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外差干涉仪
释义
外差干涉仪
Encyclopedia
理学
〔光学仪器〕
释
heterodyne interferometer
外差干涉仪
使用两种不同频率的单色光分别作为测量光束和参考光束,通过光电探测器的混频,输出差频信号的干涉仪。又称双频干涉仪、交流干涉仪。
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