Optical pickup system, optical system, and optical information recording medium
US7671312B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 2005 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Nov 2, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides an optical pickup system including a first light source emitting a light flux with a first wavelength; a second light source emitting a light flux with a second wavelength; and a light-converging optical system converging the light flux with the first wavelength from the first light source with a first magnification onto a first reference surface set at a first depth, and converging the light flux with the second wavelength from the second light source with a second magnification onto a second reference surface set at a second depth. The first and second wavelengths, the first and second depths, and the first and second magnifications satisfy: a first condition according to an aberration and a second condition according to a working distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.