Optical recording medium, recording and reproducing method, and recording and reproducing apparatus using heating pulses which are high-output at leading and trailing ends
US7532556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Sep 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/2595
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An object is to provide a recording and reproducing method of a dyestuff-based, write-once DVD medium which can obtain a good recording waveform at a time of carrying out high linear speed recording. To this end, there are provided a recording and reproducing method and a recording and reproducing apparatus of a dyestuff-based, write-once DVD medium in which each mark other than a shortest length mark is recorded on a recording layer at an optical recording medium formed by having at least a recording layer containing an organic dyestuff on a substrate having a guide groove at which a high-frequency wobble is provided, by using one pulse light at which two places which are a leading portion and a trailing end portion of a heating pulse are made to be high-output for a given time and at which a pulse light power of the leading portion of the heating pulse is greater than a pulse light power of the trailing end portion, and the recording is reproduced by reproducing light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.