Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9816897 | Ultramicroscopy | 2005 | 10 Pages |
Abstract
We have developed a numerical approach for the accurate and efficient calculation of HREM image intensity formed using a partially coherent source. The approach is based on Monte Carlo integration, and is suitable for use in general image restoration methods using a series of images. The accuracy of this approach is compared with calculations based on the transmission cross coefficient (TCC) for strong scattering objects, as a function of the number of sampling points, defocus, atomic number and specimen thickness. Its efficiency is compared with that of exact TCC calculations based on equally-spaced sampling of the beam divergence and focal spread distributions. The results indicate that the Monte Carlo approach is particularly advantageous for nonlinear image restoration algorithms.
Keywords
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Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
L.Y. Chang, R.R. Meyer, A.I. Kirkland,