Centering correction light curtain and principle

The centering and correcting light curtain belongs to the kind of measuring light curtain, and the purpose of correcting the strip is achieved by automatically controlling the correcting device for the amount of light blocking by the strip through the principle of infrared light blocking.        

What is the alignment and correcting the light curtain?
　　The centering and correcting light curtains are corrected by one or more sets of light curtains. A set of light curtains contains transmitters and receivers, which are divided into different distances, such as 2.5mm, 5mm, and 10mm. Output methods include: RS485 communication, switching, analog, high and low. Second, what is the principle of correcting the light curtain? The principle of the centering correction light curtain is mainly in the case where the strip is displaced, the light curtain emitter emits infrared rays, and the receiver receives the signal.