Liquid-crystal optical system
AssigneesSaint-Gobain Glass France, Centre National De La Recherche Scientifique
InventorFrédéric Mondiot
Life of this patent
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Abstract
A liquid crystal optical system includes a variable polarization electro-switchable device forming a variable polarizer, the variable polarizer including first and second transparent electrodes with an electric field between the first and second electrodes, the first and second electrodes are coplanar, forming an alternation of first and second electrically conductive strips—at distinct potentials, and an electroactive layer made of a material including liquid crystals which are nematic and dichroic dyes.
Claims19
A liquid crystal optical system comprising a variable polarization electro-switchable device forming a variable polarizer, the variable polarizer comprising:
- first and second transparent electrodes with an electric field between the first and second electrodes, the first and second electrodes are coplanar, forming an alternation of first and second electrically conductive strips at distinct potentials, the first and second electrically conductive strips being elongated in a direction r0;
- an electroactive layer made of a material comprising liquid crystals which are nematic and dichroic dyes;
- a first unidirectional planar anchoring layer in a direction r1 on a main face of the electroactive layer and on the first and second electrodes, and
- a second unidirectional planar anchoring layer in a direction r2 different from the direction r1,
- wherein the variable polarizer is devoid of a static polarizing film to controllably alter a polarization state of transmitted light and achieve said variable polarization.
Dependencies are inferred from the claim text.