Optical image capturing system

Patent metadata

Field	Value
Publication number	US-10007085-B2
Application number	US-201514971563-A
Country	US
Kind code	B2
Filing date	Dec 16, 2015
Priority date	Aug 18, 2015
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

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, a maximum height for image formation on the image plane perpendicular to the optical axis in the optical image capturing system is denoted by HOI, 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 on an optical axis 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 ETP 1 , ETP 2 , ETP 3 , ETP 4 , ETP 5 and ETP 6 , a sum of ETP 1 to ETP 6 described above is SETP, thicknesses of the first through sixth lens elements on the optical axis respectively are TP 1 , TP 2 , TP 3 , TP 4 , TP 5 and TP 6 , a sum of TP 1 to TP 6 described above is STP, and the following relations are satisfied: 1.2≤f/HEP≤2 and 0.5≤SETP/STP<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,
wherein contrast transfer rates of modulation transfer with space frequencies of 55 cycles/mm (MTF values) of a visible light at the optical axis on the image plane, 0.3 HOI and 0.7 HOI are respectively denoted by MTFE 0 , MTFE 3 and MTFE 7 , and the following relations are satisfied: MTFE 0 ≥0.2, MTFE 3 ≥0.01 and MTFE 7 ≥0.01,
wherein the thicknesses in parallel with the optical axis of the first through sixth lens elements at height ½ HEP respectively are ETP 1 , ETP 2 , ETP 3 , ETP 4 , ETP 5 and ETP 6 , the sum of ETP 1 to ETP 6 described above is SETP, and the following relation is satisfied: 0.3≤SETP/EIN<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 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: 0.1≤EIR/PIR≤1.1.

4. 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 one inflection point.

5. 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: 0.1≤EBL/BL<1.1.

6. 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, an image sensing device is disposed on the image plane, a distance perpendicular to the optical axis between each inflection point of the sixth lens element and the optical axis is HIF, and the following relations are satisfied: 0.1≤InS/HOS≤1.1 and 0≤HIF/HOI≤0.9.

7. 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 refractive power; and
an image plane;
wherein the optical image capturing system consists of six lens elements with refractive power and at least one of the six lens elements is made of plastic, a maximum height for image formation on the image plane perpendicular to the optical axis in the optical image capturing system is denoted by HOI, at least one of the second through sixth lens elements has positive refractive power, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6respectively, 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 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 ≤2 and 0.2≤EIN/ETL<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 7 , 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 ED 56 , a distance from the fifth lens element to the sixth lens element on the optical axis is IN 56 , and the following relation is satisfied: 0<ED 56 /IN 56 ≤50.

9. The optical image capturing system of claim 7 , 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 ED 12 , a distance from the first lens element to the second lens element on the optical axis is IN 12 , and the following relation is satisfied: 0<ED 12 / IN 12 <15.

10. The optical image capturing system of claim 7 , wherein a thickness in parallel with the optical axis of the second lens element at height ½ HEP is ETP 2 , a thickness of the second lens element on the optical axis is TP 2 , and the following relation is satisfied: 0<ETP 2 /TP 2 ≤3.

11. The optical image capturing system of claim 7 , wherein a thickne

Assignees

• Ability Opto Electronics Technology Co Ltd

Inventors

• Tang Nai-Yuan
• Chang Yeong-Ming

Classifications

• G02B13/0045

  having five or more lenses · CPC title

• G02B9/62 Primary

  having six components only · CPC title