Thermally electrically or magnetically controllable lyotropic liquid crystal optical devices

摘要

Thermally, electrically or magnetically controllable lyotropic liquid crystal optical devices.PPThe optical device comprises two insulating walls (6, 8) joined together by their edges by means of a sealing joint (9) and a lyotropic liquid crystal film (10) placed between the walls and whose light transmission varies as a function of the temperature, said liquid crystal being formed from 5 to 20% by weight of alcohol, 0 to 20% by weight of a quaternary ammonium halide, 0 to 94% by weight of oil and 1 to 95% by weight of water, the ratio of the mass of ammonium halide to the mass of alcohol being below 2.