Liquid crystal optical device

Details Liquid crystal optical device Liquid crystal optical device

1989-05-05

1990-02-06

Miller, Stanley D.

350332, G02F 113

Patent

active

048984566

ABSTRACT:
A liquid crystal optical device, comprising: (a) a liquid crystal cell comprising a pair of base plates and a ferroelectric smectic liquid crystal disposed between the base plates and capable of being oriented to one of stable orientation states including a first stable orientation state on one side and a second stable orientation state on the other side under no electric field; (b) means for applying an alternating electric field capable of orienting the ferroelectric smectic liquid crystal oriented to the first stable orientation state to a third stable orientation state and orienting the ferroelectric smectic liquid crystal oriented to the second stable orientation state to a fourth stable orientation state; (c) means for applying a first electric field capable of orienting the ferroelectric smectic liquid crystal to the one side of the stable orientation state and orienting the other stable orientation state selectively depending on an information input; and (d) means for detecting an optical difference between light rays having passed through the ferroelectric smectic liquid crystal oriented to the third stable orientation state and light rays having passed through the ferroelectric smectic liquid crystal oriented to the fourth stable orientation state.

REFERENCES:
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patent: 4712873 (1987-12-01), Kanbe et al.
patent: 5715688 (1987-12-01), Harada et al.
N. A. Clark & S. T. Lagerwall, "Submicrosecond Bistable Electro Optic Switching in Liquid Crystals", Appl. Phys. Lett., vol. 36, No. 11, 6/1/1980.
P. H. Lippel & C. Y. Young, "Observation of Optically Induced Molecular Reorientation in Films of Smectic C Liquid Crystals", Appl. Phys. Lett., vol. 43, No. 10, 11/1983.

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