Movable scanning unit for an optical recording or playback apparatus
US4557564A · kind A · utility
28Cited by
1References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1984 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Jan 13, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/093
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electro-optical device for reading an information disc comprises an optical system which is movable relative to the disc by at least one electro-magnetic actuator. The optical system is supported by elongated members whose length is great relative to their thickness and which are pretensioned in the longitudinal direction by magnets which cooperate with each other via an air gap, enabling the use of very flexible supporting elements, for example guys which have a low resistance to bending and a very low mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.