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US 9,958,642 B2Granted
Optical image capturing system
AssigneeAbility Opto-Electronics Technology Co., Ltd.
InventorsChien-Hsun Lai, Kuo-Yu Liao, Yao-Wei Liu, Yeong-Ming Chang
Life of this patent
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Abstract
An optical image capturing system is provided. In the order from an object side to an image side, the optical image capturing system 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 is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.
Claims25
An optical image capturing system, from an object side to an image side, comprising:
- a first lens element with refractive power, both of the object-side surface and the image-side surface of the first lens element are convex surface on the optical axis;
- a second lens element with refractive power;
- a third lens element with refractive power;
- a fourth lens element with refractive power;
- and an image plane,
- the optical image capturing system comprises four lens elements with refractive powers;
- at least one lens element among the first to the fourth lens elements has positive refractive power;
- focal lengths of the first through 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, and a distance on the optical axis from the 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 angle of view of the optical image capturing system is HAF;
- thicknesses paralleling the optical axis, of the first lens element, of the second lens element, of the third lens element and of the fourth lens element at height of ½ HEP respectively are ETP1, ETP2, ETP3 and ETP4;
- a sum of the ETP1 to the ETP4 is SETP, thicknesses of the first lens element, the second lens element, the third lens element and the fourth lens element on the optical axis respectively are TP1, TP2, TP3 and TP4;
- a sum of the TP1 to the TP4 is STP, and the following conditions are satisfied:
- 1.0≤f/HEP≤10;
- 0 deg<HAF≤150 deg and 0.5≤SETP/STP<1.
13 more elements
An optical image capturing system, from an object side to an image side, comprising:
- a first lens element with refractive power, an object-side surface and an image-side surface of the first lens element on the optical axis are both convex surface;
- a second lens element with refractive power, an image-side surface of the second lens element on the optical axis is convex surface;
- a third lens element with refractive power, an image-side surface of the third lens element on the optical axis is convex surface;
- a fourth lens element with refractive power;
- and
- an image plane;
- the optical image capturing system comprises four lens elements with refractive powers;
- at least one lens element among the second to the fourth lens elements has positive refractive power;
- focal lengths of the first through 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, and a distance on the optical axis from the 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 angle of view of the optical image capturing system is HAF;
- a horizontal distance paralleling the optical axis from a coordinate point on the object-side surface of the first lens element at height of ½ HEP to the image plane is ETL;
- a horizontal distance paralleling the optical axis from the coordinate point on the object-side surface of the first lens element at height of ½ HEP to a coordinate point on the image-side surface of the fourth lens element at height of ½ HEP is EIN;
- and condition as follows is satisfied:
- 1.0≤f/HEP≤10.0, 0 deg<HAF≤150 deg and 0.2≤EIN/ETL<1.
13 more elements
An optical image capturing system, from an object side to an image side, comprising:
- a first lens element with refractive power, an object-side surface and an image-side surface of the first lens element on the optical axis are both convex surface;
- a second lens element with refractive power, an image-side surface of the second lens element on the optical axis is convex surface;
- a third lens element with refractive power, an image-side surface of the third lens element on the optical axis is convex surface, and an object-side of the third lens element has at least two inflection points;
- a fourth lens element with refractive power;
- and
- an image plane,
- the optical image capturing system comprises four lens elements with refractive powers;
- focal lengths of the first through 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, and a distance on the optical axis from the 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 angle of view of the optical image capturing system is HAF;
- a horizontal distance paralleling the optical axis from a coordinate point on the object-side surface of the first lens element at height of ½ HEP to the image plane is ETL;
- a horizontal distance paralleling the optical axis from the coordinate point on the object-side surface of the first lens element at height of ½ HEP to a coordinate point on the image-side surface of the fourth lens element at height of ½ HEP is EIN;
- and condition as follows is satisfied:
- 1.0≤f/HEP≤10.0, 0 deg<HAF≤100 deg and 0.2≤EIN/ETL<1.
12 more elements
Dependencies are inferred from the claim text.