Non-invasive single-shot imaging through scattering layers and around corners via speckle correlations
Non-invasive single-shot imaging through scattering layers and around corners via speckle correlations
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DOI：
10.1038/nphoton.2014.189
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发表时间：
2014-10-01
期刊：
影响因子：
35
通讯作者：
Gigan, Sylvain
中科院分区：
文献类型：
--
作者：
Katz, Ori;Heidmann, Pierre;Gigan, Sylvain
穿过复杂样品及其内部的光学成像对于许多领域的重要应用来说是一项艰巨的挑战。根本问题是生物组织等不均匀样品会随机散射和漫射光，从而阻碍了衍射极限图像的形成。尽管最近取得了许多进展，但目前还没有方法可以使用漫射光进行实时非侵入性成像。在这里，我们表明，由于散斑相关性的“记忆效应”，用标准相机捕获的散射光的单个高分辨率图像可以编码足够的信息，以通过视觉上不透明的层和角落周围的衍射极限分辨率进行成像。我们通过实验证明了使用空间不相干光和各种样本（从白色油漆到动态生物样本）通过散射介质和角落周围的单次成像。我们的单次无镜头技术很简单，不需要波前整形，也不需要时间选通或干涉检测，并且在这里使用拍照手机实现。它有可能在当前无法访问的场景中实现成像。
Optical imaging through and inside complex samples is a difficult challenge with important applications in many fields. The fundamental problem is that inhomogeneous samples such as biological tissue randomly scatter and diffuse light, preventing the formation of diffraction-limited images. Despite many recent advances, no current method can perform non-invasive imaging in real-time using diffused light. Here, we show that, owing to the 'memory-effect' for speckle correlations, a single high-resolution image of the scattered light, captured with a standard camera, encodes sufficient information to image through visually opaque layers and around corners with diffraction-limited resolution. We experimentally demonstrate single-shot imaging through scattering media and around corners using spatially incoherent light and various samples, from white paint to dynamic biological samples. Our single-shot lensless technique is simple, does not require wavefront-shaping nor time-gated or interferometric detection, and is realized here using a camera-phone. It has the potential to enable imaging in currently inaccessible scenarios.