US 12,287,459 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 TECHNLOGY CO., LTD., Taichung (TW)
Filed by ABILITY OPTO-ELECTRONICS TECHNOLOGY CO., LTD., Taichung (TW)
Filed on Oct. 12, 2021, as Appl. No. 17/499,540.
Claims priority of application No. 110124928 (TW), filed on Jul. 7, 2021.
Prior Publication US 2023/0020522 A1, Jan. 19, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01); G02B 27/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 27/0025 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An optical image capturing system, in order along an optical axis from an object side to an image side, consists of seven lenses with refractive power and is arranged as follows:
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 all lenses among the first to the seventh lenses are made of glass; at least one lens among the fifth to the seventh lenses has positive refractive power; each lens of the first to the seventh lenses 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;
TP3>TP6>TP2>TP4>TP7>TP5>TP1;
45 deg<HAF≤60 deg;
3≤HOS/HOI≤8; and
0.5≤SETP/STP<1;
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 perpendicular to the optical axis on the image plane; ETP1, ETP2, ETP3, ETP4, ETP5, ETP6, and ETP7 are respectively a thickness of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens at a height of half of the entrance pupil diameter away from the optical axis; SETP is a sum of the aforementioned ETP1 to ETP7; TP1, TP2, TP3, TP4, TP5, TP6, and TP7 are respectively a thickness of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens on the optical axis; STP is a sum of the aforementioned TP1 to TP7; the fifth lens and the sixth lens are adhered together to form a doublet lens; the first lens, the second lens, the third lens, the fourth lens, and the seventh lens are single lenses.