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采用压片法对黑曲霉孢子2.5~15μm波段的反射光谱进行了测量。针对采集的光谱数据,利用Krames-Kronig(K-K)关系对黑曲霉孢子2.5~15μm波段的复折射率进行了计算。然后,根据Mie散射理论求出了2.5~15μm波段黑曲霉孢子质量消光系数,并对结果进行了分析和讨论。分析结果表明,在粒径r=1.2μm时,黑曲霉孢子在2.5~15μm波段的平均质量消光系数为0.68m2/g,随着粒径的增大,平均质量消光系数单调减小;与常见无机物相比,黑曲霉孢子在2.5~15μm波段具有较好的消光性能,而且在保证一定消光性能的情况下,黑曲霉孢子的粒径尺寸要求相对较宽。
The reflectance spectrum of Aspergillus niger spores 2.5 ~ 15μm was measured by using the tabletting method. According to the spectral data collected, the complex refractive index in the 2.5-15 μm band of Aspergillus niger spores was calculated by Krames-Kronig (K-K) relationship. Then, based on the Mie scattering theory, the extinction coefficient of Aspergillus niger spores in the 2.5 ~ 15μm band was calculated and the results were analyzed and discussed. The results showed that the mean mass extinction coefficient of Aspergillus niger spores was 0.68 m 2 / g in the wavelength range of 2.5 ~ 15μm at the particle size of r = 1.2μm, and the average mass extinction coefficient decreased monotonously with the increase of the particle size. Aspergillus niger spores have better extinction performance in the wavelength range of 2.5 ~ 15μm compared with inorganic substances, and the particle size of Aspergillus niger spores is required to be relatively wide in size with certain matting properties guaranteed.