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.

公开(公告)号：US09335524B2

公开(公告)日：2016-05-10

申请号：US14311516

申请日：2014-06-23

Applicant: Young Optics Inc.

Inventor： Yi-Hsueh Chen ,  Hsin-Hung Lin ,  Chun-Tung Wu ,  Kun-Yao Chen

IPC: G02B9/00 ,  G02B13/16 ,  G02B13/18

CPC classification number: G02B13/16 ,  G02B13/18

Abstract: A projection lens for a projection device having a light valve is provided. The light valve provides an image light beam. The projection lens includes a first lens group, a second lens group and a reflecting lens group. The second lens group is disposed between the first lens group and the reflecting lens group. The first lens group has positive refractive power. The second lens group has positive refractive power and includes a plurality of lenses and an aperture stop located between the lenses. An angle of a field of view of the second lens group is less than 100 degrees. The reflecting lens has negative reflective power and has a curved reflecting surface to reflect the image light beam passed through the second lens group.

Abstract translation: 提供一种具有光阀的投影装置的投影透镜。 光阀提供图像光束。 投影透镜包括第一透镜组，第二透镜组和反射透镜组。 第二透镜组设置在第一透镜组和反射透镜组之间。 第一透镜组具有正屈光力。 第二透镜组具有正折光力并且包括位于透镜之间的多个透镜和孔径光阑。 第二透镜组的视野角小于100度。 反射透镜具有负反射能力并且具有弯曲的反射表面以反射通过第二透镜组的图像光束。