发明名称 |
Projection optical system, projection type image display apparatus, and image display system |
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).
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申请公布号 |
US2004027544(A1) |
申请公布日期 |
2004.02.12 |
申请号 |
US20030630556 |
申请日期 |
2003.07.30 |
申请人 |
CHATANI SAWAKO;KUREMATSU KATSUMI;ISHII TAKAYUKI;SUNAGA TOSHIHIRO;KURIOKA YOSHIAKI |
发明人 |
CHATANI SAWAKO;KUREMATSU KATSUMI;ISHII TAKAYUKI;SUNAGA TOSHIHIRO;KURIOKA YOSHIAKI |
分类号 |
G02B13/18;G02B17/06;G02B17/08;G02B27/18;G03B21/00;G03B21/14;H04N5/74;(IPC1-7):G03B21/26 |
主分类号 |
G02B13/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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