基于同步辐射的快速叠层成像研究进展

    Advances in Synchrotron Radiation-based Rapid Ptychographic Imaging

    • 摘要: 同步辐射光源凭借其高亮度、高相干性等独特优势,在科研领域中取得了广泛的应用,在一众成像方法中,其与叠层成像技术的结合备受关注。叠层成像技术通过逐点交叠扫描的方式,采集样品的衍射图样,并利用冗余信息迭代重建样品的复振幅分布。随着光学成像元件的不断发展和应用场景的拓展,目前已在扫描记录过程和重建算法领域发展出了多种快速叠层成像方法。该文概述了高能同步辐射光源(High Energy Photon Source,HEPS)的进展及叠层成像的基本原理,并从飞行扫描技术、多光束扫描技术和深度学习重建算法3个方面具体介绍了同步辐射中快速叠层成像技术的最新研究进展。

       

      Abstract: Synchrotron radiation light sources, leveraging their distinctive advantages of high brightness and high coherence, have achieved widespread applications in scientific research. Among various imaging methodologies, the integration of ptychography with synchrotron radiation has attracted significant attention. Ptychography employs a point-by-point overlapping scanning strategy to collect diffraction patterns from specimens and iteratively reconstructs the complex amplitude distribution of samples through redundant information utilization. With continuous advancements in optical imaging components and expanding application scenarios, numerous rapid ptychographic imaging methods have emerged in both scanning-recording processes and reconstruction algorithms. This paper systematically reviews the progress of the High Energy Photon Source (HEPS) and elucidates the fundamental principles of ptychography. Furthermore, it highlights recent advances in rapid ptychographic imaging techniques at synchrotron facilities through three key areas: fly-scanning techniques, multi-beam scanning strategies, and deep learning-based reconstruction algorithms.

       

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