Optical pickup device
US6266314A · kind A · utility
19Cited by
14References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1997 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Sep 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pickup device has a single light beam path in which at least one or either of a plurality of kinds of light beams (different from each other in, for example, wavelength) for respective recording densities and/or recording-medium-thicknesses proceeds toward a surface of an optical recording medium and proceeds to a light beam detector after being reflected by the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.