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2026

Single-shot imaging of a phase object fully enclosed by a dynamic scattering layer

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The team led by Mooseok Jang at the Korea Advanced Institute of Science and Technology has transformed the problem of random scattering into a deterministic holographic imaging task by introducing a tightly focused illumination scheme that minimizes the number of spatial modes transmitted through the forward scattering layer. Leveraging this deterministic forward‑propagation physics, the authors have developed a physically guided joint optimization framework capable of simultaneously reconstructing phase objects and estimating unknown system parameters—namely, the scattering blur kernel and propagation distance—from a single intensity measurement, without requiring separate calibration of these parameters. Experimental results demonstrate that this approach enables robust phase imaging of objects fully embedded within two dynamic scattering layers, with a memory effect as low as 0.2°. To the authors’ knowledge, this work presents a technique that exploits the spatial coherence of scattering layers, opening a new avenue for applications such as metrology and detection through scattering media.

The research findings were published in Optica on July 1, 2026, under the title “Single-shot imaging of phase objects fully enclosed by dynamic scattering layers.”

Figure 1: Comparison of intensity images obtained from dynamic scattering layer measurements under different illumination conditions.

Figure 2: Holographic Encoding and Reconstruction Framework Based on Dynamic Scattering

Figure 3: (a) SSIM between the reference intensity at a propagation distance of 8 mm and σ = 2, and the simulated intensity in the distance parameter space σ.

Figure 4: Experimental setup Figure 5: (a) Relationship between the spacing of two layers of Scotch tape and the FWHM of the true value of the scattering blur kernel.