Method of inscribing and readout of information in an information storage layer
US5623475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Mar 15, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method and a corresponding device for inscribi reading, and erasing information from an information storage layer through use of an electrical field. The information storage layer includes a polarisable polymer film for an active layer. The dipoles are initially oriented in a unipolar manner. Inscription of the information is effected by the application of an opposing electrical field to the active layer. Readout of the different polarisation conditions is effected optically, the phase position of the emitted light of the optical second harmonic being detected by an interferometric process. The information on the storage layer may be deleted by an electrical polarisation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.