Modulated-retroreflector based optical identification system
US6493123B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/532
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical identification system for identifying a vehicle. The system comprises a laser source for generating a transmitted beam and a reflector in optical communication therewith. The reflector is operative to reflect the transmitted beam to thereby generate a reflected beam. The system further includes a shutter in optical communication with the reflected beam and operative to modulate the polarization of the reflected beam with identification information thereby generating a modulated reflected beam. The optical identification system of the present invention further includes a detector in optical communication with the modulated reflected beam. The detector is operative to pass the modulated reflected beam and decode the identification information modulated thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.