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US 10,502,929 B2Granted
Optical image capturing system
AssigneeAbility Opto-Electronics Technology Co., Ltd.
InventorsChien-Hsun Lai, Nai-Yuan Tang, Yeong-Ming Chang
Life of this patent
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Abstract
A four-piece optical lens for capturing image and a five-piece optical module for capturing image are provided. In the order from an object side to an image side, the optical lens 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 lens elements are aspheric. The optical lens 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 element with negative refractive power;
- a second lens element with negative refractive power;
- a third lens element with positive refractive power;
- a fourth lens element with positive refractive power;
- and
- an image plane;
- wherein the second lens element has a convex object-side surface and a planar image-side surface;
- the third lens element has a convex object-side surface and a convex image-side surface;
- focal lengths of the four lens elements are respectively f1, f2, f3 and f4;
- a focal length of the optical image capturing system is f, and 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 on the optical axis from the object-side surface of the first lens element to an image-side surface of the fourth lens element is InTL, half of a maximum viewable angle of the optical image capturing system is denoted by HAF;
- an outline curve starting from an axial point on any surface of any one of the four lens elements, tracing along an outline of the surface, and ending at a coordinate point on the surface that has a vertical height of ½ entrance pupil diameter from the optical axis, has a length denoted by ARE;
- conditions as follows are satisfied:
- 1<=f/HEP<=10,
- 49.9997 deg <HAF<=80.0013 deg, and
- 0.9<=2(ARE/HEP)<=2.0.
13 more elements
An optical image capturing system, from an object side to an image side, comprising:
- a first lens element with negative refractive power;
- a second lens element with negative refractive power;
- a third lens element with positive refractive power;
- a fourth lens element with positive refractive power;
- and
- an image plane;
- wherein the second lens element has a convex object-side surface and a planar image-side surface;
- the third lens element has a convex object-side surface and a convex image-side surface;
- at least one of the four lens elements has at least one inflection point on at least one surface thereof;
- focal lengths of the four lens elements are respectively f1, f2, f3 and f4;
- 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 on the optical axis from the object-side surface of the first lens element to an image-side surface of the fourth lens element is InTL, half of a maximum viewable angle of the optical image capturing system is denoted by HAF;
- an outline curve starting from an axial point on any surface of any one of the four lens elements, tracing along an outline of the surface, and ending at a coordinate point on the surface that has a vertical height of ½ entrance pupil diameter from the optical axis, has a length denoted by ARE;
- conditions as follows are satisfied:
- 1<=f/HEP<=10,
- 49.9997 deg <HAF<=80.0013 deg, and
- 0.9<=2(ARE/HEP)<=2.0.
15 more elements
An optical image capturing system, from an object side to an image side, comprising:
- a first lens element with negative refractive power;
- a second lens element with negative refractive power;
- a third lens element with positive refractive power;
- a fourth lens element with positive refractive power;
- at least one of an object-side surface and an image-side surface thereof having at least one inflection point;
- and
- an image plane;
- wherein the second lens element has a convex object-side surface and a planar image-side surface;
- the third lens element has a convex object-side surface and a convex image-side surface;
- at least one lens element among the first lens elements to the third lens element has at least one inflection point on at least one surface thereof;
- focal lengths of the first lens element to the fourth lens elements are respectively f1, f2, f3 and f4;
- 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 on the optical axis from the object-side surface of the first lens element to the image-side surface of the fourth lens element is InTL, half of a maximum viewable angle of the optical image capturing system is denoted by HAF;
- an outline curve starting from an axial point on any surface of any one of the four lens elements, tracing along an outline of the surface, and ending at a coordinate point on the surface that has a vertical height of ½ entrance pupil diameter from the optical axis, has a length denoted by ARE;
- conditions as follows are satisfied:
- 1<=f/HEP<=10,
- 49.9997 deg <HAF<=80.0013 deg, and
- 0.9<=2(ARE/HEP)<=2.0.
16 more elements
Dependencies are inferred from the claim text.