Theory of speckle intensity correlations over object position in a heavily scattering random medium
Theory of speckle intensity correlations over object position in a heavily scattering random medium
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DOI：
10.1103/physreva.101.063827
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发表时间：
2020-06-19
影响因子：
2.9
通讯作者：
Luo, Qiaoen
中科院分区：
文献类型：
--
作者：
Webb, Kevin J.;Luo, Qiaoen
我们提出了一个一般理论的移动物体的光学成像被大散射随机介质遮挡。测量包括收集一系列散斑强度图像，作为移动物体位置的函数。可以形成统计平均强度相关性，并有可能提供有关物体的微观和宏观信息。对于宏观物体和相对于波长都很大的平移距离，有一种明确的方法来反演测量以形成隐藏物体的图像。具有远亚波长分辨率的超分辨率传感和成像存在机会。重要的是，背景随机散射介质的厚度没有基本的限制，除了实际需要检测足够数量的光子和足够的背景散射来发展高斯场统计。该方法可以推广到任何波的类型和频率，假设有足够的时间相干性。应用包括深层组织在体内成像和传感在和通过各种形式的环境杂波。该理论还为散射体或发射体运动情况下的强度干涉测量和纠缠态检测提供了另一个维度。
We present a general theory for optical imaging of moving objects obscured by heavily scattering random media. Measurements involve collecting a series of speckle intensity images as a function of the position of a moving object. A statistical average intensity correlation can be formed with the potential to provide access to microscopic and macroscopic information about the object. For macroscopic objects and translation distances that are both large relative to the wavelength, there is a clear method to invert measurements to form an image of the hidden object. Opportunities exist for super-resolution sensing and imaging, with far-subwavelength resolution. Importantly, there is no fundamental limit to the thickness of the background randomly scattering medium, other than the practical requirement of detecting an adequate number of photons and sufficient background scatter for developed Gaussian field statistics. The approach can be generalized to any wave type and frequency, under the assumption that there is adequate temporal coherence. Applications include deep tissue in vivo imaging and sensing in and through various forms of environmental clutter. The theory also provides another dimension for intensity interferometry and entangled state detection to the case with motion of the scatterer or emitter.