ELECTRON GUN FOR C-CRT

摘要

The electron gun for reducing the spherical aberration of the electrostatic lens comprises a cathode control electrode (22), a screen electrode (23), a number of uni-potential type focus lenses (24-28), and a bi-potential type final acceleration electrode (29). The electron beam hole of the focus lens is placed beside of a cathode (21), and receiving high voltage is formed larger than one of the acceleration lens receiving low voltage.