发明名称 |
Tuneable liquid crystal optical filter |
摘要 |
A tuneable optical filter having a variable wavelength transmittance. The filter comprises a pre-polariser, a post-polariser and a birefringent plate positioned between the pre-polariser and the post-polariser. A twisted nematic liquid crystal cell (TN LCD) is positioned between the pre-polariser and the post-polariser, the TN LCD being controlled, in use, to tune the filter. A quarter wave plate is positioned adjacent the birefringent plate.
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申请公布号 |
US2003039019(A1) |
申请公布日期 |
2003.02.27 |
申请号 |
US20020169158 |
申请日期 |
2002.09.19 |
申请人 |
LARGE TIMOTHY;NEW MARY;CARMICHAEL ALLAN |
发明人 |
LARGE TIMOTHY;NEW MARY;CARMICHAEL ALLAN |
分类号 |
G02B5/30;G02F1/1335;G02F1/13357;G02F1/13363;G02F1/1347;G02F1/23;(IPC1-7):G02F1/07;G02F1/03 |
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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