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electron gun |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.01 sec. |
electron gunA device that creates a fine beam of electrons that is focused on a phosphor screen in a CRT. electron gun [i′lek‚trän ‚gən] (electronics) An electrode structure that produces and may control, focus, deflect, and converge one or more electron beams in an electron tube. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Such a CRT must be thick enough so that the electron gun isn't too close to the screen; otherwise, the image becomes distorted. These advances include: (1) field-emission gun electron beam instruments such as scanning electron microscopes (FEG-SEMs) that have high brightness electron guns with excellent performance at low beam energies, [E. A similar process is at work in TV screens: An electron gun fires a beam into various metals embedded in the screen, which combine to produce a color picture. |
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