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collimator

DEFINITIONS OF: collimator

1

n 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

Type of:
optical device
a device for producing or controlling light

n a small telescope attached to a large telescope to use in setting the line of the larger one

Type of:
scope, telescope
a magnifier of images of distant objects
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