期刊
ULTRAMICROSCOPY
卷 160, 期 -, 页码 140-145出版社
ELSEVIER
DOI: 10.1016/j.ultramic.2015.10.009
关键词
Electron diffraction; software analysis; Ellipse fitting; Distortion
类别
资金
- Sasol
- University of Wollongong
- Australian Research Council (ARC)-Linkage, Infrastructure, Equipment and Facilities (LIEF) Grant [LE120100104]
A software method has been developed which uses ellipse fitting to analyse electron diffraction patterns from polycrystalline materials. The method, which requires minimal user input, can determine the pattern centre and the diameter of diffraction rings with sub-pixel precision. This enables accurate crystallographic information to be obtained in a rapid and consistent manner. Since the method fits ellipses, it can detect, quantify and correct any elliptical distortion introduced by the imaging system. Distortion information derived from polycrystalline patterns as a function of camera length can be subsequently recalled and applied to single crystal patterns, resulting in improved precision and accuracy. The method has been implemented as a plugin for the DigitalMicrograph software by Gatan, and is a freely available via the internet. (C) 2015 Elsevier BY. All rights reserved.
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