Invention Grant
- Patent Title: Refractive optics and projection display apparatus
- Patent Title (中): 折射光学和投影显示装置
-
Application No.: US13078349Application Date: 2011-04-01
-
Publication No.: US08641208B2Publication Date: 2014-02-04
- Inventor: Ryuhei Amano , Takashi Ikeda , Kazuhisa Takahashi , Yoshitsugu Kohno , Osamu Nagase
- Applicant: Ryuhei Amano , Takashi Ikeda , Kazuhisa Takahashi , Yoshitsugu Kohno , Osamu Nagase
- Applicant Address: JP Moriguchi-shi JP Hanamaki
- Assignee: Sanyo Electric Co., Ltd.,Ricoh Optical Industries Co., Ltd.
- Current Assignee: Sanyo Electric Co., Ltd.,Ricoh Optical Industries Co., Ltd.
- Current Assignee Address: JP Moriguchi-shi JP Hanamaki
- Agency: Mots Law, PLLC
- Agent Marvin A. Motsenbocker
- Priority: JP2008-258972 20081003
- Main IPC: G03B21/20
- IPC: G03B21/20 ; G02B7/02

Abstract:
Disclosed are a projection display apparatus and a projection optics provided in the projection display apparatus. The projection optics has a refractive optics and a reflective optics. In the refractive optics, a lens (non-circular lens) provided on a reflective optics side has a non-circular shape forming part of an imaginary circular region whose center is an optical axis center of the refractive optics. In other words, the non-circular lens has a shape of a cut-out portion of an imaginary circular lens having an optical axis center coinciding with the optical axis center of the refractive optics.
Public/Granted literature
- US20110292355A1 REFRACTIVE OPTICS AND PROJECTION DISPLAY APPARATUS Public/Granted day:2011-12-01
Information query