An electro-optic shutter is provided that includes first and second liquid crystal devices located along an optical path and first and second color-selective layers located between the first and second liquid crystal devices. Each liquid crystal device is adapted to rotate the polarization of incident...http://www.google.es/patents/US6490017?utm_source=gb-gplus-sharePatente US6490017 - Separating white light into polarized, colored light
Separating white light into polarized, colored light
