Process for the reversible optical storage of data
AssigneeRohm GmbH Chemische Fabrik
InventorsManfred Eich, Joachim Wendorff, Bernd Reck
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Abstract
The invention concerns a process for reversible optical information storage by means of a liquid crystal storage medium, whereby the information is stored in a firm of a liquid crystal side chain polymer in an anisotropic phase by means of locally acting heat source in combination with an electric, magnetic or surfaces active field, through local reorientation.
Claims31
A process for reversible optical information storage which utilizes a device comprising (1) a substrate, and (2) a film comprising a liquid crystal side chain polymer in contact with said substrate, comprising the steps of:
- (a) storing information below the glass temperature of said liquid crystal side chain polymer and within the stable shape retention state of said polymer on said device by locally reorienting said film;
- and
- (b) reading stored information from said device by illuminating said film with coherent monochromatic light.
The process of claims 6 or 7, wherein said heating produces an anisotropic, liquid phase of said liquid crystal polymer.
Dependencies are inferred from the claim text.