US 12,443,014 B2
Imaging system lens assembly, imaging apparatus and electronic device
Hsin-Hsuan Huang, Taichung (TW); and Cheng-Yu Tsai, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Mar. 31, 2023, as Appl. No. 18/193,740.
Claims priority of application No. 111118513 (TW), filed on May 18, 2022.
Prior Publication US 2023/0375808 A1, Nov. 23, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/60 (2006.01); G02B 13/02 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/60 (2013.01); G02B 13/02 (2013.01)] 32 Claims
OG exemplary drawing
 
1. An imaging system lens assembly comprising five lens elements, the five 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 and a fifth lens element; each of the five lens elements has an object-side surface towards the object side and an image-side surface towards the image side;
wherein the first lens element has positive refractive power, the object-side surface of the first lens element is convex in a paraxial region thereof;
wherein an axial distance between the image-side surface of the fifth lens element and an image surface is BL, an axial distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element is TD, an f-number of the imaging system lens assembly is Fno, half of a maximum field of view of the imaging system lens assembly is HFOV, a focal length of the imaging system lens assembly is f, a central thickness of the first lens element is CT1, and the following conditions are satisfied:
2.5<BL/TD<10.0;
1.0<Fno<3.8;
4.0 degrees<HFOV<18.0 degrees;
0.01<f/BL<1.25; and
0.01<CT1/BL<0.12.