弥散体相关散射的体-面平均直径D_(32)的检测  

Determination of volume-surface mean diameter D32 for correlated scattering by dispersoid

作　　者：胡柱国[1] 牛社团 

机构地区：[1]西安交通大学物理系,西安710049

出　　处：《光学学报》1991年第4期369-375,共7页Acta Optica Sinica

摘　　要：本文应用分层模型处理较高浓度的弥散体产生的相关散射。计算各层满足单散射条件时的相函数,求得散射几率函数,利用它再计算前向散射的光能分布;对于较大微粒,按衍射理论计算,建立多重散射模型,应用迭代法计算多重散射的光能量分布;测量了不同浓度的玻璃微珠产生的散射光能量功率谱,将其与模拟计算值作比较,并以上限公布函数作有约束的优化处理,计算了D_(32)。文中用图像分析系统对样品作出二值化图,把统计数据与测量结果作了比较。A ray tracing model is used to deal with correlated scattering by denser dis-persoid. From the computation of phase function of each layer satisfying the condition of single scattering, the probability function of scat bering is obtained,which is then used to calculate the optical energy distribution by forward scattering. The optical energy distribution of multiple scattering is calculated by using iteration based on a proposed multiple scattering model however, for larger particles, the calculation may be based on the diffraction theory. In order to optimize under restrint the upper linit distribution function, the measured values of optical energy spectrum scattered by dispersoid sample of various densities are compared with those obtained by simulation. The optimizing result obtained is used to calculate D32. The experimental results are complred with the statistical data

关 键 词：弥散体 相关散射 粒径 探测 量度 

分 类 号：O436.2[机械工程—光学工程]