Guiding sheath tube, endoscope assembly, application method of endoscope assembly and detection system

The invention relates to the technical field of endoscopes, in particular to a guiding sheath tube, an endoscope assembly, a using method of the endoscope assembly and a detection system.The guiding sheath tube comprises a base body, a cavity channel is formed in the base body, a first mark and a light path hole are formed in the inner wall of the cavity channel, and an incident light path channel and a reflected light path channel are formed in the base body; the reflected light path channel corresponds to the detection unit, and the incident light path channel and the reflected light path channel are respectively communicated with the light path hole. According to the method, the image transmission delay of the camera module can be accurately detected in the process that the insertion part of the endoscope is placed into the guide sheath tube, compared with the prior art, the detection time node is advanced, the accurate time value of the image transmission delay of the camera module of the insertion part c