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US 9,753,251 B2Granted
Optical image capturing system
AssigneeAbility Opto-Electronics Technology Co., Ltd.
InventorsYao-Wei Liu, Yeong-Ming Chang
Life of this patent
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Abstract
A three-piece optical lens for capturing image and a three-piece optical module for capturing image, along the optical axis in order from an object side to an image side, include a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.
Claims22
An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:
- a first lens having positive refractive power;
- a second lens having refractive power;
- a third lens having refractive power;
- and
- an image plane;
- wherein the optical image capturing system consists of the three lenses with refractive power;
- at least one of the second lens and the third lens has positive refractive power;
- the third lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side, and both the object-side surface and the image-side surface of the third lens are aspheric surfaces;
- wherein the optical image capturing system satisfies:
- 1.2≦f/HEP≦6.0;
- 1.0≦HOS/f≦2.0;
- and 0<Σ|InRS|/InTL≦3;
- where f1, f2 and f3 are focal lengths of the first lens to the third lens, respectively;
- f is a focal length of the optical image capturing system;
- HEP is an entrance pupil diameter of the optical image capturing system;
- HOS is a distance on the optical axis from an object-side surface of the first lens to the image plane;
- InTL is a distance between the object-side surface of the first lens and the image-side surface of the third lens;
- and Σ|InRS| is of an sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point to the point at the maximum effective semi diameter, i.e. Σ|InRS|=InRSO+InRSI while InRSO is of a sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point on the object-side surface to the point at the maximum effective semi diameter of the object-side surface and InRSI is of a sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point on the image-side surface to the point at the maximum effective semi diameter of the image-side surface;
- wherein the second lens has negative refractive power;
- wherein the optical image capturing system further comprises an image sensor on the image plane, wherein the optical image capturing system further satisfies:
- 0 <HOS/HOI≦1.63;
- where HOI is a half of a diagonal line of an effective sensing area of the image sensor.
19 more elements
An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:
- a first lens having positive refractive power;
- a second lens having refractive power;
- a third lens having refractive power;
- and
- an image plane;
- wherein the optical image capturing system consists of the three lenses with refractive power;
- at least two of the lenses from the first lens to the third lens each has at least an inflection point on at least a surface thereof;
- at least one of the second lens and the third lens has positive refractive power;
- the third lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side, and both the object-side surface and the image-side surface of the third lens are aspheric surfaces;
- wherein the optical image capturing system satisfies:
- 1. 2≦f/HEP≦6.0;
- 1.0≦HOS/f≦2.0;
- and 0<Σ|InRS|/InTL≦3;
- where f1, f2 and f3 are focal lengths of the first lens to the third lens, respectively;
- f is a focal length of the optical image capturing system;
- HEP is an entrance pupil diameter of the optical image capturing system;
- HOS is a distance on the optical axis between an object-side surface, which face the object side, of the first lens and the image plane;
- InTL is a distance between the object-side surface of the first lens and the image-side surface of the third lens;
- and Σ|InRS| is of an sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point to the point at the maximum effective semi diameter, i.e. Σ|InRS|=InRSO+InRSI while InRSO is of a sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point on the object-side surface to the point at the maximum effective semi diameter of the object-side surface and InRSI is of a sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point on the image-side surface to the point at the maximum effective semi diameter of the image-side surface;
- wherein the second lens has negative refractive power.
17 more elements
An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:
- a first lens having positive refractive power, wherein the first lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side, thereof;
- and an area of the image-side surface of the first lens, where is closed to the optical axis, is convex;
- a second lens having negative refractive power;
- a third lens having refractive power, wherein the third lens has at least an inflection point on at least one of an object-side surface, which faces the object side, and an image-side surface, which faces the image side, thereof;
- and
- an image plane;
- wherein the optical image capturing system consists of the three lenses having refractive power;
- at least two of the lenses from the first lens to the second lens each has an at least an inflection point on at least a surface thereof;
- both the object-side surface and the image-side surface of the first lens are aspheric surfaces;
- and both the object-side surface and the image-side surface of the third lens are aspheric surfaces;
- wherein the optical image capturing system satisfies:
- 1.2≦f/HEP≦3.0;
- 0.4≦|tan(HAF)|≦1.0;
- 1.0≦HOS/f≦2.0;
- |TDT|<60%;
- |ODT|≦50%;
- and 0<|InRS|/InTL≦3;
- where f1, f2 and f3 are focal lengths of the first lens to the third lens, respectively;
- f is a focal length of the optical image capturing system;
- HEP is an entrance pupil diameter of the optical image capturing system;
- HAF is a half of a view angle of the optical image capturing system;
- HOS is a distance on the optical axis between an object-side surface, which face the object side, of the first lens and the image plane;
- TDT is a TV distortion;
- ODT is an optical distortion;
- InTL is a distance between the object-side surface of the first lens and the image-side surface of the third lens;
- and Σ|InRS| is of an sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point to the point at the maximum effective semi diameter, i.e. Σ|InRS|=InRSO+InRSI while InRSO is of a sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point on the object-side surface to the point at the maximum effective semi diameter of the object-side surface and InRSI is of a sum of absolute values of the displacements on the optical axis of each lens with refractive power from the central point on the image-side surface to the point at the maximum effective semi diameter of the image-side surface.
23 more elements
Dependencies are inferred from the claim text.