Definition of electron optics in US English:

electron optics

plural noun

  • treated as singular The branch of physics that deals with the behavior of electrons and electron beams in magnetic and electric fields.

    • ‘Lenses for precision electron optics are mainly magnetic, requiring large cylinders of soft iron to focus an electron beam.’
    • ‘Electron optics was born in 1927, when Hans Busch showed that the elementary lens equation is applicable to electron image formation.’