Chapter

COHERENCE AND FOURIER OPTICS

JOHN C. H. SPENCE

in High-Resolution Electron Microscopy

Third edition

Published in print October 2008 | ISBN: 9780199552757
Published online January 2010 | e-ISBN: 9780191708664 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199552757.003.0004

Series: Monographs on the Physics and Chemistry of Materials

 COHERENCE AND FOURIER OPTICS

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This chapter discusses the theory of partial coherence (spatial coherence and chromatic coherence) and how they are applied to phase contrast imaging theory and to the multiple scattering theory. The damping envelopes and the Scherzer focus condition are derived. Expressions for the degree of cohence are given for the case of conical illumination. The coherence properties of different types of electron sources are summarized here, and in Chapter 9.

Keywords: partial coherence; damping envelope; spatial coherence; conical illumination; source size; Scherzer focus

Chapter.  8254 words.  Illustrated.

Subjects: Atomic, Molecular, and Optical Physics

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