Cross-track tilt error compensation method for optical disc drives
US5627808A · kind A · utility
19Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1996 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Feb 21, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for deriving a track offset signal to be applied to a tracking error signal particularly adapted for use with a disc drive having a servomechanism and actuator for positioning a read or write spot on a track of a disc in response to the tracking error signal is disclosed. The method includes determining a signal representation of the focus height as a function of disc radius, and differentiating the focus height signal to derive a cross-track tilt signal, applying the cross-track tilt signal to a transform which produces a track offset signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.