Electron Beams, Lenses, and Optics - 1st Edition - ISBN: 9780122380020, 9781483271781

Electron Beams, Lenses, and Optics

1st Edition

Volume 2

Authors: A. B. El-Kareh J. C. J. El-Kareh
eBook ISBN: 9781483271781
Imprint: Academic Press
Published Date: 1st January 1970
Page Count: 334
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Description

Electron Beams, Lenses, and Optics, Volume 2 deals with the aberrations relating to electronic optics.

This book discusses the geometrical aberrations of lenses; spherical aberration of electric and magnetic lenses; and measurement of the spherical aberration of various electric and magnetic lenses. The theory of diffraction; influence of space charge in high density electron beams; and chromatic aberration are also deliberated.

This publication likewise covers the classification of the geometrical aberrations; derivation of the coefficient of spherical aberration according to Glaser; and pepper-pot method or Hartmann's test. The Fraunhofers diffraction through a circular aperture; force due to coulomb repulsion; and upper limit of the chromatic aberration of magnetic lenses are also included.

This volume is valuable to industrial scientists and engineers concerned with electrostatic and magnetic lenses.

Table of Contents


List of Symbols


IX. Geometrical Aberrations of Lenses


9.1 Types of Aberrations


9.2 Third-Order Theory


9.3 Geometrical Aberrations


9.4 Classification of the Geometrical Aberrations


9.5 Description of the Aberration Figures


9.6 Calculation of the Geometrical Aberration Coefficients


9.7 Solution for Paraxial Rays


9.8 Calculation of the Aberrations


9.9 Spherical Aberration


9.10 Coma Coefficient


9.11 Anisotropie Coma Coefficient


9.12 Curvature Coefficient


9.13 Astigmatism Coefficient


9.14 Anisotropie Astigmatism Coefficient


9.15 Distortion Coefficient


9.16 Anisotropie Distortion Coefficient


Further Reading


X. The Spherical Aberration of Electric and Magnetic Lenses


10.1 The Impossibility of Canceling the Spherical Aberration


10.2 Definition of the Coefficient Cs


10.3 Disk of Minimum Confusion


10.4 The Spherical Aberration of the Combination of Two Thin Lenses


10.5 Conversion of Cs from One Object Position to Another


10.6 Derivation of the Coefficient of Spherical Aberration according to Glaser


10.7 Glaser's Expression for Cs of Purely Magnetic Fields


10.8 Spherical Aberration of a Magnetic Lens with a Bell-Shaped Field Distribution


10.9 Spherical Aberration of the Symmetrical Magnetic Lens


10.10 Spherical Aberration of an Electrostatic Immersion Lens


10.11 Spherical Aberration of Einzel Lenses


Further Reading


XI. Measurement of the Spherical Aberration of Various Electric and Magnetic Lenses


11.1 The Pepperpot Method or Hartmann's Test


11.2 The Shadow Method


11.3 The Halo Method


11.4 The

Details

No. of pages:
334
Language:
English
Copyright:
© Academic Press 1970
Published:
Imprint:
Academic Press
eBook ISBN:
9781483271781

About the Author

A. B. El-Kareh

J. C. J. El-Kareh

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