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collimated beam

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collimated beam [′käl·ə‚mād·əd ′bēm]
(physics)
A beam of radiation or matter whose rays or particles are nearly parallel so that the beam does not converge or diverge appreciably.


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Reference standards are typically calibrated against the primary standards by means of collimated beams, but are used with divergent beams characteristic of laser light exiting an optical fiber.
Resolving the signal requires longer path-lengths and highly collimated beams.
A judge was told how the container was "found to be emitting a narrow collimated beam of radiation, of a very high dose rate, vertically down from that package base".
 
 
 
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