Optical multi-channel digital disc storage system
US4094010A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | May 13, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/218
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical storage system for the simultaneous or random storage of digital information in a plurality of channels, comprising a rotating storage disc which is scanned by a light beam. The digital information of each channel is stored in points along a spiral track comprising interruptions. A concentrical guide track is associated with each channel. The light beam being focussed onto both tracks of each channel for optical addressing. The light beams of all channels are controlled via deflection systems so that, during the interruptions, they are briefly directed onto the guide tracks while following the spiral tracks. From the radial deviation of the moving disc, measured by way of a detector system, control signals are derived by the deflection systems to compensate for undesired radial motions of the spiral-shaped tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.