IC693PCM311RR PLC控制器參數(shù)

反射式液體透鏡是一個焦距可變的鏡面。當裝有液體（一般是水銀）的容器旋轉的時候，離心力的作用將使液體表面形成一個正好符合望遠鏡要求的理想凹面。反射式的液體透鏡只需改變旋轉速度，就能使液面的形狀改變成需要的形狀，這可以大大降低制造大型天文望遠鏡的加工難度和成本。

透射式液體透鏡按照液體變焦驅(qū)動機制的不同，液體變焦鏡頭分為物性控制式和機械驅(qū)動式，如圖1所示。其中，物性控制式變焦鏡頭包括基于液晶材料、電化學活化、介電泳技術和電潤濕技術的液體變焦透鏡。機械驅(qū)動式變焦鏡頭包括基于靜電力驅(qū)動、電磁力驅(qū)動、壓力調(diào)節(jié)和環(huán)境響應液體變焦透鏡。

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