Complex diffraction device
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United States of America Patent
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Jun 15, 2004
Grant Date -
Aug 1, 2002
app pub date -
Mar 22, 2002
filing date -
Sep 27, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A complex diffraction device, which is excellent in designability, easy in setting the diffraction angle, adaptable to size increase, and easy to handle by adding a diffraction function resulting from an uneven pattern to the diffraction device comprising a liquid crystalline layer where the helical orientation of the smectic liquid crystal phase having a helical structure is maintained.
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