Method of writing, reading and erasing information
US5432032A · kind A · utility
0Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1993 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Aug 23, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.