COLLIMATOR
collimator
(noun) optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens; light rays leave the slit as a parallel beam
collimator
(noun) a small telescope attached to a large telescope to use in setting the line of the larger one
Source: WordNet® 3.1
Etymology
Noun
collimator (plural collimators)
(physics) An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence.
(physics) A similar device that produces a parallel beam of particles such as neutrons.
(astronomy) A small telescope attached to a larger one, used to point it in the correct general direction.
Anagrams
• microatoll, mortal coil
Source: Wiktionary
Col"li*ma`tor, n.
1. (Astron.)
Definition: A telescope arranged and used to determine errors of collimation, both vertical and horizontal. Nichol.
2. (Optics)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition
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