发明名称 |
Projection optical system and projection type image display apparatus |
摘要 |
A projection optical system which has a short projection distance and a compact structure, and allows oblique projection. The projection optical system projects luminous flux from an image forming element for forming an original image onto a projection surface which is oblique to a central principal ray which is a principal ray of luminous flux traveling from the center of the original image to the center of a finally formed image. The system includes a plurality of reflecting surfaces each having a curvature. In addition, the projection optical system satisfies a predetermined expression (1). <IMAGE> |
申请公布号 |
EP1387201(B1) |
申请公布日期 |
2007.07.25 |
申请号 |
EP20030254526 |
申请日期 |
2003.07.18 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
CHATANI, SAWAKO;KUREMATSU, KATSUMI;ISHII, TAKAYUKI;SUNAGA, TOSHIHIRO;KURIOKA, YOSHIAKI |
分类号 |
G02B13/18;G02B17/00;G02B17/06;G02B17/08;G02B27/18;G03B21/00;G03B21/14;H04N5/74 |
主分类号 |
G02B13/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|