Exit wave reconstruction at atomic resolution

被引：137

作者：

Allen, LJ ^{[1
]}

McBride, W ^{[1
]}

O'Leary, NL ^{[1
]}

Oxley, MP ^{[1
]}

机构：

[1] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

来源：

ULTRAMICROSCOPY | 2004年 / 100卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

transmission electron microscopy; exit wave reconstruction; phase retrieval; partial coherence;

D O I：

10.1016/j.ultramic.2004.01.012

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

An iterative method for exit wave function reconstruction based on wave function propagation in free space is presented. The method, which has the potential for application to many forms of microscopy, has been tailored to work with a through focal series of images measured in a high-resolution transmission electron microscope. Practical difficulties for exit wave reconstruction which are pertinent in this experimental environment are the slight incoherence of the electron beam, sample drift and its effect upon the defocus step size that can be utilised, and the number of image measurements that need to be made. To gauge the effectiveness of the method it is applied to experimental data that has been analysed previously using a maximum likelihood formalism (the MAL method). (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：91 / 104

页数：14

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