求非均匀体系微粒光学常数的透射法  

A TRANSMISSION METHOD FOR DETERMINATION OF OPTICAL CONSTANTS OF SMALL PARTICALS IN POLYDISPERSION

作　　者：阮立明[1] 余其铮[1] 谈和平[1] 

机构地区：[1]哈尔滨工业大学动力工程系

出　　处：《红外与毫米波学报》1996年第1期43-49,共7页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金;博士点基金

摘　　要：结合精确Ｍｉｅ散射理论及光学常数色散Ｋ－Ｋ关系，利用具有某一粒径分布的稀相、非均匀微粒弥散系的透射比光谱，反演微粒的光学常数（复折射率）．研究了反问题方法的多值性，并讨论了该方法的适用范围，分析了粒径分布函数偏差。A technique was presented, which deduces the optical constants (the complex refractive indices) of small particles from the measured transmittance spectrum of a dilute polydispersion,by use of the precise Mie scattering theory and the Kramers Kronig dispersion relation. The multi valued characters and the suitable range of applications were discussed. The influence of the size distribution and the transmittance was thoroughly investigated,and it indicates that the errors of the size distribution and the transmittance will influence seriously the absorption index k, but weakly the refractive index n.

关 键 词：散射理论 光学常数 复折射率 透射法 

分 类 号：O435.2[机械工程—光学工程]