光散射粒度测量中采用Fraunhofer衍射理论或Mie理论的讨论  

Discussion of Fraunhofer DiffractionTheory and Mie′s Theory inParticle Sizing

作　　者：徐峰[1] 蔡小舒[1] 赵志军[1] 沈嘉琪[1] 

机构地区：[1]上海理工大学颗粒与两相流测量技术研究所,上海200093

出　　处：《中国粉体技术》2003年第2期1-6,共6页China Powder Science and Technology

基　　金：国家自然科学基金资助课题;编号:50176033。

摘　　要：从理论和实验两方面出发,讨论了颗粒的折射率对光能分布及粒径分布反演结果的影响,同时给出了衍射理论的完整适用条件及基于衍射理论的粒度仪的最佳光靶尺寸。The Fraunhofer diffraction theory(FDT) is widely applied in particle sizing.Through theoretical and experimental comparison,the effects of refractive index on energy distribution falled in photodetector are discussed.And combined with some conclusions drawn out by other researchers,the confining factors of FDT are presented.As a result,we draw out its whole application range for particle measuring and the best lightcollectionangle for particle sizer based on FDT.

关 键 词：颗粒测量 衍射理论 MIE理论 

分 类 号：O436[机械工程—光学工程]