Characterization of turbid medium through diffusely backscattering polarized light with matrix calculus-II

2004 International Networking and Communication Conference Pub Date : 2004-06-11 DOI:10.1109/INCC.2004.1366589

S. Firdous, M. Ikram

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引用次数: 6

Abstract

A diffusely backscattered polarized beam of laser radiation from a turbid medium has been characterized by optics calculus. The Stokes and Mueller parameters of polarized light are represented as a column matrix and the optical turbid medium as a 4/spl times/4 matrix. The tissue like turbid phantom system is considered homogeneous and the scattering medium contains one kind of randomly distributed asymmetric particles. We use polarized light from a He-Ne laser (/spl lambda/=632.5 nm) focused on the scattering medium. Different polarization components of backscattered light are obtained by varying the polarization state of the incident laser light and the analyzer configuration. The calculation of the 16 elements of the output Mueller matrix shows that theoretically only seven elements of backscattered light are independent and the remaining nine can be calculated through a symmetry relation. It is also confirmed through experiments. The matrix calculus concept for diffusely backscattered light fully characterizes the turbid medium. The experimental and theoretical results are in good agreement.

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基于矩阵演算的混浊介质扩散后向散射偏振光表征

用光学演算方法对混浊介质中激光辐射的后向散射偏振光束进行了表征。偏振光的Stokes和Mueller参数表示为柱矩阵，光学混浊介质表示为4/spl × /4矩阵。认为类组织浊影系统是均匀的，散射介质中含有一种随机分布的不对称粒子。我们使用He-Ne激光器(/spl λ /=632.5 nm)的偏振光聚焦在散射介质上。通过改变入射激光的偏振态和分析仪的配置，可以得到不同的后向散射光偏振分量。对输出Mueller矩阵16个元素的计算表明，理论上背散射光只有7个元素是独立的，其余9个元素可以通过对称关系计算出来。实验也证实了这一点。漫射后向散射光的矩阵演算概念充分表征了浑浊介质。实验结果与理论结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2004 International Networking and Communication Conference

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