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Related Experiment Video

Updated: Feb 20, 2026

Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
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Lensless complex amplitude image retrieval through a visually opaque scattering medium.

Bhargab Das, Nandan S Bisht, R V Vinu

    Applied Optics
    |October 20, 2017
    PubMed
    Summary
    This summary is machine-generated.

    Researchers retrieved complex amplitude images through scattering media using intensity measurements and phase retrieval. This lensless technique reconstructs hidden object information from scattered light patterns, enabling imaging where optics are impractical.

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    Area of Science:

    • Optics and Photonics
    • Image Reconstruction
    • Wavefront Sensing

    Background:

    • Imaging through scattering media remains a significant challenge in optics.
    • Complex amplitude information is crucial for full object characterization but difficult to retrieve.
    • Traditional imaging systems are limited by aberrations and physical constraints.

    Purpose of the Study:

    • To demonstrate a lensless method for retrieving complex amplitude images through visually opaque scattering media.
    • To encode and reconstruct object information using interference patterns from spatially fluctuating fields.
    • To overcome limitations of conventional imaging in non-ideal optical environments.

    Main Methods:

    • Utilizing intensity measurements of scattered light from a visually opaque diffuser.
    • Employing a phase-retrieval algorithm to reconstruct the interference pattern.
    • Implementing a lensless optical configuration to avoid aberration effects.

    Main Results:

    • Successful digital regeneration of the interference pattern from a single Charge Coupled Device (CCD) image.
    • Recovery of complex fields for optical vortices with two different topological charges.
    • Demonstration of lensless complex amplitude image retrieval through scattering.

    Conclusions:

    • The proposed lensless technique effectively retrieves complex amplitude images from scattered light.
    • This method offers a promising solution for imaging in scenarios where conventional optics are not feasible.
    • The ability to reconstruct optical vortices highlights the technique's potential for advanced optical applications.