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、非均匀弥散系的均匀化近似及透射比误差等对反演结果的影响 Combined with the exact Mie scattering theory and K-K of optical constant dispersion, the optical constants (complex refractive index) of the particles are retrieved by using the transmittance spectra of the dilute phase and non-uniform particle dispersion systems with a certain particle size distribution. The multi-value of the inverse problem method is studied. The application range of the method is discussed. The influence of the deviation of the particle size distribution function, the homogenization approximation of the heterogeneous dispersion system and the transmission error on the inversion results is analyzed