US 11,947,090 B2
Lens module
Chun-Yu Hsueh, Taichung (TW); Tsung-Tse Chen, Taichung (TW); and Chun-Hung Huang, 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 Jan. 3, 2022, as Appl. No. 17/567,281.
Claims priority of application No. 110104459 (TW), filed on Feb. 5, 2021.
Prior Publication US 2022/0252850 A1, Aug. 11, 2022
Int. Cl. G02B 15/14 (2006.01); G02B 5/08 (2006.01)
CPC G02B 15/142 (2019.08) [G02B 5/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A lens module, comprising:
a plurality of lenses;
an annular body; and
a reflective element;
wherein the reflective element, the lenses and the annular body are sequentially arranged along an optical axis from an object side to an image side;
wherein the reflective element is disposed between the object side and the lenses, and the reflective element comprises a reflective surface;
wherein the annular body is disposed between the object side and the lenses, between the lenses, or between the lenses and the image side;
wherein the annular body is an aperture or a light-shielding element, the light-shielding element comprises an action element, a variable hole and a driving element, and the action element surrounds the optical axis to form the variable hole and is driven by the driving element to change an inner diameter of the variable hole;
wherein the lens module satisfies 0.5 mm<EPA/PL<5.5 mm where EPA is an area of an entrance pupil of the lens module, and PL is a length of the reflective element, the reflective surface comprises a side, the length of the reflective element equals a length of the side of the reflective surface, and the side of the reflective surface is perpendicular to the optical axis.