Patent ID: 6040576
Filing Date: 2000-03-21
Classification: H01J

Abstract:
An energy filter having an exit image plane (BA) and a dispersion plane (S), comprising:a diaphragm arrangement (14, 27, 30) for energy selection in said dispersion plane (S) or in a plane (S') conjugate to said dispersion plane (S), andat least one deflecting system (12, 13; 12', 13'; 12', 25) preceding said diaphragm arrangement (14, 27, 30), that effects a deflection of an electron beam, wherein setting of different energy bandwidths takes place by different excitation of said deflecting system (12, 13; 12', 13'; 12"", 25, 28), which results in different deflections of said electron beam relative to said diaphragm arrangement (14, 27, 30).