| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid crystal optical element capable of being switched symmetrically with a predetermined angle with a center axis R of crossing uniaxial orientation treatment as a center when an electric field is applied. SOLUTION: In the liquid crystal optical element, a pair of transparent substrates 61a and 61b, and driving electrodes 62a and 62b provided on the substrates are included. The uniaxial orientation treatment is applied to each substrate. In pinched space with a predetermined gap between the substrates, a ferroelectric liquid crystal 65 is enclosed which shows the phase series of an isotropic phase, a chiral nematic phase, a smectic A phase, and a smectic C phase from a high temperature side, and two orientation states are switched according to an electric field application direction. The center axis R of an angle formed by molecule axes of two orientation states is set to be in a desired direction, and uniaxial orientation treatment directions 66a and 66b are crossing with the desired direction as a center axis. When the uniaxial orientation treatment is performed in parallel in a non-electric field, the orientation treatment directions are crossing in the same twist direction with the twist direction indicated by the chiral smectic phase. COPYRIGHT: (C)2010,JPO&INPIT
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