Method of detecting light spot control signal
US4563760A · kind A · utility
4Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1982 |
| Grant date | Jan 7, 1986 |
| Priority date | — |
| Expiry date | Jul 22, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0941
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of detecting a light spot control signal is disclosed in which, when information is reproduced from an optical disk for optically recording information, a signal level obtained at a high-reflectivity portion of the optical disk is taken out of a signal reproduced from the optical disk, and is used as a control signal, which controls a light spot so that it tracks information stored in the optical disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.