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Coherent optical imaging of moving objects hidden in a heavily scattering random medium

Journal Article · · Physical Review A

Experimental results are presented that provide insight into the physics of statistical imaging in heavily scattering random media based on measured speckle correlations as a function of the change in position of a moving object. In this way, definitive interpretation of a rather complex and earlier theory is achieved, making this work an experimental complement to that theory paper []. Motion could be natural, where the set of positions is estimated or separately obtained, or directed, where a mechanical stage can be used to adjust the object's position. In the experiment, a coherent laser illuminates two scattering diffusers, while an object is translated between them in the resulting speckled field and images are collected in a transmission configuration. Results are shown for various objects of differing size and geometry, allowing the theory to be validated and interpreted with new understanding. This work demonstrates imaging opportunities, and applications include material characterization, environmental imaging and sensing, and deep-tissue imaging.

Published by the American Physical Society 2025
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003525
OSTI ID:
2547050
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 111; ISSN PLRAAN; ISSN 2469-9926
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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