Optical pickup device having a movable-side member driven with a predetermined inclination
US6570828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Jun 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10576
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A skew of an optical pickup device can be adjusted by a movable-side member itself which holds thereon an objective lens. A holder which holds an objective lens is supported by four spring wires such that it can be moved in the focusing direction and the tracking direction of an optical disk. A center of a magnetic circuit which drives the holder is shifted in the outer peripheral side relative to the optical disk. Elastic force of the spring wires of the inner peripheral side is suppressed by increasing the amount of a gel material bonded to the spring wires located on the inner peripheral side of the optical disk as a damping material as compared with the amount of the gel material bonded to the spring wires located on the outer peripheral side. Thus, the holder can be driven by a predetermined inclination in the focusing direction such that the optical axis of the objective lens becomes substantially perpendicular to the signal recording surface of the optical disk in response to the focus height changed due to the skew of the optical disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.