US 11,906,714 B2
Photographing optical lens assembly, image capturing unit and electronic device
Kuo-Jui Wang, Taichung (TW); Cheng-Chen Lin, Taichung (TW); and Wei-Yu Chen, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Aug. 23, 2022, as Appl. No. 17/893,803.
Application 17/893,803 is a continuation of application No. 16/838,772, filed on Apr. 2, 2020, granted, now 11,460,678.
Claims priority of application No. 108147636 (TW), filed on Dec. 25, 2019.
Prior Publication US 2023/0003980 A1, Jan. 5, 2023
Int. Cl. G02B 9/00 (2006.01); G02B 13/18 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01)
CPC G02B 13/18 (2013.01) [G02B 9/64 (2013.01); G02B 13/0045 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A photographing optical lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element;
wherein the first lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, the third lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof, the fourth lens element has positive refractive power, the seventh lens element has an image-side surface being concave in a paraxial region thereof, the image-side surface of the seventh lens element has at least one convex critical point in an off-axis region thereof, and an absolute value of a curvature radius of an image-side surface of the fifth lens element is larger than an absolute value of a curvature radius of an image-side surface of the first lens element;
wherein an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing optical lens assembly is ImgH, a curvature radius of the object-side surface of the first lens element is R1, the curvature radius of the image-side surface of the first lens element is R2, and the following conditions are satisfied:
TL/ImgH<2.4; and
−1.50<(R1+R2)/(R1−R2)<0.75.