Wavelength normalized depolarization ratio lidar
US7339670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2005 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Aug 22, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/4792
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A remote sensing optical system and method is disclosed that permits detection and discrimination of aerosols. The system outputs a plurality of wavelengths and is equipped with a polarization sensitive receiver capable of measuring the scattered energy in two orthogonal polarization states. By normalizing the depolarization to the total energy received and calculating the ratio of normalized depolarization at different wavelengths it is possible to use this ratio to discriminate materials having wavelength dependent depolarization properties. One use is the discrimination of bioaerosols such as anthrax from other airborne particular matter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.