測量光棚一種特殊的光電傳感器，主要用于檢測，測量產品是否符合規定要求。與普通的對射式光電傳感器一樣，包含相互分離且相對放置的發射器和受光器兩部分。但其外形尺寸較大，為長管狀。檢測，測量光柵發射器產生的檢測光線并非如普通光電傳感器只有一束, 而是沿長度方向定間距生成光線陣列，形成一個“光幕”，以一種掃描的方式配合控制器及
其軟件，實現檢測和測量物體外形尺寸的功能。
    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.