不匹配介质三层漫射方程的时间分辨漫反射  

Time Resolved Diffuse Reflection of Three-Layered Mismatched Media Diffusion Equation

作　　者：王喜昌[1] 宋东草[1] 宫彦军[1] 吴振森[2] 

机构地区：[1]烟台大学光电信息技术学院,烟台264005 [2]西安电子科技大学物理系,西安710071

出　　处：《光学学报》2005年第9期1254-1259,共6页Acta Optica Sinica

基　　金：国家自然科学基金(60371020)资助课题

摘　　要：生物体的表面组织是一个不匹配的多层介质,大多数研究人员研究匹配介质的漫射方程,将组织表面看作折射率相同的介质。为更好的理解光在生物体内的传播,建立了不匹配条件的三层半无限厚频域方程的解;并对频域进行傅里叶变换,计算出时域的时间分辨漫反射。为了验证此的理论,使用蒙特卡罗方法进行仿真研究,结果表明该理论研究不仅和蒙特卡罗方法高度一致,而且还可以解决两层不匹配介质模型。A tissue is multi-layered mismatched medium, but many investigators only study the diffusion equation of matched medium, they take the tissue as media with the same refractive index. In order to understand the light transport in tissue, the solution of the diffusion equation of a three-layered mismatched medium in frequency domain is set up. Through Fourier transform, the time-resolved reflectance is computed. The time-resolved reflectance between the solution of three-layered mismatched media diffusion equation and Monte-Carlo simulation are compared. The result shows the method not only accords with the Monte-Carlo simulation, but also can solve the problem of a two-layered mismatched turbid media model.

关 键 词：医用光学和生物技术 不匹配介质 漫射方程 时间分辨漫反射 

分 类 号：O439[机械工程—光学工程]