Black mark detects photoelectric sensor

The utility model discloses a black mark detects photoelectric sensor relates to components and parts technical field, include: first convex lens, second convex lens, infrared transmission module, infrared receiver module, low pass filter, signal amplification circuit and output module, infrared transmission module sets up in one side of first convex lens, and infrared receiver module sets up in one side of second convex lens, and the opposite side of first convex lens and the opposite side of second convex lens are all with to wait to detect paper relative, infrared receiver module's output with low pass filter's input is connected, low pass filter's output with signal amplification circuit's input is connected, signal amplification circuit's output with output module's input is connected, output module's output is used for being connected with outside controller. The utility model provides the high accuracy of black mark detection, it is high to detect the precision. 本实用新型公开了种黑标检测光电传感器，涉及元器件技术领域，包括：第凸透镜、第二凸