A new photopolymerizable material allows single-step, fast recording of volume holograms with properties that can be electrically controlled. Polymer-dispersed liquid crystals (PDLCs) in accordance with the invention preferably comprise a homogeneous mixture of a nematic liquid crystal and a multifunctional...http://www.google.ca/patents/US6677086?utm_source=gb-gplus-sharePatent US6677086 - Switchable volume hologram materials and devices
