Optical scanning device
US7742381B2 · kind B2 · utility
0Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2004 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Oct 17, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/13727
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to an optical scanning device for scanning in a first mode a first information layer (111) of an information carrier and in a second mode a second information layer (112) of the information carrier. The optical scanning device comprises a radiation source (101) for generating a radiation beam (102), an objective system (105) for focusing an entrance beam on an information layer and an optical element (103) arranged between the radiation source and the objective system, for converting said radiation beam into a diverging entrance beam in the first mode and a converging entrance beam in the second mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.