Abstract

A power-series expansion is used to derive expressions for the aberrations up to the third order in electron sheet beams, subject to purely electrostatic focusing. The “ray axis” is considered to be curvilinear in general. Chromatic effects are considered but space-charge is omitted. The treatment reveals the presence of four purely geometric aberrations and four others due to chromatic effects. No attempt is made to derive expressions for the aberration coefficients.

© 1959 Optical Society of America

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Optical Aberration Coefficients. V. On the Quality of Predicted Displacements

H. A. Buchdahl
J. Opt. Soc. Am. 49(11) 1113-1114 (1959)

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