Method and apparatus for writing on an optical disk with beam spots aligned at an angle to data tracks
US7403465B2 · kind B2 · utility
0Cited by
34References
27Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 14, 2005 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Oct 14, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Data is written on a plurality of data tracks on an optical disk by a plurality of laser beams. The spots illuminated by the beams are spaced apart to prevent thermal interference. The spots are aligned along a line at an angle to the tangent of the data tracks. The angle of the line of spots is determined by an equation using variables that include the track pitch, the minimum distance between spots and the difference in track numbers between tracks being written.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.