TY - JOUR
AU - MARUSE,, Susumu
AB - Abstract Under the thin lens approximation, it is theoretically shown that the spherical aberration of electron lenses should be able to be corrected with a foil lens consisting of an aperture and a conducting foil. At first, the axial potential distribution in the foil lens is derived, and it is proved to agree within a few per cent errors with the potential distribution which is obtained by computation of the Laplace equation. With this analytical potential distribution, the Gaussian focal length f1 and the spherical aberration constant Ca1 of the foil lens are represented by the geometrical parameters. Secondly, the spherical aberration of the corrected lens is derived and compared with the experimental results. It is shown that the effective correcting power of the foil lens is properly reffered to the ratioCa1/f14. Thus the fundamental data for designing the foil lens are obtained. This content is only available as a PDF. Author notes *Presented at the 27th Meeting of Japanese Society of Electron Microscopy, Kyoto, May 1971 **Present address: Nala Branch of Hitachi Central Research Laboratory © Oxford University Press
TI - Optical Properties of the Foil Lens for the Correction of the Spherical Aberration
JF - Journal of Electron Microscopy
DO - 10.1093/oxfordjournals.jmicro.a049889
DA - 1973-01-01
UR - https://www.deepdyve.com/lp/oxford-university-press/optical-properties-of-the-foil-lens-for-the-correction-of-the-zkfBlO0ACU
SP - 321
EP - 328
VL - 22
IS - 4
DP - DeepDyve
ER -