Leung Alfred B, Suh Kwang I, Ansari Rafat R
NASA Glenn Research Center, Cleveland, Ohio 44135, USA.
Appl Opt. 2006 Apr 1;45(10):2186-90. doi: 10.1364/ao.45.002186.
The noninvasive optical technique of dynamic light scattering (DLS) is routinely used to characterize dilute and transparent submicrometer particle dispersions in laboratory environments. A variety of industrial and biological applications would, however, greatly benefit from on-line monitoring of dispersions under flowing conditions. We present a model experiment to study flowing dispersions of polystyrene latex particles of varying sizes under varying flow conditions by using a newly developed fiber-optic DLS probe. A modified correlation function proposed in an earlier study is applied to the analysis of extracting the size and velocity of laminar flowing particulate dispersions. The complementary technique of laser Doppler velocimetry is also used to measure the speed of moving particles to confirm the DLS findings.
动态光散射（DLS）这种非侵入式光学技术通常用于在实验室环境中表征稀释且透明的亚微米级颗粒分散体。然而，各种工业和生物应用将极大地受益于对流动条件下分散体的在线监测。我们通过使用新开发的光纤DLS探头，开展了一项模型实验，以研究在不同流动条件下不同尺寸的聚苯乙烯胶乳颗粒的流动分散体。在早期研究中提出的一种修正相关函数被应用于分析层流颗粒分散体的尺寸和速度。激光多普勒测速这一辅助技术也用于测量移动颗粒的速度，以确认DLS的研究结果。
