Polymer film
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United States of America Patent
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Apr 17, 2001
Grant Date -
N/A
app pub date -
Sep 16, 1998
filing date -
Sep 17, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polymer film with a helically twisted molecular structure exhibiting at least two maxima of the selective reflection wavelength. A process of preparing such a polymer film and processes for using such polymer film in optical data storage devices, photomasks, decorative pigments, cosmetics, security devices or active and passive optical elements such as polarizers, optical retarders or color filters.
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