Method of writing, reading and erasing information

Details Method of writing, reading and erasing information Method of writing, reading and erasing information

1993-08-23

1995-07-11

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Erasable imaging

430945, 430 21, 430269, G11B 700

Patent

active

054320321

ABSTRACT:
A method of writing and reading or writing, reading and erasing information in an optical recording medium is provided in which in an optical recording medium an optically active compound which is an inherently chiral dissymmetric olefinic chromophore is subjected to the action of circularly polarized light or is caused to undergo cis-trans isomerization during writing, is subjected to linearly polarized light during reading, and is subjected to linearly or circularly polarized light or light of a wavelength suitable to effect cis-trans isomerization for erasing.

REFERENCES:
patent: 3917481 (1975-11-01), Saeva et al.
patent: 4753861 (1988-06-01), Tsou et al.
patent: 4958087 (1990-09-01), Meijer et al.
patent: 5011756 (1991-04-01), Nikles
patent: 5023859 (1991-06-01), Eich et al.
patent: 5316900 (1994-05-01), Tsujioka et al.
Feringa et al., "Inherently Chiral Olefins", Recl. Trav. Chim. Pays-Bas 97, pp. 249-251 (Oct. 1978).
Feringa et al., "Torsionally Distorted Olefins", J. Am. Chem. Soc. 99, pp. 602-603 (Jan. 1977).

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