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Overlap-scanning Self-Referencing Diffractive Imaging with Enlarged Field of View under Incoherent Illumination

Applied Physics Letters(2025)SCI 2区SCI 3区

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Abstract
Coherent diffractive imaging (CDI), especially the ptychography, has been widely used in quantitative phase imaging. However, in traditional diffractive imaging schemes, a highly coherent light source is required for a better-posed inverse problem. Considering that the high coherence cannot be guaranteed in all cases and to avoid the multi-mode of low-coherence light sources complicating the iterative modeling of diffractive imaging, we proposed an overlap-scanning self-referencing diffractive imaging. As a non-iterative partially coherent diffractive imaging method, self-referencing diffractive imaging was combined with the procedure of overlap-scanning ptychography. It does not require prior knowledge of light source coherence, and only a coherent inverse problem was needed to be solved in the final stitching. It has been demonstrated to be able to recover the complex amplitude of objects illuminated by various low-coherence light sources. This study presents significant potential for applications in phase imaging with a wide-field of view under incoherent illuminations.
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要点】:本文提出了一种在非相干照明条件下,通过结合自参考衍射成像和重叠扫描技术,实现了视场扩大且无需光源相干性先验知识的衍射成像方法。

方法】:通过将自参考衍射成像与重叠扫描技术相结合,该方法在最终拼接阶段仅需要解决一个相干的逆问题,而不需要预先了解光源的相干性。

实验】:实验证明了该方法能够在不同非相干光源照明下恢复物体的复振幅,具有应用于非相干照明条件下宽视场相位成像的潜力;文中未提及具体使用的实验数据集名称。