5 (in Lithuanian summaries in Lithuanian, English and Russian.). Given method can be easily extended tohigher level aberrations modelling. Electronic television is based on the development of the cathode ray tube - CRT - which is the picture tube found in modern television sets. Demonstrated that paraxial approach to deflection aberrations appears as astigmatism. The proposed model is based on curvilinear optical axistheory. The first commercially produced electronic TV sets containing cathode ray tubes are manufactured by Telefunken in Germany. When enough of the air in the chamber has been removed, electrons will freely accelerate from the negative electrode (cathode) towards the positive electrode (anode). Provided andsubstantiated the mathematical formulas required for aberrations modelling. Essentially, our cathode ray tube is just two electrodes in a vacuum chamber with a high voltage applied between them. cathode-ray tube (CRT), Vacuum tube that produces images when its phosphorescent surface is struck by electron beams. The largest use is in cathode-ray tubes (CRTs), used in older television sets, computer displays and oscilloscopes, before the advent of flat-panel displays. Article analizes mathematical modelling aspects of modern deflection systems. An electron gun (also called electron emitter) is an electrical component in some vacuum tubes that produces a narrow, collimated electron beam that has a precise kinetic energy. Despite theintensive development of new technologies, like liquid crystal displays (LCD) and plasma displays (PDP), it is obviousthat classic CRT will dominate in the market in many years to come.Due to large electron beam deflection angles δ > 45°, the application of conventional magnetic deflection systems aberrationstheory to modern CRT is not accurate. Most modern cathode-ray oscillographs are provided with a saw tooth. Rapid and continuous electronic industry development creates higher standarts for image reproduction devices, fromwhich cathode ray tubes (CRT) are currently most widely used, especially in reproduction of color images. cathode-ray tube (CRT), Vacuum tube that produces images when its phosphorescent surface is struck by electron beams. tubes which have persistence of the order of 15 seconds.
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