- 专利标题： Projection apparatus and projection lens thereof capable of reducing focal length and aberration
-
申请号： US13337168申请日： 2011-12-26
-
公开(公告)号： US09612515B2公开(公告)日： 2017-04-04
- 发明人: Ya-Ling Hsu , Ching-Lun Lin
- 申请人： Ya-Ling Hsu , Ching-Lun Lin
- 申请人地址： TW Hsinchu
- 专利权人： Young Optics Inc.
- 当前专利权人： Young Optics Inc.
- 当前专利权人地址： TW Hsinchu
- 代理机构： Jianq Chyun IP Office
- 主分类号： G03B21/28
- IPC分类号： G03B21/28 ; G02B13/16 ; G02B13/18
摘要：
A projection lens including a reflective unit and a refractive unit is provided. The projection lens is disposed between an object side and an image side. The reflective unit is disposed between the object side and the image side and has a negative refractive power. The refractive unit is disposed between the object side and the reflective unit and has a positive refractive power. The refractive unit includes a first lens group and a second lens group. The first lens group is disposed between the object side and the reflective unit and includes at least one cemented lens and an aperture stop. The at least one cemented lens is disposed between the object side and the aperture stop. The second lens group is disposed between the first lens group and the reflective unit and includes at least one aspheric lens. A projection apparatus including the projection lens is also provided.
公开/授权文献
- US20130162957A1 PROJECTION APPARATUS AND PROJECTION LENS THEREOF 公开/授权日：2013-06-27
信息查询
