ELECTRON BEAM RADIATING DEVICE

摘要

PURPOSE:To enalbe an electronic beam radiating device to be utilized for a solid forming beam and a Gaussian spot by providing in a position in fornt of a radiating lens a lens designed capable of being switched either to transmission of electronic beam or focusing of the same. CONSTITUTION:Provided in a position in front of a radiating lens 11 is an electrostatic lens 6 designed capable of being switched to either transmission or focusing of electronic beam having made a crossover image 5 in the center of a blanking board 4 by a condenser lens 3 with electronic beam radiated from a crossover 2 made by an electronic gun 1. The figure demonstrates utilization of Guassian spot which focusing an electronic beam, makes a crossover image 16 in the center of a forming slit 7 and forms an image on a base board provided on the bottom.