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Updated: Apr 26, 2026

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Phase retrieval through a one-dimensional ptychographic engine.

Fabio A Vittoria, Paul C Diemoz, Marco Endrizzi

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    |August 5, 2014
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    This study introduces a novel imaging method combining ptychography and Fresnel propagation. It significantly reduces acquisition time and increases the field of view for studying large objects with high resolution.

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    Area of Science:

    • X-ray imaging
    • Optical microscopy
    • Materials science

    Background:

    • Ptychographic techniques offer high-resolution imaging by reconstructing an object's complex transmission function.
    • Current ptychographic methods require extensive acquisition times and are limited by the scanned area size.
    • These limitations restrict the study of larger samples and increase overall experiment duration.

    Purpose of the Study:

    • To develop an advanced imaging technique that overcomes the limitations of traditional ptychography.
    • To enable faster data acquisition and larger field-of-view imaging for complex samples.
    • To reduce the overall exposure time and scanning burden in high-resolution imaging.

    Main Methods:

    • A hybrid approach combining one-dimensional ptychography with Fresnel propagation in the orthogonal direction was developed.
    • A strongly asymmetric probe was employed to facilitate directional scanning.
    • The method allows for scanning in a single direction, significantly reducing data acquisition requirements.

    Main Results:

    • The new method substantially reduces sample exposure times and increases the field of view.
    • It enables the scanning of relatively large objects without compromising imaging quality.
    • Resolution in one direction is traded for significantly improved speed and sample size accessibility.

    Conclusions:

    • This hybrid imaging technique offers a practical solution for high-resolution imaging of large samples.
    • It significantly enhances efficiency in terms of acquisition time and scanned area.
    • The method opens new possibilities for studying a wider range of materials and structures.