“astigmatic interval”的概念、定义、翻译、参考文献-科学参考

单词	astigmatic interval
释义	astigmatic interval [¦a·stig´mad·ik `in·tǝr·vǝl] ^OPTICS The portion of a pencil of rays in an astigmatic optical system that lies between the primary and secondary foci. Also known as conoid of Sturm; interval of Sturm.
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