Bible Dictionaries
Collimator
Webster's Dictionary
(1):
(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.
(2):
(n.) A telescope arranged and used to determine errors of collimation, both vertical and horizontal.
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Bibliography Information
Webster, Noah. Entry for 'Collimator'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/c/collimator.html. 1828.