散射介质中层间杂质检测效率的影响因素及分析  

Influential factors and analysis of detecting buried trash in scattering media

作　　者：周飞[1] 丁天怀[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《物理学报》2010年第12期8451-8458,共8页Acta Physica Sinica

基　　金：江苏省科技攻关计划(批准号:BE2007056)资助的课题~~

摘　　要：散射介质中层间杂质检测是一个非常重要的研究课题.改进现有的Monte Carlo方法,模拟大量光子在散射介质中的传输,得到入射光强、杂质埋藏深度、介质折射率、介质散射系数和各向异性因子对光学透反射成像法检测层间杂质效率的影响规律.结果表明,入射光强、杂质埋藏深度和介质折射率对透反射成像检测结果均有影响,且影响规律相似.增加入射光强、减小杂质埋藏深度或减小介质折射率均可提高反射光成像的检测效率;增大入射光强、减小介质折射率、减小介质散射系数或增大各向异性因子均可提高透射光成像的检测效率.这些规律对散射介质中层间杂质检测具有一定指导意义.Detection of buried trash in scattering media is a very important research project.Detection efficiency is influenced by several imaging parameters,such as incident light intensity,trash buried depth,medium refractivity,medium scattering coefficient and medium anisotropic factor.Firstly,current Monte Carlo algorithm is revised.Secondly,influential laws of those parameters are researched by simulating a great number of photons propagating in a scattering medium.The results indicate that light intensity,trash buried depth and medium refractivity greatly affect both reflection and transmission imaging results;and their influential laws are similar.Detection efficiency of reflection imaging can be improved by increasing light intensity,reducing trash buried depth or medium refractivity.Detection efficiency of transmission imaging can be improved by increasing light intensity,reducing medium refractivity and scattering coefficient,or increasing anisotropic factor.These conclusions have universal significance of guidance in the detection of buried trash in scattering media.

关 键 词：散射介质 层间杂质 MONTE CARLO方法 透反射成像 

分 类 号：O436.2[机械工程—光学工程]