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arXiv · 2410.19197

Single-shot X-ray ptychography as a structured illumination method

Abraham Levitan·Klaus Wakonig·Zirui Gao·Adam Kubec·Bing Kuan Chen·Oren Cohen·Manuel Guizar-Sicairos
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Abstract

Single-shot ptychography is a quantitative phase imaging method wherein overlapping beams of light arranged in a grid pattern simultaneously illuminate a sample, allowing a full ptychographic dataset to be collected in a single shot. It is primarily used at optical wavelengths, but there is interest in using it for X-ray imaging. However, the constraints imposed by X-ray optics have limited the resolution achievable to date. In this work, we reinterpret single-shot ptychography as a structured illumination method by viewing the grid of beams as a single, highly structured illumination function. Pre-calibrating this illumination and reconstructing single-shot data using the randomized probe imaging algorithm allows us to account for the overlap and coherent interference between the diffraction arising from each beam. We achieve a resolution 3.5 times finer than the numerical aperture-based limit imposed by traditional algorithms for single-shot ptychography. We argue that this reconstruction method will work better for most single-shot ptychography experiments and discuss the implications for the design of future single-shot X-ray microscopes.

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Abraham Levitan, Klaus Wakonig, Zirui Gao, Adam Kubec, Bing Kuan Chen, Oren Cohen, Manuel Guizar-Sicairos. 2024-10-24. Single-shot X-ray ptychography as a structured illumination method. https://doi.org/10.1364/ol.545836

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