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WordReference Random House Unabridged Dictionary of American English © 2024col•li•ma•tor (kol′ə mā′tər),USA pronunciation n. - Optics
- a fixed telescope for use in collimating other instruments.
- an optical system that transmits parallel rays of light, as the receiving lens or telescope of a spectroscope.
- Physicsa device for producing a beam of particles in which the paths of all the particles are parallel.
Collins Concise English Dictionary © HarperCollins Publishers:: collimator /ˈkɒlɪˌmeɪtə/ n - a small telescope attached to a larger optical instrument as an aid in fixing its line of sight
- an optical system of lenses and slits producing a nondivergent beam of light, usually for use in spectroscopes
- any device for limiting the size and angle of spread of a beam of radiation or particles
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