Journal of Atmospheric and Environmental Optics ›› 2018, Vol. 13 ›› Issue (1): 52-58.

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Bioaerosols Polarization Measurement by Short-Range Multi-Wavelength Lidar

YANG Hui1, ZHAO Xuesong2, SUN Yanfei1, WANG Tiedong1, ZONG Junjun1, QING Feng1   

  1. (1 Army Officer Academy of PLA, Hefei 230031, China; 
    2 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2016-09-30 Revised:2016-10-19 Online:2018-01-28 Published:2018-02-06
  • Contact: 杨辉(1974- ) , 男, 四川德阳人, 副教授, 博士, 主要从事生物战剂(气溶胶)、激光雷达和大气环境监测等方面的研究。 E-mail:sanpedroman@163.com
  • About author:杨辉(1974- ) , 男, 四川德阳人, 副教授, 博士, 主要从事生物战剂(气溶胶)、激光雷达和大气环境监测等方面的研究。
  • Supported by:

    Supported by National Natural Science Foundation of China(国家自然科学基金,41375026)

Abstract:

Based on polarization characteristics of non-spherical particles, a short range lidar system for real-time standoff detection of bioaerosols was developed. The system includes two laser sources and depolarization components. Linear polarization purity of the laser beam is 1/500, the polarization and elastic scattering signals are collected by a Cassegrainian telescope. In a semi-closed bioaerosol chamber, 10 kinds of bioaerosol were mixed and interrogated by 355, 532, 1064 nm laser beam sequently. Linear polarization measurements were performed. The results showed that the depolarization ratios are wavelength-dependent, and the identification of bioaerosols can be achieved through the application of Euclidian correlation degree and Mhalanobis distance.

Key words: bioaerosols, multi-wavelength, lidar, depolarization ratio, Mahalanobis distance

CLC Number: