Aerodyne Research, Inc., Billerica, Massachusetts 01821-3976, USA.
Opt Lett. 2012 Sep 1;37(17):3654-6. doi: 10.1364/OL.37.003654.
The particle scattering asymmetry parameter of an ensemble of submicrometer particles, as well as the complete scattering phase function (angular distribution), is determined by measuring the Doppler spectrum of the scattered light. No calibration is required. The monitor incorporates a 532 nm laser with long coherence length, an integrating sphere to collect the scattered light, and a heterodyne (interferometric) detection scheme. Measurements of monodisperse polystyrene latex spheres and polydisperse ammonium sulfate particles indicate that the measured value of the asymmetry parameter is generally within ±0.03 of that calculated using Mie theory.
通过测量散射光的多普勒光谱，可以确定亚微米粒子的粒子散射不对称参数以及完整的散射相函数（角分布）。无需校准。该监测仪采用具有长相干长度的 532nm 激光、积分球收集散射光以及外差（干涉）检测方案。对单分散聚苯乙烯乳胶球和多分散硫酸铵粒子的测量表明，不对称参数的测量值通常在使用 Mie 理论计算的值的±0.03 范围内。
