Objective lens drive and optical pickup apparatus
US8111593B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2008 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Jul 30, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0956
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An objective lens drive and an optical pickup apparatus are provided which can be reduced in size. Two tilt coils and two tracking coils are disposed so that among planes defined by the respective coils, a plane perpendicular to a winding direction thereof is parallel to a reference plane defined on a lens holder at a predetermined reference distance or less, and are disposed at such positions as to be symmetrical to each other about a center of gravity of the lens holder. A focus coil is disposed so that among planes defined by the focus coil, a plane perpendicular to a recording surface of an optical disk is parallel to the reference plane at a predetermined reference distance or less relative to the two tilt coils and the two tracking coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.