Statistical error analysis of electrode construction for electrostatic spline lenses

J. Szép, M. Szilagyi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

It is easy to calculate approximately the electrode shapes for a given axial potential distribution by neglecting its high-order derivatives. The lens with the electrodes determined this way has different optical properties than that with the original axial potential distribution. These differences were calculated for a large number of randomly generated samples with axial potential distributions in the form of cubic splines. The differences were found to be about ±5%-10% for the focal lengths and the chromatic aberration coefficients. The spherical aberration coefficients for the constructed electrode systems usually have smaller values than those of the original lens models, but the differences are larger. The conclusion is that this simple electrode construction method is usually accurate enough for practical lens design.

Original languageEnglish (US)
Pages (from-to)3539-3542
Number of pages4
JournalJournal of Applied Physics
Volume62
Issue number9
DOIs
StatePublished - Dec 1 1987

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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