Method and apparatus for recording information in which the average power of a pulse is adjusted according to control data
US6678228B1 · kind B1 · utility
18Cited by
9References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 29, 2000 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Feb 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0062
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of and apparatus for recording information are disclosed, which obviate the problem that the average power of the middle pulse chain cannot be controlled simply by controlling the two pulse levels of the middle pulse chain in an energy beam for recording the information. The energy beam is multi-pulsated and radiated on the recording medium for forming a recording mark. The average power of the middle pulse chain is measured and set to a predetermined value. As a result, the average power of the first pulse, the middle pulse chain and the last pulse of the multi-pulse chain can be accurately controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.