Method for Producing Optical Aberrations of Variable Magnitude
Original Publication Date: 1980-Nov-01
Included in the Prior Art Database: 2005-Feb-14
Introduction. The properties of electron optical lenses are limited by the types of fields which can be established, especially in free space. This development shows a new way of generating special lens properties, especially high-order properties or aberrations, from elements which singly do not possess the desired property. A method of generating aberration of either sign and varying the magnitude is described. The aberrations generated in this way are called combination aberrations.