Optical disk having a continuous recording track formed of alternating land and groove revolutions
US5848050A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Feb 12, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0901
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical disk having information recording tracks of lands and grooves, the grooves are wobbled in a radial direction of the disk so as to represent rotation information and sector management information, at least one pair of a wobbling part and an unwobbling part arranged one after another are provided every revolution, such that the wobbling parts in the grooves next to each other do not overlap in the radial direction of the disk. Since the wobble parts in the grooves next to each other do not overlap in the radial direction, the wobble data can be obtained regardless of whether a beam spot is tracing a land track or a groove track, and even in a data part of each sector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.