Tilt correction method detecting tilt with same linear velocity as upon actually recording/reproducing at each radial position
US7327656B2 · kind B2 · utility
1Cited by
14References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 13, 2003 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Dec 18, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0956
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Prior to recording/reproducing information to/from an optical disk rotationally driven by a spindle motor, an optical pickup is moved to a plurality of measuring positions set beforehand in a radial direction of the optical disk. A relative tilt between the optical disk and the optical pickup is detected with the spindle motor being rotated so that a linear velocity at each of the measuring positions equals a linear velocity upon actually recording or reproducing the information thereat. The tilt detected at each of the measuring positions is stored as tilt detection data corresponding to each of the measuring positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.