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Collimator   Listen
Collimator

noun
1.
A small telescope attached to a large telescope to use in setting the line of the larger one.
2.
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.





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"Collimator" Quotes from Famous Books



... telescope from 3 to 6 in. aperture. The collimator and observing telescope have an aperture of 25 mm., focus of 200 mm. Both are fitted with rack and pinion. The spectroscope may be used with a grating or a 60 degree prism, and for this purpose has openings for the telescopes at the proper angles. ...
— Astronomical Instruments and Accessories • Wm. Gaertner & Co.


Words linked to "Collimator" :   optical device, telescope, prism spectroscope, scope, collimate, spectroscope


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