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Broadband cholesteric an optical device, polarizer, filters, a liquid crystal device and a polarizing beam splitter
Broadband cholesteric an optical device, polarizer, filters, a liquid crystal device and a polarizing beam splitter
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机译:宽带胆甾醇型光学器件,偏振器,滤光片,液晶器件和偏振分束器
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摘要
A broadband cholesteric optical device such as a polariser or spectral filter comprises a broadband cholesteric layer 1, for instance of the graded pitch type such that the cholesteric pitch increases monotonically from one surface 2 of the film 1 to the other 3. In order to improve the off-axis performance, a compensator is provided in the form of a positive birefringence film 8 whose optic axis is substantially perpendicular to the film. Another negative birefringence film 9 whose optic axis is also perpendicular to the film may also be provided.
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