Electrically controlled polarization-independent liquid crystal

Details Electrically controlled polarization-independent liquid crystal Electrically controlled polarization-independent liquid crystal

1990-12-10

1991-12-03

Stoll, Robert L.

Compositions

Liquid crystal compositions

2522994, 359 75, 359 94, C09K 1952, C09K 1956, G02F 113

Patent

active

050698133

ABSTRACT:
In successive zones of a layer of nematic liquid crystal material, the principal axes of at least some of the material in each zone are established orthogonal to the axes of at least some of the material in adjacent zones. By applying a uniform electric field to the zones of the entire layer, an electrically controlled polarization-independent Fresnel lens is achieved.

REFERENCES:
patent: 4037929 (1977-07-01), Bricot et al.
patent: 4190330 (1980-02-01), Berreman
patent: 4904063 (1990-02-01), Okada et al.
patent: 4909626 (1990-03-01), Purvis et al.

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