What is the meaning of Collimator?

(n.) 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.
(n.) A telescope arranged and used to determine errors of collimation, both vertical and horizontal.

Webster's Revised Unabridged Dictionary

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APA	Webster's. (2011). collimator. Retrieved September 21, 2026, from http://smartdefine.org/collimator/definitions/1989023
Chicago	Webster's. 2011. "collimator" http://smartdefine.org/collimator/definitions/1989023 (accessed September 21, 2026).
Harvard	Webster's 2011, collimator, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/collimator/definitions/1989023>.
MLA	Webster's. "collimator" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/collimator/definitions/1989023>

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