Imaging system and synchronization control method

A synchronization control method in an imaging system, the imaging system including:

• a first light source which emits visible light to irradiate a subject;
• and
• a second light source which emits excitation light in an infrared region and which causes a fluorescent substance administered to the subject to emit fluorescence;
• first and second imaging devices configured to image the subject;
• and
• first and second devices processors provided corresponding to the first and second imaging devices, and configured to process an imaged video of the subject imaged by either of the corresponding imaging devices and to output the processed video to an output unit,
• the synchronization control method comprising:
• generating and transmitting a genlock signal via a single genlock transmitter which is provided in the first video processor;
• receiving, from the single genlock transmitter, the genlock signal via a single genlock receiver which is provided in the second video processor;
• controlling, via the first video processor:
• the lighting of each of the first and second light sources such that they alternately perform lighting in synchronization with a frame period of the imaged video or an integer multiple of the frame period of the image video based on the genlock signal;
• and
• imaging of either of the corresponding imaging devices based on the genlock signal;
• performing imaging in synchronization with the lighting of each of the first and second light source devices by the first imaging device;
• and
• performing imaging in synchronization with the lighting of each of the first and second light source devices by the second imaging device.