High-resolution optical imaging through or within thick scattering media is a long sought after yet unreached goal. In the past decade, the thriving technique developments in wavefront measurement and manipulation do not significantly push the boundary forward. The optical diffusion limit is still a ceiling. In this work, we propose that a scattering medium can be conceptualized as an assembly of randomly packed pinhole cameras and the corresponding speckle pattern as a superposition of randomly shifted pinhole images. The concept is demonstrated through both simulation and experiments, confirming the new perspective to interpret the mechanism of information transmission through scattering media under incoherent illumination. We also analyze the efficiency of single-pinhole and dual-pinhole channels. While in infancy, the proposed method reveals a new perspective to understand imaging and information transmission through scattering media.

为研究散射光强度随光子在散射媒质中散射光程的变化，基于单散射理论与扩散波光谱理论，采用了低相干动态光散射装置对不同粒径大小的聚苯乙烯悬浮液进行研究。将测量得到的背散射光光场强度谱的线宽与相应的理论计算结果相比较发现，在短光程区域，考虑容器壁附近拖曳效应的影响后，对于不同粒径的颗粒，光程为约5倍粒子平均自由程的区域可看成为单散射区域；对于光程大于225 μm的区域可看成为扩散光波区域。实验结果表明低相干动态光散射法可实现高散射媒质从单散射区域到低次散射再到扩散区域的全光程的可分割的光场强度谱测量。

提出了金属薄膜厚度对薄膜中自由电子的平均自由程影响的物理模型,并给出了薄膜中自由电子的平均自由程的修正公式.理论研究表明：当膜厚小于自由电子的平均自由程时，薄膜中电子平均自由程随膜厚的减小而减小;当膜厚大于或等于自由电子的平均自由程时，薄膜中电子的平均自由程与块状材料一样.利用薄膜中电子平均自由程的计算公式，修正了薄膜导电率的基本理论表达式，再利用金属薄膜的反射率与薄膜导电率的关系，得出金属薄膜厚度对其光反射率的影响.计算机模拟表明：当薄膜厚度小于电子自由程时，金属薄膜反射率随薄膜厚度变化而呈非线性关系.