Particle shape as revealed by spectral depolarization

Donald D. Duncan; Michael E. Thomas

doi:10.1117/12.760511

22 February 2008 Particle shape as revealed by spectral depolarization

Donald D. Duncan, Michael E. Thomas

Proceedings Volume 6864, Biomedical Applications of Light Scattering II; 68640G (2008) https://doi.org/10.1117/12.760511
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

Remote detection of airborne biological agents is a problem of contemporary interest. At issue is the discrimination of scatter from such harmful species and the scatter from naturally occurring particles such as hydrosols, pollen, and dust. The feature that our detection scheme attempts to exploit is that the species of interest typically have a characteristic size and shape that produce a unique signature in the depolarization of the scattered light. Through the use of T-matrix calculations we demonstrate the effect and show processing algorithms for quantifying and interpreting the measurements. Simulations suggest that it is possible to retrieve an estimate of the aspect ratio from a measurement of the spectral behavior of the linear depolarization in either the forward-scatter or back-scatter regime.

Citation Download Citation

Donald D. Duncan and Michael E. Thomas "Particle shape as revealed by spectral depolarization", Proc. SPIE 6864, Biomedical Applications of Light Scattering II, 68640G (22 February 2008); https://doi.org/10.1117/12.760511

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