英语词汇“aperture ratio”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	aperture ratio
释义	aperture ratio aperture ratio (relative aperture) The ratio d /f of the effective diameter (i.e. aperture), d , of a lens or mirror to its focal length, f . The ratio f /d is the focal ratio. aperture ratio [′ap·ə‚chər ′rā·shō] (optics) The ratio of the effective diameter of a lens to its focal length.
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