collimator

Other Definitions
collimator (enc)

Noun	1.	collimator - a small telescope attached to a large telescope to use in setting the line of the larger one telescope, scope - a magnifier of images of distant objects
	2.	collimator - 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 optical device - a device for producing or controlling light prism spectroscope, spectroscope - an optical instrument for spectrographic analysis

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