US 11,927,729 B2
Photographing optical lens assembly, imaging apparatus and electronic device
Tzu-Chieh Kuo, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Sep. 3, 2021, as Appl. No. 17/465,995.
Application 17/465,995 is a continuation of application No. 16/382,648, filed on Apr. 12, 2019, granted, now 11,137,576.
Claims priority of application No. 107123175 (TW), filed on Jul. 4, 2018.
Prior Publication US 2021/0396974 A1, Dec. 23, 2021
Int. Cl. G02B 3/02 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 13/18 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 13/18 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A photographing optical lens assembly comprising eight lens elements, the eight lens elements being, in order from an object side to an image side:
a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element;
wherein each of the eight lens elements has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the first lens element has negative refractive power, the eighth lens element has negative refractive power, the image-side surface of the eighth lens element is concave in a paraxial region thereof and comprises at least one critical point in an off-axis region thereof, and at least one surface of the object-side surface and the image-side surface of at least one lens element of the eight lens elements is aspheric and comprises at least one inflection point;
wherein a half of a maximum field of view of the photographing optical lens assembly is HFOV, an axial distance between the object-side surface of the first lens element and an image surface is TL, a focal length of the photographing optical lens assembly is f, a focal length of the first lens element is f1, a vertical distance between the critical point in the off-axis region on the image-side surface of the eighth lens element and an optical axis is Yc82, a vertical distance between a maximum effective diameter position of the image-side surface of the eighth lens element and the optical axis is Y82, and the following conditions are satisfied:
55.0 degrees<HFOV;
1.0 mm<TL<12.0 mm;
−1.50<f/f1≤−0.35; and
0.10<Yc82/Y82<0.90.