collimator – מילון אנגלי-אנגלי
collimator
n.
telescope used for adjusting other instruments
Collimator
A
collimator is a device that narrows a beam of particles or waves. To "
narrow" can mean either to cause the directions of motion to become more aligned in a specific direction (i.e., make
collimated light or
parallel rays), or to cause the spatial
cross section of the beam to become smaller (
beam limiting device).
collimator
Noun
1. a small telescope attached to a large telescope to use in setting the line of the larger one
(hypernym) telescope, scope
(derivation) collimate
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
(hypernym) optical device
(part-holonym) spectroscope, prism spectroscope
Collimator
(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.
(n.)
A telescope arranged and used to determine errors of collimation, both vertical and horizontal.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
About
collimator
A device that renders divergent or convergent rays more nearly parallel. (
188 )
Note: The degree of
collimation (parallelism) should be stated.
