Selectively variable circularly dichroic filtering method

Details Selectively variable circularly dichroic filtering method Selectively variable circularly dichroic filtering method

1975-03-26

1976-05-18

Bauer, Edward S.

350160LC, G02F 113

Patent

active

039573478

ABSTRACT:
The optical transitions of extrinsically optically active soluble and insoluble materials become circularly dichroic when in contact with twisted nematic liquid crystalline compositions. The intensity of circular dichroism induced in the normally extrinsically optically active materials in contact with twisted nematic liquid crystalline compositions having dielectric anisotropy is selectively varied by application of an electrical field. The relative amounts of right handed and left-handed circularly polarized light in elliptically polarized light is thereby selectively variably altered, including the selective production of circularly polarized light.

REFERENCES:
patent: 3780307 (1973-12-01), Saeva

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