发明名称 |
POLARIZED LIGHT SEPARATOR, METHOD OF MANUFACTURING THE SAME, AND PROJECTION DISPLAY |
摘要 |
<p>The invention provides a plate-shaped polarized light separation device that has a repetitive structure of polarized light separation film surfaces and reflective film surfaces arranged alternately at a fine pitch, along with a projection display apparatus that uses this polarized light separation device. In the process of manufacturing the polarized light separation device, first a glass block is formed by alternately pasting together plate glass with a polarized light separation film made up of a multi-layer thin film of inorganic material upon its surface and plate glass with a reflecting film upon its surface, and this glass block is cut obliquely to the pasted surfaces. A projection that is usable at the time of the positioning of the polarization beam splitter may be provided on at least one side of this plate-shaped block that is thus cut out. By providing a lambda /2 phase plate on portions of the light exit surface of this polarized light separation device, one obtains a polarized light separation device that takes light from a light source and emits it as a light flux having only one direction of polarization, either S-polarized light or P-polarized light. Such a polarized light separation device can be used in a projection display apparatus. <IMAGE></p> |
申请公布号 |
EP0829739(A1) |
申请公布日期 |
1998.03.18 |
申请号 |
EP19970907298 |
申请日期 |
1997.03.12 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
HASHIZUME, TOSHIAKI;ITOH, YOSHITAKA;YAJIMA, AKITAKA |
分类号 |
G02B5/30;G02B5/04;G02B19/00;G02B27/18;G02B27/28;G02F1/13;G02F1/1335;G03B21/00;G03B21/14;G09F9/00;H04N5/74;H04N9/31;(IPC1-7):G02B5/30;G02F1/133 |
主分类号 |
G02B5/30 |
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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