Lidar Polarization discrimination of pollens

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Authors
  1. Cao, X.
  2. Bernier, R.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN);LES INSTRUMENTS OPTIQUES DU ST-LAURENT INC, MIRABEL QUE (CAN)
Abstract
Aerosols or solid targets may have an effect on the polarization of the light scattered by them. The depolarization, by such particles or objects, of the light transmitted by a lidar system may be used as a signature by which these objects can be identified and discriminated against. This report is about the application of the RDDC-Valcartier polarization lidar system to the problem of discriminating between various bioaerosols, here namely pollens. For the first time to our knowledge, this technique has been applied to a great number of different bioaerosols, here 27. The development and application to the experimental data of the statistical tool named Mahalanobis distance has allowed to demonstrate that the polarization lidar technique renders possible the discrimination between bioaerosols (pollens). The work reported herein also addresses the question of whether the use of only one kind of polarization (be it circular or linear) is sufficient or if both polarizations are required for a complete discrimination among randomly distributed particles. This report concludes that only one polarization is sufficient.

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Report Number
DRDC-VALCARTIER-CR-2011-237 — Contract Report
Date of publication
01 Mar 2011
Number of Pages
90
DSTKIM No
CA037887
CANDIS No
537747
Format(s):
Electronic Document(PDF)

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