4. Lens Aberrations: Diagnosis and Correction
- Rik Brydson
Published Online: 26 JUL 2011
DOI: 10.1002/9781119978848.ch4
Copyright © 2011 John Wiley & Sons, Ltd
Book Title
Aberration-Corrected Analytical Transmission Electron Microscopy
Additional Information
How to Cite
Bleloch, A. and Ramasse, Q. (2011) Lens Aberrations: Diagnosis and Correction, in Aberration-Corrected Analytical Transmission Electron Microscopy (ed R. Brydson), John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9781119978848.ch4
Editor Information
Leeds Electron Microscopy and Spectroscopy (LEMAS) Centre, Institute for Materials Research, SPEME, University of Leeds, Leeds, UK
Publication History
- Published Online: 26 JUL 2011
- Published Print: 16 SEP 2011
ISBN Information
Print ISBN: 9780470518519
Online ISBN: 9781119978848
- Summary
- Chapter
- References
Keywords:
- lens aberrations - diagnosis and correction;
- wave optics, progress of a wavefront - through optical system, calculated by wave equation;
- Schrödinger's wave equation for electrons - and Maxwell's equations for electromagnetic waves;
- geometric optics, approximation - limit of short wavelengths;
- time-varying fields - in particle accelerators, pulsed beam moving around beam ring;
- incoherent aberrations, where chromatic aberration - limiting resolution;
- geometric lens aberrations, and their classification - perfect spherical wave, to a point focus;
- spherical aberration-correctors - method, basis of two commercially available technologies;
- chromatic aberration, limiting aberration - operation, at lowest accelerating voltages;
- diagnosing lens aberrations - measuring aberration function
Summary
This chapter contains sections titled:
Introduction
Geometric Lens Aberrations and Their Classification
Spherical Aberration-Correctors
Getting Around Chromatic Aberrations
Diagnosing Lens Aberrations
Fifth Order Aberration-Correction
Conclusions
References