公开(公告)号：US09645365B2

公开(公告)日：2017-05-09

申请号：US14541150

申请日：2014-11-14

Applicant: Young Optics Inc.

Inventor： Yu-Hung Chou ,  Ying-Hsiu Lin ,  Yuan-Hung Su ,  Shiu-Sheng Li

IPC: G02B13/18 ,  G02B13/16 ,  G03B27/32 ,  G02B9/04

CPC classification number: G02B13/18 ,  G02B9/04 ,  G02B13/16 ,  G03B27/32

Abstract: An optical lens includes a first lens group and a second lens group. The first lens group is disposed between a magnified side and a minified side and has a negative refractive power. The second lens group is disposed between the first lens group and the minified side and has a positive refractive power. The optical lens is capable of forming an image at the magnified side. F/H>0.52, where F is an effective focal length, and H is an image height. A viewing angle is greater than 116.7 degrees.