Patent ID: 6331910
Filing Date: 2001-12-18
Classification: G02F

Abstract:
An arrangement for achieving an electrical control of an intensity of a non-polarized light, comprising:a beam splitter for splitting a supplied light into a plurality of polarized light bundles that are orthogonal with respect to each other;a downstream first reflecting device for parallelizing each one of the plurality of polarized light bundles;a plurality of transparent electrodes;a plurality of electrically controllable liquid crystal cells that are connected behind one another, wherein:the plurality of electrically controllable liquid crystal cells are embeddedbetween the plurality of transparent electrodes, andthe plurality of electrically controllable liquid crystal cells alter a polarization of the plurality of polarized light bundles as a function of a control voltage that is applied to the plurality of transparent electrodes; andat least one downstream second reflecting device arranged to reflect the plurality of polarized light bundles in an opposite direction such that the plurality of polarized light bundles pass through the plurality of electrically controllable liquid crystal cells a second time and subsequently are at least partially reunited by the first reflecting device and the beam splitter depending on the polarization and are fed to at least one output location where the electrically controlled light can be extracted.