小角前向散射测粒仪探测器偏心对颗粒粒径测量的影响

基于Mie散射理论的小角前向散射激光测粒技术已广泛应用于各种领域。在该测粒技术中要求光电探测单元中心与入射光轴严格对中，以保证测得的散射光能分布及所得粒径分布的准确性，然而在实际测量中很难保证精确对中。利用Mie散射理论，通过模拟计算研究对中不良（主要是偏心）对测量结果的影响，并对结果进行了分析。

The Influence of the Eccentricity of the Small-Angle Forward Scattering Laser Particle Sizer

Based on the classical Mie scattering theory, the technology of the small-angle forward scattering laser particle sizer has been widely used in various fields. In order to ensure the accuracy of the measured scattering light energy distribution and the particle size distribution, the center of photoelectric detection unit and incident optical axis must strictly centring. However it is very difficult in actual measurement. Based on the Mie scattering theory, the simulations on the influence of the bad centring （mainly eccentric） are shown, and the results are analyzed.