英语词汇“afocal system”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	afocal system
释义	afocal system afocal system (ay-foh -kăl) An optical system in which both the object and the secondary image are infinitely distant. It is the usual adjustment in a simple refracting telescope and is produced when the objective and eyepiece lenses are separated by the sum of their focal lengths: the lenses are then confocal. afocal system [′ā·fō·kəl ′sis·təm] (optics) An optical system of zero convergent power, for example, a telescope.
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