A device for focusing a stream of electrons by means of electric or magnetic fields.
- ‘Ruska knew that electrons could be manipulated within a magnetic field, and in the late 1920s, he designed a magnetic coil that acted as an electron lens.’
- ‘An electron lens is used for focusing electrons from a cathode to an anode.’
- ‘An even better way is to step an acceleration or retardation voltage in an electron lens mounted in front of the energy analyser.’
- ‘The technology, called aberration correction, fixes imperfections on the microscope's electron lenses.’