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Electron Optics: aberration correction of electron lenses

The resolution in many electron optical applications is limited by lens aberrations. These can in principle be compensated by electron mirrors. We are in the process of building an aberration-corrected photoemission electron microscope.
Its beam line is shown on the right.

Projection images of a square mesh obtained with an uncorrected electron lens system (top) and with a mirror-corrected system (bottom). No distortions are noticeable in the aberration corrected case.
G. Rempfer et al., Microsc. Microanal. 3, 14 (1997)

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Portland State University - Physics Department

The resolution in many electron optical applications is limited by lens aberrations. These can in principle be compensated by electron mirrors. We are in the process of building an aberration-corrected photoemission electron microscope. Its beam line is shown on the right.
Projection images of a square mesh obtained with an uncorrected electron lens system (top) and with a mirror-corrected system (bottom). No distortions are noticeable in the aberration corrected case.	G. Rempfer et al., Microsc. Microanal. 3, 14 (1997)