| 单词 | collimator |
| 释义 | Word Frequency collimator(ˈkɒlɪˌmeɪtə) noun 1. a small telescope attached to a larger optical instrument as an aid in fixing its line of sight 2. an optical system of lenses and slits producing a nondivergent beam of light, usually for use in spectroscopes 3. any device for limiting the size and angle of spread of a beam of radiation or particles |
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