发明名称 |
Polarization beam splitter and optical system using the same, and image displaying apparatus, using the same |
摘要 |
In a conventional polarization beam splitter, it has been difficult to improve the angle-dependence characteristic of polarized beam splitting efficiency even if the number of layers is increased. The polarization beam splitter of the present invention is a polarization beam splitter having a polarized beam splitting layer having structure in which a plurality of gratings parallel to a first direction are periodically disposed in a second direction orthogonal to the first direction, and of light incident on the polarization beam splitter, chiefly light of a polarized component parallel to the first direction is transmitted therethrough, and chiefly light of a polarized component parallel to the second direction is reflected.
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申请公布号 |
US7116478(B2) |
申请公布日期 |
2006.10.03 |
申请号 |
US20040930128 |
申请日期 |
2004.08.31 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
MOMOKI KAZUHIKO;OHTAKA KEIJI |
分类号 |
G02B5/30;G02B27/28;G03B21/00 |
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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