Patent · US Expired

Device for reversible optical data storage using polymeric liquid crystals

US5024784A · kind A · utility

25Cited by

20References

16Claims

0Family size

Assignee

Rohm GmbH Chemische Fabrik · DE

Inventors

Manfred Eich · Frankfurt am Main, DE
Joachim H. Wendorff · Marburg, DE

Key dates

Filing date	Jul 8, 1987
Grant date	Jun 18, 1991
Priority date	—
Expiry date	Jul 8, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG11B7/0065
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A device for reversible optical information storage with a polymeric liquid crystalline storage medium, with the storage medium consisting of a macroscopically oriented film of a liquid crystalline polymer that contains photochromic groups, and with the information being stored by local disorientation of the molecules induced by photoisomerization by means of a selectively acting light source.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.