Design of free-distortion and rotation magnetic lens

Abstract EN

In this present work, an investigation of a magnetic projector lens with tapered- cylindrical pole pieces has been designed and constructed, consisting of two double magnetic lenses.

By using this lens a rotation and distortion free images have been obtained, after the electron-optical properties have been computed by computational programs which were previously prepared.

Results indicated the possibility of designing such a lens to give rotation and distortion free images to be used in Transmission Electron Microscopes (TEM) over a wide range of accelerating voltages.