Optical pick-up objective driving apparatus
US5191484A · kind A · utility
9Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1992 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Jan 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0935
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pick-up objective lens driving apparatus comprises a rectangular moving member mounted for movement relative to an iron-core member in rectilinear focusing and tracking directions, respectively. The moving member carries focusing and tracking coils, and a lens. Magnetic pieces are disposed at respective corners of the moving member in opposing spacial relationship to magnetic plates of the iron core member to create a restoring force which biases the moving member to a pre-set position. The lens is mounted over a center of weight of the moving member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.