胶体中布朗粒子简谐束缚下准直高斯光束的动态光散射  

The Dynamic Light Scattering of Collimated Gaussian Beam under Simple Harmonic Binding by Brownain Particle in Colloid

作　　者：朱拓[1] 张逸新[1] 倪晓武[2] 陆建[2] 

机构地区：[1]无锡轻工大学数理学科部 [2]南京理工大学

出　　处：《光电工程》1998年第4期48-54,共7页Opto-Electronic Engineering

摘　　要：在将散射粒子间的相互作用看作简谐力、入射光为准直高斯光束、散射光为理想平面光波的模型下研究了胶体溶液中布朗粒子的统计特性并求解了动态光散射的散射光电场强度的自相关函数；讨论了新模型下所得结论与原先模型下所得结论的不同之处及简化为相同结论的近似条件；并将所得结果应用于存在外电场的情况下，得到了相应的散射光电场强度的自相关函数，我们认为所述方法和结论可直接用于实验研究之中，并可推广到多分散性系统的定量分析之中。The statistic characteristics of Brownain particle in colloid solution are investigated and the autocorrelation function of the scattered light electric field of the dynamic light scattering is solved only when we regard the interaction of the scattered particle as a simple harmonic force, the incident light as a collimated Gaussian beam and the scattered light as an ideal plane wave.The different points between the conclusion of the new model and the conclusion of the original model are discussed and they have been simplified as the approximate conditions of the same conclusions. With the obtained results have been applied to the occasion where the external electric field exists,the corresponding autocorrelation function of the scattered light electric field is botained.The described method and conclusion can be directly applied to the experiments and research work,and can be popularized to the quantitative analysis of multiple disperse systems.

关 键 词：光散射 高斯光束 准直光束 自相关函数 布朗运动 

分 类 号：O436.2[机械工程—光学工程]