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US 10,120,168 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 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 imaging 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;
- 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;
- wherein the optical image capturing system consists of four lens elements with refractive power, at least one of the four lens elements has positive refractive power;
- 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 third lens element is InTL, half of a maximum viewable angle of the optical image capturing system is denoted by HAF;
- thicknesses of the first to fourth lens elements at height of ½ HEP paralleling the optical axis are respectively ETP1, ETP2, ETP3 and ETP4;
- a sum of ETP1 to ETP4 described above is SETP;
- central thicknesses of the first to fourth lens elements on the optical axis are respectively TP1, TP2, TP3 and TP4;
- a sum of TP1 to TP4 described above is STP;
- conditions as follows are satisfied:
- 1.0≤f/HEP≤10.0, 0 deg<HAF≤50 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 positive refractive power, the first lens element having a convex object-side surface and a concave image-side surface on an 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;
- wherein the optical image capturing system consists of four lens elements with refractive power, at least one of the four lens elements has at least one inflection point on at least one surface thereof;
- at least one of the second lens element to fourth lens element has positive refractive power;
- 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 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 third lens element is InTL, half of a maximum viewable angle of the optical image capturing system is denoted by 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 conditions as follows are satisfied:
- 1.0≤f/HEP≤10.0, 0 deg<HAF≤50 deg and 0.2≤EIN/ETL<1.
12 more elements
An optical image capturing system, from an object side to an image side, comprising:
- a first lens element with positive refractive power, the first lens element having a convex object-side surface and a concave image-side surface on an 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;
- wherein the optical image capturing system consists of four lens elements with refractive power, at least two lens elements among the first lens elements to the fourth 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 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 third lens element is InTL, half of a maximum viewable angle of the optical image capturing system is denoted by HAF;
- a maximum image height of the optical image capturing system on the image plane perpendicular to the optical axis is denoted by HOI, 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 conditions as follows are satisfied:
- 1.0≤f/HEP≤10.0, 10 deg≤HAF≤50 deg, 1≤HOS/HOI≤5, and 0.2≤EIN/ETL<1.
12 more elements
Dependencies are inferred from the claim text.