Optical data storage system with focus and tracking error correction
US6738322B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Mar 27, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosed device is directed towards an optical data storage system. The optical data storage system comprises an optical medium including a servo plane and at least one data plane. A first laser is positioned to generate a servo laser beam and address the servo plane with a first servo focus spot. A second laser is positioned to generate a read-write laser beam and address the data plane with a second read-write focus spot. A first servo system is associated with the first laser and is configured to provide focus and tracking error correction according to servo information associated with the servo plane. A second servo system is associated with the second laser and is configured to provide focus and tracking error correction according to servo information associated with the data plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.