Device for driving optical parts of an optical pickup
US4861138A · kind A · utility
17Cited by
2References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Apr 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0935
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for driving optical parts of an optical pickup comprises a magnet having first and second magnetic pole surfaces, each of the first and second magnetic pole surfaces having adjacent different magnetic poles which generate a magnetic field that is disposed perpendicularly to the magnetic field of the other magnetic pole surface, and first and second coils which oppose corresponding first and second magnetic pole surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.