期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 62, 期 6-7, 页码 626-630出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2007.03.001
关键词
synchrotron radiation; phase contrast; radiography; interferometry
类别
An interferometric technique for hard X-rays is presented. It is based on two transmission gratings and a phase-stepping technique, and it provides separate radiographs of the phase and absorption profiles of bulk samples. Tomographic reconstruction yields quantitative threedimensional maps of the X-ray refractive index and of the attenuation coefficient, with a spatial resolution down to a few microns. The method is mechanically robust, it requires little monochromaticity, and can be scaled up to large fields of view. These are important prerequisites for use with laboratory X-ray sources. Numerous applications ranging from wave front sensing to medical radiography are presently under investigation. (c) 2007 Elsevier B.V All rights reserved.
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