Meaning & use
collimator
Last updated
A device that narrows a beam of light, particles, or radiation so that it travels in parallel lines.
See it in a sentence
The physicist adjusted the collimator to focus the laser into a straight, narrow beam.
X-ray machines use a collimator to reduce the radiation dose to surrounding tissue.
A note on using this word
Common in optics, physics, and medical imaging; a technical term rather than everyday vocabulary.
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