US 12,270,973 B2
Optical image capturing system including seven lenses of −+−++−+, −+++−++ or −−++−++ refractive powers
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 Oct. 12, 2021, as Appl. No. 17/499,312.
Claims priority of application No. 110124929 (TW), filed on Jul. 7, 2021.
Prior Publication US 2023/0025027 A1, Jan. 26, 2023
Int. Cl. G02B 9/64 (2006.01); G02B 13/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 22 Claims
OG exemplary drawing
 
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 negative refractive power;
a second lens having refractive power;
a third lens having positive refractive power;
a fourth lens having positive refractive power;
a fifth lens having refractive power;
a sixth lens having refractive power;
a seventh lens having refractive power; and
an image plane;
wherein the optical image capturing system has a total of the seven lenses with refractive power; all lenses among the first lens to the seventh lens are made of glass; at least one lens among the fifth to the seventh lenses has positive 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 optical image capturing system satisfies:
1.4≤f/HEP≤1.8;
45 deg<HAF≤60 deg;
TP3>TP6>TP2>TP4>TP7>TP5>TP1;
3≤HOS/HOI≤8; and
0.9≤2≤(ARE/HEP)≤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; HAF is a half of a maximum field angle of the optical image capturing system; HOS is a distance between the object-side surface of the first lens and the image plane on the optical axis; HOI is a maximum height for image formation on the image plane perpendicular to the optical axis; 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 entrance pupil diameter away from the optical axis, TP1 is a thickness of the first lens on the optical axis; TP2 is a thickness of the second lens on the optical axis; TP3 is a thickness of the third lens on the optical axis; TP4 is a thickness of the fourth lens on the optical axis; TP5 is a thickness of the fifth lens on the optical axis; TP6 is a thickness of the sixth lens on the optical axis; TP7 is a thickness of the seventh lens on the optical axis.