractive power; a fourth lens element with refractive power; a fifth lens element with refractive power; a sixth lens element with negative refractive power; and an image plane; wherein the optical image capturing system consists of six lens elements with refractive power, at least two lens elements among the six lens elements respectively have at least one inflection point on at least one surface thereof, at least one of the second through fifth lens elements has positive refractive power, an object-side surface and an image-side surface of the sixth lens element are aspheric, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6 respectively, 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 from an axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at height ½ HEP to the image plane is ETL, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at height ½ HEP to a coordinate point on the image-side surface of the sixth lens element at height ½ HEP is EIN, and the following relations are satisfied: 1.2≦f/HEP≦6.0, 0.5≦HOS/f≦3.0, and 0.2≦EIN/ETL<1.

11 . The optical image capturing system of claim 10 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the fifth lens element at height ½ HEP to a coordinate point on the object-side surface of the sixth lens element at height ½ HEP is ED56, a distance from the fifth lens element to the sixth lens element on the optical axis is IN56, and the following relation is satisfied: 0<ED56/IN56≦10.

12 . The optical image capturing system of claim 10 , wherein a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the first lens element at height ½ HEP to a coordinate point on the object-side surface of the second lens element at height ½ HEP is ED12, a distance from the first lens element to the second lens element on the optical axis is IN12, and the following relation is satisfied: 0<ED12/IN12<1.

13 . The optical image capturing system of claim 10 , wherein a thickness in parallel with the optical axis of the second lens element at height ½ HEP is ETP2, a thickness of the second lens element on the optical axis is TP2, and the following relation is satisfied: 0<E

Assignees

• Ability Opto Electronics Technology Co Ltd

Inventors

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

Classifications

• G02B27/0025

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

• G02B9/62

  having six 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