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单词 active optics
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active optics
active optics n. Astronomy an automatic system for keeping a reflecting surface in a telescope free from distortion due to gravity or other environmental effects, using small pistons which continuously adjust the position of each part of the surface; cf. adaptive optics n. at adaptive adj. Compounds.
ΚΠ
1968 H. J. Robertson in Symp. Support & Testing Large Astron. Mirrors 245 (title) Active optics for large orbiting astronomical telescopes.
1987 Times (Nexis) 28 Dec. Its main telescopic imaging system is reported to have a ground resolution of about six inches, mainly due to the incorporation of an advanced technology known as active optics.
2002 Wired Nov. 174/2 To keep the segments aligned, he used dozens of tiny computer-controlled actuators, or pistons—an innovation known as active optics.
extracted from activeadj.n.
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