US 12,436,367 B2
Imaging system lens assembly, image capturing unit and electronic device
Yu Jui Lin, Taichung (TW); Cheng-Chen Lin, Taichung (TW); Chun-Che Hsueh, Taichung (TW); Hsin-Hsuan Huang, Taichung (TW); and I-Hsuan Chen, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Aug. 10, 2022, as Appl. No. 17/885,418.
Claims priority of application No. 111119830 (TW), filed on May 27, 2022.
Prior Publication US 2023/0384558 A1, Nov. 30, 2023
Int. Cl. G02B 9/62 (2006.01)
CPC G02B 9/62 (2013.01) 26 Claims
OG exemplary drawing
 
1. An imaging system lens assembly comprising six lens elements, the six 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 and a sixth lens element, and each of the six lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein the first lens element has positive refractive power, the second lens element has negative refractive power, the fourth lens element has negative refractive power, the fifth lens element has positive refractive power, the image-side surface of the fifth lens element is concave in a paraxial region thereof, the sixth lens element has negative refractive power, the image-side surface of the sixth lens element has at least one inflection point, and a central thickness of the first lens element is a maximum among central thicknesses of all lens elements of the imaging system lens assembly;
wherein the imaging system lens assembly further comprises an aperture stop, a curvature radius of the object-side surface of the first lens element is R1, 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, an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, an axial distance between the aperture stop and the image-side surface of the sixth lens element is SD, an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, an axial distance between the first lens element and the second lens element is T12, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, and the following conditions are satisfied:
0.80<(R1+R12)/(R1−R12)<4.00;
0.30<(V2+V3)/V4<1.30;
0.92<SD/TD<1.20; and
0.20≤(T12+T45)/T56<5.00.