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US 11,768,349 B2Granted
Optical image capturing system
AssigneeAbility Opto-Electronics Technology Co., Ltd.
InventorsYeong-Ming Chang, Chien-Hsun Lai, Yao-Wei Liu
Life of this patent
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Abstract
A four-piece optical image capturing system is disclosed. In order from an object side to an image side, the optical image capturing system along the optical axis includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lenses are aspheric. The optical image capturing system can increase aperture value and improve the imagining quality for use in compact cameras.
Claims23
An optical image capturing system, from an object side to an image side, comprising:
- a first lens with negative refractive power, wherein an object-side surface of the first lens on the optical axis is a concave surface and has at least one inflection point;
- a second lens with positive refractive power;
- a third lens with positive refractive power, wherein an object-side surface of the third lens on the optical axis is a concave surface;
- a fourth lens with negative refractive power;
- and
- an image plane;
- wherein the optical image capturing system comprises the four lenses with refractive power, focal lengths of the first lens through the fourth lens are f1, f2, f3, and f4, respectively, and a focal length of the optical image capturing system is f, the entrance pupil diameter of the optical image capturing system is denoted by HEP, a half maximum angle of view of the optical image capturing system is denoted by HAF, and with a point on any surface of any one of the four lenses which crosses the optical axis defined as a starting point, a length of an outline curve from the starting point to a coordinate point of vertical height with a distance from the optical axis to a half entrance pupil diameter on the surface along an outline of the surface is denoted by ARE, an effective maximum radius of any surface of any one lens among the four lenses is denoted by EHD, and with a point on the any surface of any one lens of the four lenses which crosses the optical axis defined as a first starting point, the maximum effective half diameter position of the surface along the outline of the surface defined as a first final point, a length of outline curve from the first starting point to the first final point is denoted by ARS, and the following conditions are satisfied:
- 1.8≤f/HEP≤2.8;45 deg<HAF≤80 deg;0.9≤2(ARE/HEP)≤2.0;
- and 0.9≤ARS/EHD≤2.0.
6 more elements
An optical image capturing system, from an object side to an image side, comprising:
- a first lens with negative refractive power, wherein an object-side surface of the first lens on the optical axis is a concave surface and has at least one inflection point;
- a second lens with positive refractive power;
- a third lens with positive refractive power, wherein an object-side surface of the third lens on the optical axis is a concave surface and has at least one inflection point;
- a fourth lens negative with refractive power;
- and
- an image plane;
- wherein the optical image capturing system comprises the four lenses with refractive power, focal lengths of the first lens through the fourth lens are f1, f2, f3, and f4, respectively, and a focal length of the optical image capturing system is f, the entrance pupil diameter of the optical image capturing system is denoted by HEP, a half maximum angle of view of the optical image capturing system is denoted by HAF, and with a point on any surface of any one of the four lenses which crosses the optical axis defined as a starting point, a length of an outline curve from the starting point to a coordinate point of vertical height with a distance from the optical axis to a half entrance pupil diameter on the surface along an outline of the surface is denoted by ARE, and the following conditions are satisfied:
- 1.8≤f/HEP≤2.8;45 deg<HAF≤80 deg;
- and 0.9≤2(ARE/HEP)≤2.0.
6 more elements
An optical image capturing system, from an object side to an image side, comprising:
- a first lens with negative refractive power, wherein an object-side surface of the first lens on the optical axis is a concave surface and has at least one inflection point, and an image-side surface of the first lens on the optical axis is a convex surface and has at least one inflection point;
- a second lens with positive refractive power, wherein an object-side surface of the second lens on the optical axis is a concave surface;
- a third lens with positive refractive power, wherein an object-side surface of the third lens on the optical axis is a concave surface and has at least one inflection point;
- a fourth lens with refractive power;
- and
- an image plane;
- wherein the optical image capturing system comprises the four lenses with refractive power, focal lengths of the first lens through the fourth lens are f1, f2, f3, and f4, respectively, and a focal length of the optical image capturing system is f, the entrance pupil diameter of the optical image capturing system is denoted by HEP, a half maximum angle of view of the optical image capturing system is denoted by HAF, and with a point on any surface of any one of the four lenses which crosses the optical axis defined as a starting point, a length of an outline curve from the starting point to a coordinate point of vertical height with a distance from the optical axis to a half entrance pupil diameter on the surface along an outline of the surface is denoted by ARE, and the following conditions are satisfied:
- 1.8≤f/HEP≤2.8;45 deg<HAF≤80 deg;
- and 0.9≤2(ARE/HEP)≤2.0.
6 more elements
Dependencies are inferred from the claim text.