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Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
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    Summary
    This summary is machine-generated.

    This study demonstrates singleshot polychromatic coherent diffractive imaging using high-order harmonic generation. The technique analyzes beam wavefront fluctuations and reconstructs sample properties with advanced algorithms like ADMM.

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    Area of Science:

    • Coherent diffractive imaging
    • High-order harmonic generation
    • X-ray optics

    Background:

    • Coherent diffractive imaging (CDI) enables label-free imaging of nanoscale structures.
    • High-order harmonic generation (HHG) sources offer compact, high-intensity, and tunable X-ray pulses for CDI.
    • Characterizing the coherence properties of HHG sources is crucial for optimizing CDI performance.

    Purpose of the Study:

    • To perform singleshot polychromatic CDI using an HHG source.
    • To analyze the coherence properties and wavefront fluctuations of the HHG beam.
    • To compare different phase retrieval algorithms for CDI reconstruction.

    Main Methods:

    • Singleshot polychromatic CDI was implemented using a high-intensity HHG source.
    • A multi-step approach involved spectral extraction from double-slit data.
    • Phase retrieval was performed using guided error reduction (ER) and alternating direction method of multipliers (ADMM).

    Main Results:

    • Reconstructions revealed shot-to-shot fluctuations in the incident beam wavefront.
    • The ADMM algorithm allowed for sparsity promotion in the reconstruction.
    • Successful imaging of sample properties was achieved despite source coherence variations.

    Conclusions:

    • Singleshot polychromatic CDI with HHG sources is feasible for characterizing sample properties.
    • Analysis of wavefront fluctuations provides insights into source coherence.
    • ADMM offers advantages for CDI reconstruction by incorporating sparsity constraints.