Information recording and reproducing apparatus provided with means for adding to a tracking signal offset corresponding to the positional deviation of a recording spot and a reproducing spot
US5293366A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1993 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Apr 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for effecting the recording and reproduction of information on an information track on a recording medium, includes a device for applying a first light spot to the information track to thereby record information, a device for applying a second light spot to the information track to thereby reproduce the information, a device for moving the recording medium relative to the first and second light spots in the lengthwise direction of the information track, a detector for detecting a tracking signal from the reflected light of the second light spot by the recording medium, a tracking controller for moving the first and second light spots in the tracking direction orthogonal to the lengthwise direction of the information track in conformity with the tracking signal, and a device for providing to the tracking signal an offset corresponding to the positional deviation between the center of the first light spot and the center of the second light spot in the tracking direction, during the recording of the information. A method of effecting the recording and reproduction of information by the use of the apparatus described above is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.