Optical recording apparatus having improved erasing capability
US4953150A · kind A · utility
7Cited by
9References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Feb 2, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording apparatus is disclosed in which a recording medium is scanned by a beam of light to record information on the recording medium, to reproduce the recorded information and also to erase the recorded information. The beam spot formed on the recording medium for erasing has a larger spot width measured in the direction perpendicular to the scan direction than that of the beam spot for recording.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.