Simple prescriptions for estimating three-fold astigmatism
暂无分享,去创建一个
Optimal expressions are given for the estimation of three-fold astigmatism (and other aberrations) following measurement either of the image displacements or of the diffractogram shapes for sets of four images with mutually orthogonal injected beam tilts.
[1] W. O. Saxton. Observation of lens aberrations for very high‐resolution electron microscopy. I. Theory , 1995 .
[2] O. Krivanek,et al. Three-fold astigmatism in high-resolution transmission electron microscopy , 1994 .
[3] K. D. van der Mast,et al. An autofocus method for a TEM , 1987 .
[4] Kazuo Ishizuka,et al. Coma-free alignment of a high-resolution electron microscope with three-fold astigmatism , 1994 .