Liquid Crystal Light Valves with Organic Polymeric Photoconductors

Abstract

It has been suggested to use organic polymerle photoconductors in the liquid crystal light valves instead of widely used inorganic ones. Light valves with photoconductive sensibilized polyimides with various types of electro-optical effects in liquid crystals were constructed and tested. The influences of the read-on light regimes and control voltages were analysed. High resolution up to 1500 mm^?1 at diffraction efficiency 0.1%, and 40% at space frequencies up to 100 mm^?1 were obtained in pulse regimes. Thin holograms can be effectively read on such modulators in reversible mode in real time. The results obtained permit to come to a conclusion about prospects of the organic polymeric photoconductor usage in liquid crystal light valves and applications of the latter for input and output of the optical information.