Abstract: Using in HDT-systems electron beam devises for reproducing pictures we have the means providing with high definition, which consists in decreasing electron-optical aberrations of CRT, which have an influence on beam focusing. The aberrations may be decreasing by correction by means of additional electron-optics elements, but the process of scanning determine necessity correction in accordance with the beam position in every time moment. That demand applying electron means of correction. There are considered electron-optical elements and the construction principles of electronic circuit which permit to realize correction.
Key words: HDTV, high definition television, catode ray tubes, aberations, electron-beam deflection system.