Method and apparatus for timing variable optical information recording
US5216657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1992 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Sep 3, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for recording information signals on an optical information recording medium which is reversibly changeable between optically distinguishable states corresponding to an irradiating condition of a bundle of high density energy such as laser beam. The starting point of recording signals is randomly changed, and the thermal history of the recording material by the beam irradiation is averaged and the number of repetition recording times is improved. A delay circuit is provided, and reference recording gate signals are formed on the basis of format signals obtained from a recording medium, and a random delay time is set just thereafter, and the starting point of recording of recording signals is started.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.