Electro-optical device

Details Electro-optical device Electro-optical device

1988-12-09

1992-06-02

Meyman, John S.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 73, 359 93, 359102, G02F 1133, G02F 11335, G02F 1137

Patent

active

051192160

ABSTRACT:
An electro-optical device which includes a super twisted nematic liquid crystal display cell and a compensating cell disposed between a pair of polarizers. Each of these cells is characterized by a plurality of parameters including refractive index dispersion, refractive index anisotropy, layer thickness and twist angle. At least one of the parameters characterizing the liquid crystal display cell differs in value from the corresponding parameter characterizing the compensating cell.

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H. A. Tarry, "Electricaslly Tunable Narrowband Optical Filter", Electroncis Letters, vol. 11, No. 19, Sep. 18, 1975, pp. 471, 472.

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