An uncured cholesteric liquid crystal layer 18 having a cholesteric order, including nematic liquid crystal, a chiral agent and a photopolymerization initiator is formed on an alignment film 16 on a glass substrate 12. This uncured cholesteric liquid crystal layer 18 is cured by applying to it ultraviolet...http://www.google.es/patents/US6816215?utm_source=gb-gplus-sharePatente US6816215 - Circular polarization controlling optical element and method of producing the same
Circular polarization controlling optical element and method of producing ...
