Abstract
The original objective of holography was to improve the resolution of an electron microscope. Since an aberration-free system cannot be achieved by the combination of concave and convex lenses in the electron case because of the lack of a concave electron lens, the resolution is determined by the aberrations of the objective lens and not by the fundamental limit of the electron wavelength. In fact, it was theoretically verified by Scherzer [8.1] that an axially-symmetric magnetic field can function only as a convex lens for an electron beam.
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References
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© 1993 Springer-Verlag Berlin Heidelberg
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Tonomura, A. (1993). High-Resolution Microscopy. In: Electron Holography. Springer Series in Optical Sciences, vol 70. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-13913-4_8
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DOI: https://doi.org/10.1007/978-3-662-13913-4_8
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