Imaging Through Random Scatterer with Spatial Coherence Structure Measurement

Deming Peng,Yahong Chen,Yonglei Liu,Xuan Zhang,Fei Wang,Yangjian Cai,Yimeng Zhu

doi:10.3389/fphy.2021.828487

Deming Peng, Yahong Chen + Show 5 more

Open Access

https://doi.org/10.3389/fphy.2021.828487

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Abstract

Optical coherence is becoming an efficient degree of freedom for light field manipulations and applications. In this work, we show that the image information hidden a distance behind a random scattering medium is encoded in the complex spatial coherence structure of a partially coherent light beam that generates after the random scatterer. We validate in experiment that the image information can be well recovered with the spatial coherence measurement and the aid of the iterative phase retrieval algorithm in the Fresnel domain. We find not only the spatial shape but also the position including the lateral shift and longitudinal distances of the image hidden behind the random scatterer can be reconstructed, which indicates the potential uses in three-dimensional optical imaging through random scattering media.

Highlights

Spatial coherence is an important characteristic to describe the statistical properties of random light fields, and it has played a vital role in understanding interference, propagation, and light-matter interaction of both classical and quantum wave fields [1,2,3]
We find in the experiment that the image information hidden a distance behind the random scattering medium can be well reconstructed with the help of the spatial coherence structure measurement and the iterative phase retrieval algorithm
We studied the role of the spatial coherence structure measurement for the partially coherent scattered light on the recovery of the image information hidden behind a random scattering medium

Summary

INTRODUCTION

Spatial coherence is an important characteristic to describe the statistical properties of random light fields, and it has played a vital role in understanding interference, propagation, and light-matter interaction of both classical and quantum wave fields [1,2,3]. Based on the van Cittert–Zernike theorem, the intensity distribution p(v) of the fully coherent structured light before the random scatterer has a determinate relation with the complex spatial coherence structure μ(r1, r2) of the generated partially coherent secondary source. By measuring the complex spatial coherence structure of the partially coherent source, the image information encoded in the fully coherent light hidden behind the random scatterer can be well recovered.

PRINCIPLE

EXPERIMENTAL VERIFICATION

RESULTS AND DISCUSSION

CONCLUSION

DATA AVAILABILITY STATEMENT