Abstract
A method of clarifying bioaerosol particles is proposed based on T-matrix.
Size and shape characterizations are simultaneously acquired for individual
bioaerosol particles by analyzing the spatial distribution of scattered light. The
particle size can be determined according to the scattering intensity, while shape
information can be obtained through asymmetry factor (AF). The azimuthal
distribution of the scattered light for spherical particles is symmetrical, whereas
it is asymmetrical for non-spherical ones, and the asymmetry becomes intense with
increasing asphericity. The calculated results denote that the 5o-10o scattering
angle is an effective range to classify the bioaerosol particles that we are
concerned of. The method is very useful in real-time environmental monitoring of
particle sizes and shapes.
© 2011 Chinese Optics Letters
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