Optical information recording medium
US5793741A · kind A · utility
7Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Apr 22, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10578
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To present a stable tracking signal with less change, in a recording medium possessing a discontinuous control information recording region of track groove and a data region by a continuous track. The track pitch of a preliminarily recorded control information pit portion region 3 is set larger than the track pitch of a data recording region 2 which is a continuous groove in a disk 1, and the tracking signal modulation degree of the both regions is nearly same, so that stable recording and reproducing may be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.