英语词汇“beam diameter”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	beam diameter
释义	DictionarySeebeam width beam diameter beam diameter [′bēm dī‚am·əd·ər] (optics) The distance between points on opposite sides of a light beam at which the power per unit area drops to 1/ e (0.37) times its maximum value.
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