Optical pick-up actuator
US6574052B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2001 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Aug 21, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/093
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pick-up actuator includes a lens holder suspended in a magnetic field by a suspension wire and having tracking and focusing coils and objective lens, a magnet for generating a magnetic field crossing other magnetic field generated by a electric current along tracking and focusing coils so as to drive the objective lens in focusing and tracking directions in suspended state, a frame for supporting the lens holder by the suspension wire, a yoke for securing the frame by a shaft, pairs of tilting coils mounted at both end portion of the frame for driving the lens holder in suspended state by suspension wires by rotating the frame in a predetermined direction on the axis of the shaft, and pairs of tilting magnets arranged so as to correspondingly face the tilting coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.