Method for tracking data in an optical storage medium
US6865142B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2002 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Jul 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for correcting tracking errors in an optical storage medium having multiple tracks arranged in different layers of the optical storage medium, directs a reading spot that is nominally focused on to a track in the optical storage medium, and continually moves the reading spot in axial and radial directions so as to receive a signal having an amplitude which varies according to respective offsets from the track in radial and axial directions. The received signal is used to determine a direction of a respective offset from the track in radial and axial directions, and a location of the reading spot is adjusted accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.