Cholesteric liquid crystal films using varying pitch helix structures aligned perpendicular to the surface of the film for broadband reflection and transmission of circularly polarized light distort the light at large viewing angles of incidence due to the elliptical cross section of the CLC helix with...http://www.google.es/patents/US6630974?utm_source=gb-gplus-sharePatente US6630974 - Super-wide-angle cholesteric liquid crystal based reflective broadband polarizing films
Super-wide-angle cholesteric liquid crystal based reflective broadband ...
