用简化Mie理论及K—K关系求微粒复折射率的透射法  

A TRANSMISSION METHOD TO DETERMINE COMPLEX REFRACTIVE INDICES OF SMALL PARTICLES BY SIMPLIFIED MIE THEORY AND K-K RELATION

作　　者：余其铮[1] 谈和平[1] 阮立明[1] 苏建良 

机构地区：[1]哈尔滨工业大学动力工程系,黑龙江哈尔滨150006

出　　处：《红外与毫米波学报》1993年第5期340-346,共7页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金及机械工业技术发展基金~~

摘　　要：用简化的Mie散射理论及Kramers-Kronig关系式,从单频透射比光谱反演微粒的复折射率。用较大粒径的碳黑微粒作了模拟计算,结果表明本方法计算比较简单,比现有方法提高了精度,扩大了波长及粒径范围。最后利用红外分光光度计测出的透射比光谱确定了煤粒的复折射率。The complex refractive index of smalll particles is determined from the transmittance spectrum by the use of the Simplified Mie scattering theory and Kramers-Kronig relation. The numerical simulation results for the soot particles with relatively large size show that this method is simple as compared with the existing method. The accuracy of this method is improved and the ranges of wavelength and particle size are expanded. At last the transmittance spectrum of the coal particle cloud is measured by an Infrared spectrometer and its complex refractive index is determined.

关 键 词：微粒 透射比光谱 复折射率 散射 

分 类 号：O482.3[理学—固体物理]