发明名称 |
Color combining optical system, projection-type display optical system, projection-type image display apparatus, and image display system |
摘要 |
A color combining optical system which can suppress occurrence of a thermal problem and increase in size is disclosed. The color combining optical system comprises a first optical element which has a first optical film reflecting light having a first polarizing direction and transmitting light in a second polarizing direction and combines the first and second color lights by the first optical film. In addition, the optical system comprises a polarizing plate which analyzes a third color light. Furthermore, the optical system comprises a second optical element which combines, by a second optical film, the third color light transmitted through the polarizing plate with the first and second color lights combined by the first optical element.
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申请公布号 |
US6992833(B2) |
申请公布日期 |
2006.01.31 |
申请号 |
US20030631393 |
申请日期 |
2003.07.31 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
CHIGIRA TATSUO;OKUYAMA ATSUSHI;ABE MASAYUKI |
分类号 |
G02B5/04;G02B27/10;G02B27/14;G02B27/28;G02F1/13;G02F1/1335;G03B21/00;G03B21/16;H04N9/31 |
主分类号 |
G02B5/04 |
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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