US 12,124,016 B2
Lens assembly
Hsi-Ling Chang, Taichung (TW); Chien-Hung Chen, Taichung (TW); Ming-Huang Tseng, Taichung (TW); Guo-Yang Wu, Taichung (TW); and Bo-Yan Chen, Taichung (TW)
Assigned to SINTAI OPTICAL (SHENZHEN) CO., LTD., Shenzhen (CN); and ASIA OPTICAL CO., INC., Taichung (TW)
Filed by Sintai Optical (Shenzhen) Co., Ltd., ShenZhen (CN); and Asia Optical Co., Inc., Taichung (TW)
Filed on Apr. 1, 2022, as Appl. No. 17/711,071.
Claims priority of application No. 202111571471 (CN), filed on Dec. 21, 2021.
Prior Publication US 2022/0326486 A1, Oct. 13, 2022
Int. Cl. G02B 15/14 (2006.01); G02B 13/00 (2006.01); G02B 13/02 (2006.01)
CPC G02B 13/009 (2013.01) [G02B 13/02 (2013.01); G02B 15/144 (2019.08)] 21 Claims
OG exemplary drawing
 
1. A lens assembly comprising:
a first lens group which is with refractive power;
a second lens group which is with positive refractive power;
a third lens group which is with positive refractive power;
a fourth lens group which is with refractive power; and
a reflective element which comprises a reflective surface;
wherein a light from an object sequentially passes through the first lens group, the second lens group, the third lens group, and the fourth lens group to an image side along an axis;
wherein the reflective element is disposed between an object side and the image side along the axis;
wherein intervals of the lens groups are changeable when the lens assembly zooms from a wide-angle end to a telephoto end;
wherein the lens assembly satisfies at least one of following conditions:
0.1<DG34W/TTL<0.5;
0<DG23W/Dmax<1;
0.3<Dp/Dmax<2;
3.8<TTL/Dmax<5.2;
wherein DG23W is an interval from the second lens group to the third lens group along the axis as the lens assembly is at the wide-angle end, DG34W is an interval from the third lens group to the fourth lens group along the axis as the lens assembly is at the wide-angle end, TTL is an interval from an object side surface of the lens which is closest to the object side to an image plane along the axis, Dmax is a maximum effective optical diameter among all of the lenses, and Dp is an effective optical diameter of the reflective surface.