Optical pickup device having heat radiation means and optical disk apparatus using the same
US7420891B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2005 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Mar 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0933
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pickup device comprises a semiconductor laser that causes outgoing of laser beam used for reproduction and recording of information on an optical disk, and an objective lens that conducts the laser beam outgoing from the semiconductor laser to the optical disk. The objective lens is driven by a yoke, a focusing coil, a tracking coil, etc. These elements are accommodated in a pickup housing. First and second bearing portions supporting the pickup housing to make the same movable are attached to the pickup housing and arranged on both sides with the objective lens therebetween. The yoke is thermally connected to the first bearing portion positioned on an opposite side of the yoke to the semiconductor laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.