Optical data card servo writer
US6339569B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1999 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Apr 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/53
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention discloses an optical servo writer. The optical servo writer includes an optical pickup head for rotationally moving over and writing servo data in an optical flat data-storage medium. The optical servo writer further includes a clock head for providing clock signals to the pickup head and to write clock signals in the clock disk. The optical servo writer further includes a control circuit for controlling The optical pickup head for writing the servo data on The optical flat data-storage medium. The optical servo writer further includes a servo pattern layout circuit for controlling The optical pickup head for writing the servo data on The optical flat data-storage medium with predefined servo patterns. The optical servo writer further includes a derived index control circuit for deriving indices from a fixed index provided on The optical flat data-storage medium. The optical servo writer further includes a fixed index and clock track circuit for providing a fix index and a clock signal for controlling The optical pickup head for writing the servo data on The optical flat data-storage medium. The optical servo writer further includes a head move circuit for controllin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.