US 12,326,544 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 Nov. 17, 2021, as Appl. No. 17/455,287.
Claims priority of application No. 110124412 (TW), filed on Jul. 2, 2021.
Prior Publication US 2023/0016306 A1, Jan. 19, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/62 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01)] 19 Claims
OG exemplary drawing
 
8. An optical image capturing system, from an object side to an image side, comprising:
a first lens with positive refractive power, wherein an object-side surface of the first lens on the optical axis is a concave surface and an image-side surface of the first lens on the optical axis is a convex surface;
a second lens with positive refractive power;
a third lens with positive refractive power;
a fourth lens with 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, each of the first lens to the sixth lens is made of plastic, 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 half maximum angle of view of the optical image capturing system is denoted by HAF, with a point on any surface of any one of the six lenses which crosses the optical axis defined as a starting point, a length of an outline curve from the starting point to a coordinate point of vertical height with a distance from the optical axis to ½ HEP on the surface along an outline of the surface is denoted by ARE, and the following conditions are satisfied:
1.8≤f/HEP≤2.4; 45 deg≤HAF≤55 deg; 1.7≤HOS/f≤1.85; and 0.9≤2(ARE/HEP)≤2.0,
wherein an effective maximum radius of any surface of any one lens among the six lenses is denoted by EHD, and with a point on any surface of any one of the six lenses which crosses the optical axis defined as a first starting point, and with a maximum effective half diameter position of the surface along the outline of the surface defined as a first final point, a length of outline curve from the first starting point to the first final point is denoted by ARS, and the following condition is satisfied:
0.9≤ARS/EHD≤2.0;
wherein a distance between the first lens and the second lens on the optical axis is denoted by IN12, a distance between the second lens and the third lens on the optical axis is denoted by IN23, and the following condition is satisfied:
0.13≤IN12/IN23≤0.22.