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Webster 1913 Edition

Collimator

Col′li-maˊtor

,
Noun.
1.
(Astron.)
A telescope arranged and used to determine errors of collimation, both vertical and horizontal.
Nichol.
2.
(Optics)
A tube having a convex lens at one end and at the other a small opening or slit which is at the principal focus of the lens, used for producing a beam of parallel rays; also, a lens so used.

Definition 2024

collimator

collimator

English

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.

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