Optical disk device using a recording medium structurally arranged to generate a recording clock
US6125084A · kind A · utility
5Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1998 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Feb 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10521
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high-speed large capacity file system is built in which the track density is improved by applying a highly precise magnetic domain width control technique to a light pulse-irradiated magnetic field modulation magnetooptical disk device which can be overwritten and is suitable for the improvement of the bit density. For the purpose, bipolar magnetic domains having edges of positive and negative polarities with respect to the direction of movement of a light spot are formed and the recording condition is optimized. Normal recording is carried out on the basis of the result of the optimization of the recording condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.