Wu Tengfei, Dong Jonathan, Shao Xiaopeng, Gigan Sylvain
Opt Express. 2017 Oct 30;25(22):27182-27194. doi: 10.1364/OE.25.027182.
Recently introduced angular-memory-effect based techniques enable non-invasive imaging of objects hidden behind thin scattering layers. However, both the speckle-correlation and the bispectrum analysis are based on the statistical average of large amounts of speckle grains, which determines that they can hardly access the important information of the point-spread-function (PSF) of a highly scattering imaging system. Here, inspired by notions used in astronomy, we present a phase-diversity speckle imaging scheme, based on recording a sequence of intensity speckle patterns at various imaging planes, and experimentally demonstrate that in addition to being able to retrieve the image of hidden objects, we can also simultaneously estimate the pupil function and the PSF of a highly scattering imaging system without any guide-star nor reference.
最近引入的基于角向记忆效应的技术能够对隐藏在薄散射层后面的物体进行非侵入性成像。然而，散斑相关性和双谱分析都基于大量散斑颗粒的统计平均值，这决定了它们很难获取高散射成像系统点扩散函数（PSF）的重要信息。在此，受天文学中使用的概念启发，我们提出了一种相位多样性散斑成像方案，该方案基于在不同成像平面记录一系列强度散斑图案，并通过实验证明，除了能够检索隐藏物体的图像外，我们还可以在没有任何导星或参考的情况下，同时估计高散射成像系统的光瞳函数和PSF。
