Optical scanning device
US6256285A · kind A · utility
10Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1998 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Nov 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanning device is described which can scan a record carrier by a radiation beam. A dividing element directs radiation reflected from the record carrier to a detection system. The detection system includes at least three detectors. The dividing element has at least three gratings, each forming a sub-beam directed to one of the detectors. The longest dimension of each detector is substantially perpendicular to the bisector of the appertaining sector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.