MEASUREMENT AND ANALYSIS OF TRANSMISSION MATRICES OF HIGHLY TURBID MEDIA

这个子项目是利用资源的许多研究子项目之一 由NIH/NCRR资助的中心拨款提供。子项目的主要支持 而子项目的主要调查员可能是由其他来源提供的， 包括其它NIH来源。 列出的子项目总成本可能 代表子项目使用的中心基础设施的估计数量， 而不是由NCRR赠款提供给子项目或子项目工作人员的直接资金。 高散射样品的透射矩阵是将入射的复杂单色波场与前向方向上的散射波场相关联的线性变换。 它可以通过用一系列平面波基态照射样品，并快速扫描照射角度以覆盖由数值孔径确定的范围来测量。 一旦记录了矩阵，就可以对其进行分析以推断介质中散射的性质。 特别地，它可以用于识别“开放”散射通道的存在，照明状态对应于波场的接近完全透射。 通过检查传输矩阵奇异值的分布，并将结果与理论预测进行比较来进行分析。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. The transmission matrix for a highly scattering sample is the linear transformation relating the incident complex, monochromatic wavefield to the scattered wavefield in the forward direction. It can be measured by illuminating the sample with a sequence of plane-wave basis states, and rapidly scanning the illumination angle to cover the range determined by the numerical aperture. Once the matrix has been recorded, it may be analyzed to draw inferences about the nature of the scattering in the medium. In particular, it may be used to identify the existence of "open" scattering channels, illumination states corresponding to near-complete transmission of the wavefield. Analysis is performed by examining the distribution of the transmission matrix singular values, and comparing the results to theoretical predictions.