Method of recording and reproducing data on a disk
US5636194A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10194
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In recording data on a rewritable optical disk with a mark edge recording method, the occurrence of edge shift is compensated for. As a first power of a laser beam is greater than a second power, start and termination ends of each mark are produced by irradiation of the first power and a remaining intermediate portion of the mark is produced by irradiating the first and second powers alternately at equal intervals of a predetermined duration which is shorter than a period of a clock pulse. Also, the start and termination ends of the mark are specifically dislocated corresponding to a length of the mark and lengths of two neighbor spaces before and after the mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.