Optical track follower device with sampling
US4535431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1982 |
| Grant date | Aug 13, 1985 |
| Priority date | — |
| Expiry date | Aug 10, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0938
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to devices for optically transcribing in a track carried by a support medium data to be written in or read out. The invention provides a pre-engraved track follower device for a transcription device in which a loop for radial control of the reading spot scanning the track is provided with sampling means taking samples during scanning of nonpost-engraved parts of a pre-engraved track, said scanning corresponding to a data write or read phase. The invention applies more particularly for digital data transcription devices using a single spot for locating a pre-engraved track and since optically writing data therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.