Measurement and Analysis on Optical Characteristics of Aspergillus oryzae spores in Infrared Band

摘要

Spore is an important part of bioaerosols.The optical characteristics of spores are crucial parameters for study on bioaerosols.The reflection within the waveband from 2.5 to 15 μm are measured by squash method. Based on the measured data, complex refractive indices of Aspergillus oryzae spores within the waveband from 3 to 5 μm and 8 to 14 μm are calculated by using Krames-Kronig (K-K) relationship.Then,the mass extinction coefficients of Aspergillus oryzae spores within the waveband from 3 to 5μm and 8 to 14μm are obtained by utilizing Mie scattering theory, and the results are analyzed and discussed. The average mass extinction coefficient of Aspergillus oryzae spores is 0.51 m~2/g in the range of 3 to 5μm, and 0.48m~2/g in the range of 8 to 14μm. Compared with common inorganic compounds, Aspergillus oryzae spores possess a good extinction performance in infrared band.