描述
计量光栅通常用于数字检测系统，用来检测高精度直线位移和角位移，是数控机床上应用较多的一种检测装置。光栅传感器的空间分辨率一般可达1μm左右，单根光栅的长度可达600mm以上，主光栅能够进行拼接，测量范围可达几米以上。如图所示光栅由4光源，透镜，2指示光栅，3光电元件，驱动电路和1标尺光栅组成
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