发明名称 |
Image projection system |
摘要 |
A projection beam supplied by a projector is incident on a beam splitter in the form of a cholesteric filter. The cholesteric filter reflects circularly polarized radiation having a wavelength which corresponds to the pitch of the molecular helix and having a direction of rotation which corresponds to the direction of the molecular helix to a reflector. The circular direction of polarization reflected by the cholesteric filter is inverted on the reflector so that the beam is subsequently passed to the screen by the cholesteric filter.
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申请公布号 |
US5879067(A) |
申请公布日期 |
1999.03.09 |
申请号 |
US19970846928 |
申请日期 |
1997.04.30 |
申请人 |
DE VAAN, ADRIANUS J. S. M. |
发明人 |
DE VAAN, ADRIANUS J. S. M. |
分类号 |
G03B21/10;H04N5/74;(IPC1-7):G03B21/28 |
主分类号 |
G03B21/10 |
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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