Bulk eraser for optical memory media
US4970711A · kind A · utility
8Cited by
18References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1988 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Feb 5, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0055
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The entire data content of a thermally erasable optical memory medium is erased simultaneously by irradiating the entire signal-retaining layer of the medium with light in such a manner that the signal-retaining layer is preferentially heated over other layers in the medium, particularly other thermo-optically active layers if any are present. The irradiation is most effectively achieved with a flash of light at high intensity and short duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.