Patent · US Expired

Optical data storage apparatus and method utilizing an amorphous polymer which exhibits photochromic properties

US5023859A · kind A · utility

36Cited by

2References

30Claims

0Family size

Assignee

Rohm GmbH Chemische Fabrik · DE

Inventors

Manfred Eich · Frankfurt am Main, DE
Norbert Rau · Ober-Ramstadt, DE
Joachim H. Wendorff · Marburg, DE

Key dates

Filing date	Mar 30, 1989
Grant date	Jun 11, 1991
Priority date	—
Expiry date	Mar 30, 2009

Classification

Technology area (CPC G)Physics
CPC primaryG11B11/00
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A device for reversible optical data storage, comprising polymer film, the film comprising an amorphous polymer capable of photochromic isomerization, whereby data is reversibly stored in said polymer film and may be read by illuminating the isomerized polymer film with a light source.

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