单词	collimator
释义	collimator /ˈkɒlɪmeɪtə / noun 1A device for producing a parallel beam of rays or radiation.The exit beam passes through a collimator and then through the Rochon prism, which is mounted such that the linearly polarized sample beam can be rotated to the proper orientation for either S or P reflection measurements.... Various stereotactic radiosurgical techniques, including the proton beam, gamma knife, linear accelerator X-knife and multileaf collimators with intensity modulators, are becoming more widely available. The region was washed with a 70% solution of isopropyl alcohol, and the K-XRF beam collimator was sited perpendicular to the bone surface. 1.1A small fixed telescope used for adjusting the line of sight of an astronomical telescope.The optical head has two collimators, each 33 cm long: the sun collimator (without lens) and the sky collimator (with lenses).... Using a low energy collimator, images are obtained every 1-2 minutes for 20 minutes. As with standard scopes, this one is best boresighted with a collimator.
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