英语词汇“numeric aperture”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	numeric aperture
释义	numeric aperture nu·mer·ic ap·er·ture (N.A.), defined by the formula n sine a, where n is the refractive index of the medium between the object and objective lens and a is the angle between the central and the marginal rays entering the objective.
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numeric aperture