英语词汇“crown lens”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	crown lens
释义	crown lens noun A lens made of crown glass and usually forming one component of an achromatic lens.After polishing the crown lens, a new lap - convex - is made and the third surface polished.... After crown lenses are chemtempered, suspend them over the chemical bath for at least 15 minutes. Now lower the mating surface of the crown lens onto this puddle without entrapping air and let the lens settle into the oil unaided.
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