Optical sensing with photon density waves:: Investigation of model media
Optical sensing with photon density waves:: Investigation of model media
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DOI：
10.1039/b308630e
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发表时间：
2003-12-01
影响因子：
3.3
通讯作者：
Schael, F
中科院分区：
文献类型：
--
作者：
Reich, O;Löhmannsröben, HG;Schael, F
用频域光子密度波的研究可以阐明混浊介质的吸收和散射特性。频率超过1ghz的强度调制光的时空传播可以用玻尔兹曼输运方程的PI近似来描述。在这项研究中，我们建立了适当选择浊度模型介质的要求，并表征了异硫蓝作为吸收剂和聚苯乙烯珠作为散射剂的混合物。对于这些模型介质，在较大的吸收体和散射体浓度范围内的吸收和降低散射系数的独立确定是用频率域光子密度波光谱仪在不同调制频率下采用强度和相位测量来证明的。
Investigations with frequency domain photon density waves allow elucidation of absorption and scattering properties of turbid media. The temporal and spatial propagation of intensity modulated light with frequencies up to more than 1 GHz can be described by the PI approximation to the Boltzmann transport equation. In this study, we establish requirements for the appropriate choice of turbid model media and characterize mixtures of isosulfan blue as absorber and polystyrene beads as scatterer. For these model media, the independent determination of absorption and reduced scattering coefficients over large absorber and scatterer concentration ranges is demonstrated with a frequency domain photon density wave spectrometer employing intensity and phase measurements at various modulation frequencies.