发明授权
- 专利标题： Projection optical system unit and projection-type image display apparatus using the same
- 专利标题（中）： 投影光学系统单元和投影型图像显示装置
-
申请号： US11244546申请日： 2005-10-06
-
公开(公告)号： US07360906B2公开(公告)日： 2008-04-22
- 发明人: Satoshi Onishi , Atsushi Matsuura , Kohei Wataru
- 申请人： Satoshi Onishi , Atsushi Matsuura , Kohei Wataru
- 申请人地址： JP Hachioji-Shi
- 专利权人： Konica Minolta Opto, Inc.
- 当前专利权人： Konica Minolta Opto, Inc.
- 当前专利权人地址： JP Hachioji-Shi
- 代理机构： Sidley Austin LLP
- 优先权： JP2005-143827 20050517
- 主分类号： G03B21/14
- IPC分类号： G03B21/14 ; G03B21/22 ; G03B21/28 ; G03B21/18 ; G03B21/26 ; G03B21/56 ; G02B27/14 ; G02B5/10
摘要：
A projection optical system unit has a lower pedestal. The lower pedestal has first and second tubular portions opened to each other. An image formation device holding plate for a DMD is mounted on the first tubular portion at a side where one opening is formed. A mirror holder for a convex mirror is fixed on the second tubular portion at a side where the other opening is formed. A linear heat expansion coefficient in a specific direction of the lower pedestal component is set between 0.8×10−5 (1/K) and 3.0×10−5 (1/K).