
Electron optics is a mathematical framework for the calculation of particle paths along given electrostatic or magnetostatic fields. The term optics is used because a charged particle beam can be manipulated using magnetic lenses in a similar fashion to the manipulation of a light beam with optical lenses. Electron optics calculations are, besides...
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http://en.wikipedia.org/wiki/Electron_optics

branch of physics that is concerned with beams of electrons, their deflection and focusing by electric and magnetic fields, their interference when ...
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http://www.britannica.com/eb/a-z/e/20

<study> The science that deals with propagation electrons, as light optics deals with that of light and its phenomena. Eye lens (see lens, eye). ... (05 Aug 1998) ...
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http://www.encyclo.co.uk/local/20973

[
n] - the branch of electronics that deals with beams of electrons and their focusing and deflection by magnetic fields
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http://www.webdictionary.co.uk/definition.php?query=electron%20optics

This is the arrangement of electrostatic and magnetic fields used to produce and focus an electron beam from a Thermionic Cathode.
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https://www.encyclo.co.uk/local/20757
noun the branch of electronics that deals with beams of electrons and their focusing and deflection by magnetic fields
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https://www.encyclo.co.uk/local/20974

the study and use of the physical and optical properties of beams of electrons under the influence of electric or magnetic fields.
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https://www.infoplease.com/dictionary/electron-optics
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