摘 要：为了研究高浓度状态下颗粒系后向散射规律‚基于 Beer－Lambert 定律、Mie 散射理论及复散射的相关理论建 立了消光－散射衰减模型‚并针对具体算例进行了数值计 算‚给出计算结果。 

关键词：后向散射；颗粒测量；反散射

Abstract：For researching back-scattering disciplinarian of parti cles in high concentration‚the method combining extinction and scattering attenuation is established based on Beer － Lambert law‚Mie′s theory and multiple scattering theory．Some calcula tion are done to show relation between particle size‚concentra tion and back-scattering power． 

Keywords：back-scattering；particle measurement；multiple scat tering