Color filter

Details Color filter Color filter

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Patent

CA 1168489

6275 ABSTRACT OF THE DISCLOSURE A variable color filter comprising a plurality of differently colored dichroic polarizers, an equal number of voltage responsive twisted nematic liquid crystal cells, and a plane polarizer all arranged along an optical path in a predetermined manner to modify the spectral content of visible light incident to the filter so that the filter transmits any one of a predetermined number of colors whose saturation and hue are related to the voltages applied to the liquid crystal cells.

389747

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