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    Area of Science:

    • X-ray imaging
    • Diffractive imaging
    • Coherent diffractive imaging

    Background:

    • Ptychography achieves high resolution in hard X-ray imaging.
    • Current methods require accurate mathematical models of the illumination-object interaction for reconstruction.
    • Limitations exist in the information obtainable and working distances with conventional ptychography.

    Purpose of the Study:

    • To develop a novel ptychographic method for reconstructing object exit wavefields.
    • To eliminate the need for prior knowledge of the illumination-object interaction.
    • To expand the capabilities and applications of ptychography in X-ray microscopy.

    Main Methods:

    • A translation function is applied to an analyzer placed after the object.
    • Diffraction patterns are measured at various analyzer positions.
    • Numerical backpropagation is used to reconstruct the propagated wavefield and the object exit wavefield.

    Main Results:

    • Successful reconstruction of the object exit wavefield was achieved without prior knowledge of the interaction.
    • The method demonstrated high resolution in hard X-ray imaging.
    • Extended working distances of tens of millimeters were enabled.

    Conclusions:

    • The developed method overcomes limitations of conventional ptychography by removing the requirement for interaction modeling.
    • This technique provides access to information previously inaccessible.
    • It broadens the applicability of ptychography in scientific research and imaging.