	US 11,719,917 B2
	Optical image capturing system
Yeong-Ming Chang, Taichung (TW); Chien-Hsun Lai, Taichung (TW); and Yao-Wei Liu, Taichung (TW)
Assigned to Ability Opto—Electronics Technology Co., Ltd., Taichung (TW)
Filed by ABILITY OPTO-ELECTRONICS TECHNOLOGY CO., LTD., Taichung (TW)
Filed on Jun. 4, 2020, as Appl. No. 16/892,924.
Claims priority of application No. 109101825 (TW), filed on Jan. 17, 2020.
Prior Publication US 2021/0223511 A1, Jul. 22, 2021
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01); H04N 5/33 (2023.01)

CPC G02B 13/008 (2013.01) [G02B 9/64 (2013.01); G02B 13/0045 (2013.01); H04N 5/33 (2013.01)]

14 Claims

1. 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;

an aperture;

a second lens having negative refractive power;

a third lens having refractive power;

a fourth lens having refractive power;

a fifth lens having positive refractive power;

a sixth lens having positive refractive power;

a seventh lens having negative refractive power; and

an image plane specifically for infrared light;

wherein the optical image capturing system has a total of the seven lenses with refractive power; each lens among the first lens to the seventh lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; wherein the object-side surface of the first lens is a convex surface, and the image-side surface of the first lens is a concave surface; the image-side surface of the second lens is a concave surface; the object-side surface of the fourth lens is a convex surface, and the image-side surface of the fourth lens is a concave surface; the object-side surface of the fifth lens is a convex surface, and the image-side surface of the fifth lens is a concave surface; the image-side surface of the seventh lens is a concave surface;

wherein the optical image capturing system satisfies:

0.5≤f/HEP≤1.0;

IN56>IN23;

IN56>IN34;

IN56>IN45;

20.5346 deg<HAF≤30.7306 deg; and

0.9≤2(ARE/HXP)≤2.0;

wherein f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HXP is an exit pupil diameter of the image-side surface of the seventh lens; HAF is a half of a maximum field angle of the optical image capturing system; for any surface of any lens, ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the exit pupil diameter away from the optical axis; IN23 is a distance on the optical axis between the second lens and the third lens, IN34 is a distance on the optical axis between the third lens and the fourth lens, IN45 is a distance on the optical axis between the fourth lens and the fifth lens, and IN56 is a distance on the optical axis between the fifth lens and the sixth lens.