Optical disk capable of recording information on both groove and land tracks
US5508995A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1994 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | Jul 15, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10578
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium includes a groove track and a land track provided on a resin substrate. Each of the tracks is divided into a plurality of sectors for every turn. Each sector has an ID region, a servo region, and an information region. A pit in the ID region is formed so as to span across both the groove track and the land track. The first wobble pit and the second wobble pit are provided on both sides of the center line of each track, and they are spaced with each other in the direction of the track. Thus, since a larger width of the pit can be provided, production of the optical recording medium can be facilitated. Moreover, since the center of the track can be detected accurately by the first and second wobble pits, accurate tracking control can be performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.