US 12,449,636 B2
Lens assembly
Ming-Chung 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 Dec. 23, 2022, as Appl. No. 18/145,918.
Claims priority of application No. 202210543496.1 (CN), filed on May 19, 2022.
Prior Publication US 2023/0375813 A1, Nov. 23, 2023
Int. Cl. G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 15/14 (2006.01); G02B 27/00 (2006.01); G02B 27/64 (2006.01)
CPC G02B 9/64 (2013.01) [G02B 13/0045 (2013.01); G02B 15/1431 (2019.08); G02B 27/0025 (2013.01); G02B 27/646 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A lens assembly comprising:
a first lens group which is with positive refractive power and comprises at least four lenses arranged in order from an object side to an image side along an optical axis, among which the lens closest to the object side comprises a convex surface facing the object side, and the lens closest to the image side comprises a convex surface facing the image side;
a second lens group which is with negative refractive power and comprises a 2-1 lens and a 2-2 lens, wherein the 2-2 lens comprises a convex surface facing the image side; and
a third lens group which is with negative refractive power and comprises a 3-1 lens, wherein the 3-1 lens is a meniscus lens with negative refractive power;
wherein the first lens group, the second lens group, and the third lens group are arranged in order from the object side to the image side along the optical axis;
wherein the 2-1 lens and the 2-2 lens are arranged in order from the object side to the image side along the optical axis;
wherein the second lens group can move along the direction perpendicular to the optical axis; and the third lens group can move along the optical axis;
wherein the lens closest to the object side is with positive refractive power.