US 12,422,650 B2
Image capturing system lens assembly, imaging apparatus and electronic device
Hsin-Hsuan Huang, Taichung (TW); and Meng-Kuan Cho, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Jun. 14, 2022, as Appl. No. 17/839,779.
Prior Publication US 2023/0141883 A1, May 11, 2023
Int. Cl. G02B 9/60 (2006.01); G02B 13/00 (2006.01); G03B 17/17 (2021.01)
CPC G02B 13/0045 (2013.01) [G02B 13/0065 (2013.01); G03B 17/17 (2013.01)] 41 Claims
OG exemplary drawing
 
1. An image capturing 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 second lens element has positive refractive power; the third lens element has negative refractive power; at least one of the object-side surface and the image-side surface of at least one of the first lens element to the fifth lens element comprises at least one inflection point;
wherein the image capturing system lens assembly further comprises an aperture stop, an axial distance between the aperture stop and an image surface is SL, an axial distance between the object-side surface of the first lens element and the image surface is TL, a focal length of the image capturing system lens assembly is f, a composite focal length of the third lens element and the fourth lens element is f34, a composite focal length of the fourth lens element and the fifth lens element is f45, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, a curvature radius of the object-side surface of the second lens element is R3, a curvature radius of the image-side surface of the second lens element is R4, a curvature radius of the object-side surface of the third lens element is R5, a curvature radius of the image-side surface of the third lens element is R6, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, a central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, and the following conditions are satisfied:
0.76<SL/TL<1.50;
0.82<T12/f<1.38;
1.05<(R3+R4)/(R3−R4)<0.70;
3.50<(R5+R6)/(R5−R6)<3.00;
2.50<f/f45<0.88;
5.00<f34/f45<3.60; and
0.30<(CT2+T23+CT3+T34+CT4+T45+CT5)/f<2.02.