Three-dimensional driving arrangement
US4696566A · kind A · utility
33Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0932
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A three-dimensional driving arrangement of an objective lens or the like, which is so arranged that coils for focusing control, tracking control and tangential control in three directions are disposed in one magnetic gap for compact size, while the coils for the tracking control and tangential control are each formed to have a V-shaped cross section, with going passage arms of the coils being disposed in the magnetic gap, but returning passage arms of them being disposed outside the magnetic gap through four slit-like notches formed in a yoke, thus making it possible to drive the objective lens independently in three directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.