collimator Hear it!

collimator definition

col·li·ma·tor (-māt′ər)

noun

  1. a small telescope with cross hairs at its focus, fixed to another telescope, surveying instrument, etc. for adjusting the line of sight
  2. a device that causes a beam of radiation, as light, to move as parallel rays

Etymology: see collimate

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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