Optical pickup and optical disk apparatus
US7768879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2007 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Jan 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0956
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pickup includes a lens holder holding an objective lens for converging a light beam on a signal recording layer of an optical disk; elastic support members supporting the lens holder such that the lens holder can freely move in three driving directions, i.e., a tracking direction, a focusing direction, and a tilting direction; a pair of coil units attached to two sides of the lens holder, the two sides being spaced in a tangential direction orthogonal to the focusing direction and tracking direction; and a pair of magnets arranged to face the corresponding coil units. Each coil unit includes a tracking coil, a focusing coil, and a tilting coil for driving the lens holder in the three driving directions. The focusing coil and the tilting coil are formed by winding a focusing conductor of the focusing coil and a tilting conductor of the tilting coil together in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.