Definition of Collimator

Col´li`ma`tor
n.1.(Astron.) A telescope arranged and used to determine errors of collimation, both vertical and horizontal.
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.


Related Words

collimate, scope, telescope


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colliding-beam machine
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