![]() ![]() This is especially useful for making CRTs for different applications. The brightness, color and persistence of the illumination can be varied by using different kinds of phosphor. These are usually used in oscilloscopes as magnetic deflection which would lessen the inductive reactance of the magnetic coils and limit the frequency response of the oscilloscope. They usually employ magnetic deflection for changing the orientation of the electron beams but other types use electrostatic deflection. The CRT also known as the picture tube was the only choice for a display device up until the less bulky and less power hungry LCD was invented. cath·ode-ray tube (abbr.: CRT) (also cath·ode ray tube) n. Techopedia Explains Cathode Ray TubeĪ cathode ray tube is a specialized vacuum tube where images can be created by shooting electrons beams at the phosphorescent surface. This is done by varying the magnetic field generated by coils which is driven by electronic circuits located along the neck of the tube. Modern CRT monitors use magnetic deflection to bend the electron beams. Images and color are produced by shooting and controlling the electron beams representing each additive color light (red, blue and green) using the video signal as the reference. Electrons emitted from a heated filament are. ![]() (top) - The larger of these electrostatic cathode-ray tubes is made of glass and measures 5 inches. The resolution, the available power and other parameters are largely determined by the construction and design of the component elements of the tube. ![]() In a computer monitor or in a television set, the entire front of the tube is being scanned systematically and rapidly in a fixed pattern which is called a raster. A vacuum tube with an electron gun at one end and a fluorescent screen at the other. This analysis of both electrostatic and magnetic type tubes provides better understanding of TV picture tube operation. The x-ray tube is the basis for the production of radiation and much of what can be achieved with a radiology system depends on the characteristics of the tube. ![]()
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