Optical information recording-reproducing apparatus for effecting recording/reproduction of information by use of a plurality of light spots
US6144626A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1997 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Dec 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical information recording-reproducing apparatus, a spot for recording and a plurality of spots for reproduction irradiate, from an optical head, an information recording medium having a plurality of tracks and having address information recorded at the head of each track. The plurality of light spots are caused to scan the plurality of information tracks of the recording medium at one time to thereby record information or reproduce recorded information. Further, in the apparatus, such determination is made, on the basis of the address information reproduced by a predetermined preceding one of the plurality of spots for reproduction, as to whether the track on which the spot for recording or the spots for reproduction are positioned is a target track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.