High density recording medium with pit width to track pitch ratio in the range of 0.4 to 0.55 for push-pull tracking servo control
US6349085B1 · kind B1 · utility
4Cited by
6References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 16, 1999 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Jul 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10578
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an optical recording medium having formed along recording tracks thereon pits indicative of information signal, a ratio Pw/Tp where Pw is the width of the pit and Tp is the pitch of the tracks is within a range of 0.4 to 0.55. The push-pull method or differential push-pull method is adopted for tracking servo control of the optical recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.