Optical pickup
US6671246B1 · kind B1 · utility
13Cited by
10References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2000 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Apr 27, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/13727
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical pickup is provided which includes a light source, an optical system for converging a laser beam emitted from the light source, and an optical element having a function of increasing a numerical aperture of the optical system, wherein recording and/or reproducing information on a recording medium is performed by using the laser beam from the light source while the optical element is brought in contact with or in close to the recording medium, and the optical element has a contamination-preventing structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.