| 摘要 |
Thermally, electrically or magnetically controllable lyotropic liquid crystal optical devices. The 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.
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