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US 9,958,644 B2Granted
Optical image capturing system
AssigneeAbility Opto-Electronics Technology Co., Ltd.
InventorsYao-Wei Liu, Nai-Yuan Tang, Yeong-Ming Chang
Life of this patent
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Abstract
An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, wherein at least one lens among the first to the fifth lenses has positive refractive force and the fifth lens can have negative refractive force, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point, and wherein the lenses in the optical image capturing system which have refractive power include the first to the fifth lenses, whereby the optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras.
Claims24
An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:
- a first lens having refractive power;
- a second lens having refractive power;
- a third lens having refractive power;
- a fourth lens having refractive power;
- a fifth lens having refractive power;
- and
- an image plane;
- wherein the optical image capturing system consists of the five lenses with refractive power;
- each of at least two lenses among the first to the fifth lenses has at least an inflection point on at least one surface thereof;
- at least one lens among the first to the fifth lenses has positive refractive power;
- the fifth 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 fifth lens are aspheric surfaces;
- wherein the optical image capturing system satisfies:
- 1.2≤f/HEP≤6.0;
- 0.5≤HOS/f≤3;
- and
- 0.5≤SETP/STP<1;
- where f1, f2 f3, f4, and f5 are focal lengths of the first lens to the fifth 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 in parallel with the optical axis from a point on an object-side surface of the first lens where the optical axis passes through to a point on the image plane where the optical axis passes through;
- ETP1, ETP2, ETP3, ETP4, and ETP5 are respectively a thickness of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens at a height of ½ HEP from the optical axis;
- SETP is a sum of the aforementioned ETP1 to ETP5;
- TP1, TP2, TP3, TP4, and TP5 are respectively a thickness of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens on the optical axis;
- STP is a sum of the aforementioned TP1 to TP5;
- wherein the optical image capturing system further satisfies:
- 0.7≤|tan(HAF)|≤3.0;
- where HAF is a half of a view angle of the optical image capturing system.
24 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;
- a fourth lens having positive refractive power;
- a fifth lens having refractive power;
- and
- an image plane;
- wherein the optical image capturing system consists of the five lenses with refractive power;
- at least a surface of each of at least two lenses among the first to the third lenses has at least an inflection point;
- at least one lens of the second to the third lenses has positive refractive power;
- the fifth 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 fifth lens are aspheric surfaces;
- wherein the optical image capturing system satisfies:
- 1.2≤f/HEP≤6.0;
- 0.5≤HOS/f≤3.0;
- and
- 0.2≤EIN/ETL<1;
- where f1, f2 f3, f4, and f5 are focal lengths of the first lens to the fifth 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 in parallel with the optical axis between a point an object-side surface, which face the object side, of the first lens where the optical axis passes through and a point on the image plane where the optical axis passes through;
- ETL is a distance in parallel with the optical axis between a coordinate point on the object-side surface of the first lens at a height of ½ HEP from the optical axis and the image plane;
- EIN is a distance in parallel with the optical axis between the coordinate point on the object-side surface of the first lens at a height of ½ HEP from the optical axis and a coordinate point on the image-side surface of the fifth lens at a height of ½ HEP from the optical axis;
- wherein the optical image capturing system further satisfies:
- 0.7≤|tan(HAF)|≤3.0;
- where HAF is a half of a view angle of the optical image capturing system.
22 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;
- a fourth lens have positive refractive power, wherein at least one surface thereof has at least an inflection point thereon;
- a fifth lens having negative refractive power, wherein at least one surface thereof has at least an inflection point thereon;
- and
- an image plane;
- wherein the optical image capturing system consists of the five lenses having refractive power;
- at least one lens among the first lens to the third lens has at least an inflection point thereon;
- wherein the optical image capturing system satisfies:
- 1.2≤f/HEP≤3.0;
- 0.5≤HOS/f≤2.5;
- 0.7≤|tan(HAF)|≤3.0;
- and
- 0.2≤EIN/ETL<1;
- where f1, f2 f3, f4, and f5 are focal lengths of the first lens to the fifth 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 in parallel with the optical axis between a point on an object-side surface, which face the object side, of the first lens where the optical axis passes through and a point on the image plane where the optical axis passes through;
- ETL is a distance in parallel with the optical axis between a coordinate point on the object-side surface of the first lens at a height of ½ HEP from the optical axis and the image plane;
- EIN is a distance in parallel with the optical axis between the coordinate point on the object-side surface of the first lens at a height of ½ HEP from the optical axis and a coordinate point on the image-side surface of the fifth lens at a height of ½ HEP from the optical axis.
19 more elements
Dependencies are inferred from the claim text.