Delfino I, Lepore M, Indovina P L
Dipartimento di Scienze Fisiche, Istituto Nazionale per la Fisica della Materia, Università di Napoli Federico II, 80100 Napoli, Italy.
Appl Opt. 1999 Jul 1;38(19):4228-36. doi: 10.1364/ao.38.004228.
A detailed investigation of the use of time-resolved trasmittance for the optical characterization of scattering media by use of different analytical solutions to the diffusion equation has been performed. A femtosecond Ti:sapphire laser working at 800 nm and a streak camera with a time resolution of a few picoseconds were employed. Different latex and Intralipid solutions as well as biological samples were investigated. Reduced scattering coefficients were evaluated, and good agreement with the Mie predictions was found. An estimation of the order of magnitude of the absorption coefficient was obtained for the low-absorbance samples examined. These studies confirm experimentally that time-resolved trasmittance can be employed usefully for evaluating s values of thick scattering samples when a proper theoretical description that takes into account realistic boundary conditions is used.
通过对扩散方程使用不同的解析解，对利用时间分辨透射率进行散射介质光学表征的应用进行了详细研究。采用了工作在800nm的飞秒钛宝石激光器和具有几皮秒时间分辨率的条纹相机。研究了不同的乳胶和脂肪乳剂溶液以及生物样品。评估了约化散射系数，发现与米氏理论预测结果吻合良好。对于所检测的低吸收样品，获得了吸收系数数量级的估计值。这些研究通过实验证实，当使用考虑实际边界条件的适当理论描述时，时间分辨透射率可有效地用于评估厚散射样品的s值。
