Phase retrieval by coherent modulation imaging

Fucai Zhang

doi:10.1038/ncomms13367

2016-11-18

142

Manuel Guizar‐Sicairos

Ian Robinson

DOI：10.1038/ncomms13367

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摘要

En 中文

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.

Keyword:

FREE-ELECTRON LASER

RAY-DIFFRACTION MICROSCOPY

RESOLUTION

TOMOGRAPHY

ALGORITHMS

OPTICS

PULSES

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期刊

Nature Communications

IF:

15.7

论文数:

9.4W

被引数:

91.2W

机构

swiss federal institutes of technology domain

学者数:

9.0W

论文数: 8.0W

被引数: 163

university of london

学者数:

21.5W

论文数: 19.7W

被引数: 305

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