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Related Experiment Video

Updated: Feb 19, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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Imaging through a thin scattering layer and jointly retrieving the point-spread-function using phase-diversity.

Tengfei Wu, Jonathan Dong, Xiaopeng Shao

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    This summary is machine-generated.

    This study introduces a new phase-diversity speckle imaging technique. It allows imaging hidden objects and simultaneously estimating the point-spread-function (PSF) of scattering systems without a reference.

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    Area of Science:

    • Optical imaging
    • Wave optics
    • Scattering media

    Background:

    • Angular-memory-effect based techniques enable non-invasive imaging through scattering layers.
    • Existing methods like speckle-correlation and bispectrum analysis average speckle grains, limiting point-spread-function (PSF) information retrieval.
    • Highly scattering systems pose challenges for accurate imaging and system characterization.

    Purpose of the Study:

    • To develop a novel imaging technique for retrieving images of objects hidden behind scattering layers.
    • To simultaneously estimate the point-spread-function (PSF) and pupil function of highly scattering systems.
    • To overcome limitations of existing speckle-based imaging methods.

    Main Methods:

    • A phase-diversity speckle imaging scheme was developed, inspired by astronomical techniques.
    • The method involves recording a sequence of intensity speckle patterns at various imaging planes.
    • Simultaneous estimation of the pupil function and PSF was achieved without a guide-star or reference.

    Main Results:

    • The technique successfully retrieved images of hidden objects.
    • Simultaneous estimation of the pupil function and the point-spread-function (PSF) of the scattering system was demonstrated.
    • The method proved effective even for highly scattering imaging systems.

    Conclusions:

    • Phase-diversity speckle imaging offers a powerful tool for non-invasive imaging through scattering media.
    • This technique enables simultaneous image retrieval and characterization of the scattering system's optical properties (PSF and pupil function).
    • The developed method advances imaging capabilities in complex scattering environments without requiring external references.