US 11,719,911 B2
Imaging optical lens assembly, image capturing unit and electronic device
Yu Jui Lin, Taichung (TW); Yu-Chun Ke, Taichung (TW); Jin Sen Wang, Taichung (TW); Wei-Yu Chen, Taichung (TW); and Chun-Yen Chen, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Dec. 8, 2020, as Appl. No. 17/115,731.
Application 17/115,731 is a continuation in part of application No. 16/897,737, filed on Jun. 10, 2020.
Claims priority of application No. 109104629 (TW), filed on Feb. 14, 2020.
Prior Publication US 2021/0255429 A1, Aug. 19, 2021
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01); G02B 13/02 (2006.01); G02B 27/00 (2006.01)
CPC G02B 9/64 (2013.01) [G02B 13/0045 (2013.01); G02B 13/02 (2013.01); G02B 27/0025 (2013.01)] 38 Claims
OG exemplary drawing
 
1. An imaging optical lens assembly comprising seven lens elements, and 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 there are a total of seven lens elements in the imaging optical lens assembly, 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 negative refractive power, the fifth lens element has an object-side surface being concave in a paraxial region thereof, the sixth lens element with negative refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, and the image-side surface of the sixth lens element has at least one critical point in an off-axis region thereof;
wherein a focal length of the imaging optical lens assembly is f, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a curvature radius of an object-side surface of the first lens element is R1, a curvature radius of the object-side surface of the sixth lens element is R11, a curvature radius of the image-side surface of the sixth lens element is R12, an Abbe number of the second lens element is V2, a refractive index of the second lens element is N2, and the following conditions are satisfied:
−0.60<f/R1<1.10;
f3/f2<1.60;
(|R11|+|R12|)/f<2.50; and
30<V2/N2.