Imaging system

An imaging system comprising:

• a light source apparatus which irradiates a predetermined image pickup target with light including a component in at least a portion of a wavelength band of an excitation wavelength of each of a plurality of types of fluorescent materials including a first fluorescent material emitting fluorescence belonging to a near-infrared wavelength band and a second fluorescent material emitting fluorescence belonging to a visible light wavelength band;
• and
• an image pickup apparatus which picks up an image acquired by a predetermined optical system unit,
• wherein the image pickup apparatus includes
• a branching optical system that includes a dichroic film separating the light belonging to the visible light wavelength band and the light belonging to the near-infrared wavelength band from each other,
• a first image pickup element which is provided at a stage after the branching optical system and on which the light belonging to the near-infrared wavelength band which is separated by the dichroic film is imaged, and
• a second image pickup element which is provided at a stage after the branching optical system and on which at least a portion of the light belonging to the visible light wavelength band which is separated by the dichroic film is imaged,
• a fluorescent image of the fluorescence emitted from the first fluorescent material is picked up by the first image pickup element, and
• a fluorescent image of the fluorescence emitted from the second fluorescent material is picked up by the second image pickup element.