Optical information recording apparatus
US4937809A · kind A · utility
17Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1988 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Feb 19, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording apparatus of the type employing a read/write laser adapts the recording light beam to various linear speeds of the recording disk by jointly controlling both the beam power and the duty ratio of the recording signal in accordance with the radial position of the beam spot on the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.