公开(公告)号：US11899170B2

公开(公告)日：2024-02-13

申请号：US16918265

申请日：2020-07-01

Applicant: Young Optics Inc.

Inventor： Yu-Chen Lin ,  Chun-Tung Wu

IPC: G02B13/00 ,  G02B9/34 ,  G02B1/04 ,  G03B21/20 ,  G02B27/42

CPC classification number: G02B13/004 ,  G02B1/041 ,  G02B9/34 ,  G02B13/0055 ,  G02B27/4205 ,  G03B21/2006

Abstract: An optical lens includes a first lens with a positive refractive power, a second lens having a diffractive optical surface and a negative refractive power, and a third lens with a positive refractive power arranged in order from a magnified side to a minified side. A total number of lenses with refractive powers in the optical lens is smaller than six, and the first lens, the second lens and the third lens are made of plastic.