collimator

== English == === Etymology === From collimate + -or. === Pronunciation === Rhymes: -eɪtə(ɹ) === Noun === collimator (plural collimators) (physics) An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence. (physics) A similar device that produces a parallel beam of particles such as neutrons. (astronomy) A small telescope attached to a larger one, used to point it in the correct general direction. ==== Derived terms ==== === Anagrams === microatoll, mortal coil