Method and apparatus for recording and reproducing information by intermittent light emission from laser light source
US5189659A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Mar 26, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and a method for recording and reproducing an information signal onto an optical recording medium are disclosed. The apparatus includes a laser light source for radiating a laser beam onto the optical recording medium, a laser driver for driving the laser light source and a device for moving the medium relative to the laser beam. The laser driver controls the laser light source to selectively perform continuous light emission or intermittent light emission with a sufficiently higher frequency than that of the information signal during reproducing. By adopting the light intermittent emission of the light source, the formation of pits with some errors can be prevented and the reliability of the recording and reproduction can be enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.