collimator

About 0.38 uses per million words.

Meaning

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

Similar words

pinhole decollimation autocollimation collimation collider barlow lens aplanat ring laser linearizer corrective lens

Often followed by

and is lens to with of was in for

Word family

collimators