描述
由光通量對光電元件的作用原理不同所制成的光學測控系統(tǒng)是多種多樣的,按光電元件(光學測控系統(tǒng))輸出量性質(zhì)可分二類，即模擬式光電傳感器和脈沖(開關(guān))式光電傳感器。模擬式光電傳感器是將被測量轉(zhuǎn)換。
成連續(xù)變化的光電流，它與被測量間呈單值關(guān)系.模擬式光電傳感器按被測量(檢測目標物體)方法可分為透射(吸收)式，漫反射式，遮光式(光束阻檔)三大類。所謂透射式是指被測物體放在光路中，恒光源發(fā)出的光能量穿過被測物，部份被吸收后，透射光投射到光電元件上；所謂漫反射式是指恒光源發(fā)出的光投射到被測物上，再從被測物體表面反射后投射到光電元件上；所謂遮光式是指當光源發(fā)出的光通量經(jīng)被測物光遮其中一部份，使投射到光電元件上的光通量改變，改變的程度與被測物體在光路位置有關(guān)。
光電傳感器
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