bsolute optical frequency measurement 絕對(duì)光頻測(cè)量; 絕對(duì)光頻測(cè) dOqOw M.y  
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absorpting loss in optical thin-film 光學(xué)薄膜的吸收損耗 8'~[pMn`  
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console optical-display plotter 控制臺(tái)光顯示繪圖儀 kspTp>~  
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continuous variable optical attenuator 連續(xù)可變光衰減器 @b"t]#V(E  
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continuous-wave optical ranging system 連續(xù)波光學(xué)測(cè)距系統(tǒng) ]