collimator

English

Etymology

collimate +‎ -or

Noun

collimator (plural collimators)

1. (physics) An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence.
2. (physics) A similar device that produces a parallel beam of particles such as neutrons.
3. (astronomy) A small telescope attached to a larger one, used to point it in the correct general direction.

Anagrams

• microatoll, mortal coil