Patent ID: 11947086
Assignee: ABILITY OPTO-ELECTRONICS TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. An optical image capturing system, from an object side to an image side, comprising:
a first lens with negative refractive power;
a second lens with positive refractive power;
a third lens with refractive power;
a fourth lens with negative refractive power;
a fifth lens with refractive power;
a sixth lens with refractive power; and
an image plane;
wherein the optical image capturing system comprises the six lenses with refractive power, a maximum height for image formation on the image plane perpendicular to an optical axis in the optical image capturing system is HOI, at least one lens among the second lens to the sixth lens has positive refractive power, focal lengths of the first lens through the sixth lens are f1, f2, f3, f4, f5 and f6, respectively, and a focal length of the optical image capturing system is f, the entrance pupil diameter of the optical image capturing system is denoted by HEP, a distance on the optical axis from an object side of the first lens to the image plane is denoted by HOS, a distance on the optical axis from the object side of the first lens to the image side of the sixth lens is denoted by InTL, a half maximum angle of view of the optical image capturing system is denoted by HAF, a horizontal distance parallel to the optical axis from a first coordinate point on the object side of the first lens at height of ½ HEP to the image plane is denoted by ETL, a horizontal distance parallel to the optical axis from the first coordinate point on the object side of the first lens at height of ½ HEP to a second coordinate point on the image side of the sixth lens at height of ½ HEP is denoted by EIN, and the following conditions are satisfied:

2.6≤f/HEP≤2.8, 50 deg<HAF≤70 deg, 2.5≤HOS/f≤5, and 0.2≤EIN/ETL<1.