Focusing servo in an optical disk drive
US5384762A · kind A · utility
10Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1994 |
| Grant date | Jan 24, 1995 |
| Priority date | — |
| Expiry date | Feb 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0941
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk drive includes a gain control for controlling the gain of a focus servo loop in response to the seek velocity of an optical head. At a low seek velocity, the focus servo gain is reduced to minimize the influence of beam scattering on the groove of an optical disk onto a focusing error signal (FES) and a tracking error signal (TES).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.