光子学报, 2006, 35 (6): 0910, 网络出版: 2010-06-03
混浊介质二维后向漫散射穆勒矩阵的测量
Measurement of the Two-dimensional Diffuse Backscattering Mueller Matrix of Turbid Medium
生物光学与光生物物理学 后向漫散射穆勒矩阵 偏振成像 混浊介质 斯托克斯矢量 Biological optics and biophysics Diffuse backscattering Mueller matrix Turbid medium Polarization-imaging Stokes vector
摘要
研制了一套实验系统用于测量混浊介质的后向漫散射穆勒矩阵.在系统中,激光被调制成所需偏振态,聚焦于混浊介质表面.利用CCD相机配合相应的偏振元件,测量入射点周围区域的后向散射光中特定偏振态的能量空间分布,并由测量值计算出介质的后向漫散射穆勒矩阵.描述了系统的组成、测量原理以及方法,分别测量了消偏振分光棱镜的反射穆勒矩阵和浓度1.5%的脂肪乳溶液的后向漫散射穆勒矩阵.实验证明:该系统能够完全消除样品表面镜面反射光的干扰,精确的测量混浊介质的后向漫散射穆勒矩阵;并可望用于生物组织的研究中.
Abstract
A polarization-imaging system was developed to measure the two-dimensional diffuse backscattering Mueller matrix of turbid medium. In the system of a polarized,collimated laser beam was focused to a small point on the medium,and the multiply scattered,diffusely backreflected light around this point was recorded with a CCD camera. The system and the theory of measurement were described in detail in the paper. And then,the specular reflecting Mueller matrix of the non-polarizing beamsplitter and the two-dimensional diffuse backscattering Mueller matrix of a 1.5% Intralipid solution were measured. The result confirms that the system can avoid the specular reflectance of the sample and exactly measure the Mueller matrix of the sample.
胡锐, 邓勇, 鲁强, 骆清铭. 混浊介质二维后向漫散射穆勒矩阵的测量[J]. 光子学报, 2006, 35(6): 0910. Hu Rui, Deng Yong, Lu Qiang, Luo Qingming. Measurement of the Two-dimensional Diffuse Backscattering Mueller Matrix of Turbid Medium[J]. ACTA PHOTONICA SINICA, 2006, 35(6): 0910.