Diffracted light intensity detection system and single-slit diffracted light path system

The utility model discloses a diffracted light intensity detection system and a single-slit diffracted light path system. The diffracted light intensity detection system comprises a control unit, a light intensity detection module, a moving device and a display module, the moving device comprises a driving device, a screw rod and a nut; the nut is in threaded connection with the screw rod; one endof the screw rod is connected with the driving device; wherein the light intensity detection module is fixed on the nut, the light intensity detection module is connected with the input end of the control unit, the driving device and the display module are respectively connected with the output end of the control unit, and the control unit controls the driving device to drive the lead screw to rotate to enable the nut to translate so as to drive the light intensity detection module to translate. According to the diffracted light intensity detection system, the motor is controlled by the control unit to rotate at a co