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    Area of Science:

    • Optics and Photonics
    • Interferometry
    • Holographic Imaging

    Background:

    • Holography conventionally measures optical wavefronts using interferometry.
    • Coherence time limits conventional holography, especially for remote objects under weak illumination.
    • Existing methods face challenges with long integration times and phase stability.

    Purpose of the Study:

    • To circumvent the coherence time limitation in holographic measurements.
    • To enable phase imaging and 3D reconstruction of remote objects using weak illumination.
    • To develop a robust holographic technique without active phase stabilization.

    Main Methods:

    • Utilized intensity correlation interferometry.
    • Combined multiple randomly phase-shifted holograms.
    • Overcame the limitation of interferometer coherence time for hologram acquisition.

    Main Results:

    • Successfully performed phase imaging and 3D reconstruction.
    • Achieved imaging of an object at approximately 3 meters distance.
    • Demonstrated the technique's efficacy with weak illumination and without active phase stabilization.

    Conclusions:

    • Intensity correlation interferometry offers a novel approach to overcome coherence time limitations in holography.
    • This technique significantly expands the applicability of holography for remote and weakly illuminated objects.
    • The method provides a robust and practical solution for advanced holographic imaging.