测量光棚一种特殊的光电传感器，主要用于检测，测量产品是否符合规定要求。与普通的对射式光电传感器一样，包含相互分离且相对放置的发射器和受光器两部分。但其外形尺寸较大，为长管状。检测，测量光栅发射器产生的检测光线并非如普通光电传感器只有一束, 而是沿长度方向定间距生成光线阵列，形成一个“光幕”，以一种扫描的方式配合控制器及
其软件，实现检测和测量物体外形尺寸的功能。
    A speclal photoelectric sensor for measuring light shed, mainly used for detecting and measuring whether the product meets the specified requirements. Like an ordinary through-beam photoelectrlc sensor, it consists of two parts: a transmitter and a recelver that are separated and placed opposite each other. However, its external dimensions are rlatively large, and it is long and tubular. For detection, the detection light generated by the measuring grating transmitter is not only one beam like an ordinary photoelectrle sensor, but a light array is generated at regular intervals along the length to form a “light curtain",which cooperates with the controller and its sftware in a scanning manner. Realize the function of deteting and measuring the dimensions of objects.