Phase retrieval by coherent modulation imaging.,Nature Communications

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Phase retrieval by coherent modulation imaging.
Nature Communications ( IF 14.7 ) Pub Date : 2016-11-18 , DOI: 10.1038/ncomms13367
Fucai Zhang _{1,

2,

3} , Bo Chen _{1,

2,

4} , Graeme R Morrison _{1,

2} , Joan Vila-Comamala ₅ , Manuel Guizar-Sicairos ₅ , Ian K Robinson _{1,

2,

6}

Affiliation

Phase retrieval is a long-standing problem in imaging when only the intensity of the wavefield can be recorded. Coherent diffraction imaging is a lensless technique that uses iterative algorithms to recover amplitude and phase contrast images from diffraction intensity data. For general samples, phase retrieval from a single-diffraction pattern has been an algorithmic and experimental challenge. Here we report a method of phase retrieval that uses a known modulation of the sample exit wave. This coherent modulation imaging method removes inherent ambiguities of coherent diffraction imaging and uses a reliable, rapidly converging iterative algorithm involving three planes. It works for extended samples, does not require tight support for convergence and relaxes dynamic range requirements on the detector. Coherent modulation imaging provides a robust method for imaging in materials and biological science, while its single-shot capability will benefit the investigation of dynamical processes with pulsed sources, such as X-ray free-electron lasers.

中文翻译：

通过相干调制成像进行相位检索。

当只能记录波场的强度时，相位恢复是成像中长期存在的问题。相干衍射成像是一种无透镜技术，它使用迭代算法从衍射强度数据中恢复振幅和相位对比图像。对于一般样品，从单衍射图案中进行相位检索一直是算法和实验的挑战。在这里，我们报告了一种使用样本出射波的已知调制的相位检索方法。这种相干调制成像方法消除了相干衍射成像固有的模糊性，并使用涉及三个平面的可靠、快速收敛的迭代算法。它适用于扩展样本，不需要对收敛的严格支持，并放宽了对检测器的动态范围要求。相干调制成像为材料和生物科学中的成像提供了一种强大的方法，而其单次拍摄能力将有利于利用脉冲源（例如 X 射线自由电子激光器）研究动态过程。

更新日期：2016-11-20

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