Article
Simultaneous and Independent Adaptive Correction of Spherical and Chromatic Aberration Using an Electron Mirror and Lens Combination
Ultramicroscopy
(2012)
Abstract
We present a theoretical analysis of an electrostatic triode mirror combined with an einzel lens for the correction of spherical and chromatic aberration. We show that this device adaptively corrects spherical and chromatic aberration simultaneously and independently. Chromatic aberration can be compensated over a relative range of −38% to +100%, and spherical aberration over ±100% range. We compare the analytic calculation with a numerical simulation and show that the two descriptions agree to within 5% in the relevant operating regime of the device.
Disciplines
Publication Date
April, 2012
DOI
10.1016/j.ultramic.2012.02.001
Citation Information
Joseph P.S. Fitzgerald, Robert Campbell Word and Rolf Kӧnenkamp. "Simultaneous and Independent Adaptive Correction of Spherical and Chromatic Aberration Using an Electron Mirror and Lens Combination" Ultramicroscopy Vol. 115 (2012) p. 35 - 40 Available at: http://works.bepress.com/rolf_koenenkamp/23/