Chinese Optics Letters, 2011, 9 (9): 092901, Published Online: Jun. 20, 2011   

Theoretical studies on bioaerosol particle size and shape measurement from spatial scattering prof iles Download: 870次

Author Affiliations
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
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.

Chunxia Feng, Lihua Huang, Jianbo Wang, Yongkai Zhao, Huijie Huang. Theoretical studies on bioaerosol particle size and shape measurement from spatial scattering prof iles[J]. Chinese Optics Letters, 2011, 9(9): 092901.

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