US 12,353,058 B2
Optical lens assembly and electrical device
Wen-Hsin Sun, Taoyuan (TW); Siang-Siuan Tsai, Taichung (TW); Jun-Yi Yu, Tainan (TW); and Ching-Cherng Sun, Taoyuan (TW)
Assigned to National Central University, Taoyuan (TW)
Filed by National Central University, Taoyuan (TW)
Filed on Oct. 12, 2022, as Appl. No. 18/045,834.
Claims priority of application No. 111128300 (TW), filed on Jul. 28, 2022.
Prior Publication US 2024/0036289 A1, Feb. 1, 2024
Int. Cl. G02B 9/64 (2006.01)
CPC G02B 9/64 (2013.01) 15 Claims
OG exemplary drawing
 
1. An optical lens assembly having an object side and an imaging side, the optical lens assembly comprising:
a first lens having a negative focal length, wherein the first lens has a convex aspheric surface toward the object side and a concave surface toward the imaging side;
a second lens having a negative focal length;
a third lens having a positive focal length;
a fourth lens having a negative focal length;
a fifth lens having a positive focal length;
a sixth lens having a negative focal length;
a seventh lens having a positive focal length; and
an eighth lens having a negative focal length, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are sequentially arranged from the object side to the imaging side along an optical axis, wherein the following conditions are satisfied:
TL/h<8;
f/EPD≤2; and
1<ΣCT/CT8<20,
wherein TL is a distance from the convex aspheric surface of the first lens to an imaging surface on the optical axis, h is a maximum imaging height of the optical lens assembly, f is a focal length of the optical lens assembly, EPD is an entrance pupil diameter of the optical lens assembly, ΣCT is a sum of thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens on the optical axis, and CT8 is a thickness of the eighth lens on the optical axis.