magnetic lens

noun

1. Physics. an electron lens using magnetic fields for focusing an electron beam.

magnetic lens

noun

1. a set of magnets, esp electromagnets, used to focus or defocus a beam of charged particles in an electron microscope, particle accelerator, or similar device

Word History and Origins

Origin of magnetic lens¹

First recorded in 1915–20

Example Sentences

Because the magnetic lens sits snugly inside the frame instead of resting on top of it, the connection was always secure.

From Outside Online

Some of them pass through a thin metal window in the vacuum-tank wall and are focused by a magnetic lens into a beam.

From Project Gutenberg