205037 ⎘
Details of cathode-ray tubes or of electron-beam tubes of the types covered by group; Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement; Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses for controlling cross-section
PARTICLE BEAM SYSTEM
#2Electron beam column for three-dimensional printing device, three-dimensional printing device, and three-dimensional printing method
#3Methods and devices for producing an electron beam
#4Device for producing an electron beam