electron gun :

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electron gun

  • n  the electrode that is the source of electrons in a cathode-ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electromagnetic apparatus that focuses it
News & Articles

  • These Tiles Are Made Of Your Grandma's Old TV Set
    What to do with 860 million pounds worth of cathode ray tubes? Grind them up and tile a bathroom with them. Before the invention of super-thin liquid crystal displays, if you wanted to watch television or look at something on a computer, you needed a cathode ray tube (CRT). Big and bulky, CRTs displayed images by using an electron gun that could shoot beams of light onto a fluorescent screen on ...
    April 28, 2014 - Fast Company Magazine

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