Imaging system

An endoscope system comprising:

• a light source configured to emit light including a component in at least a first excitation wavelength band to excite a first fluorescence material emitting a first fluorescence belonging to a near-infrared wavelength band, and to emit light including a component in at least a second excitation wavelength band to excite a second fluorescence material emitting a second fluorescence belonging to a biological window wavelength band and being less than the near-infrared wavelength band of the first fluorescence;
• a camera including:
• a first image sensor configured to receive light including a component of a visible wavelength band and output a first imaging signal,
• a second image sensor configured to receive light including a component of the first fluorescence and a component of the second fluorescence, and output a second imaging signal,
• an optical element configured to separate light, received via an endoscope scope, including the first fluorescence into a first optical branch and light including the second fluorescence into a second optical branch, and
• a dichroic film configured to separate light including the first fluorescence and the second fluorescence into a first optical branch and light including the visible wavelength band into a second optical branch;
• a pass filter to transmit light that includes the biological window wavelength band and block light in the visible wavelength band that includes green and blue light;
• and
• camera control circuitry configured to obtain a visible image signal generated based on a signal captured by the first image sensor or a first fluorescence image signal and a second fluorescence image signal generated based on a signal captured by the second image sensor.

An endoscope device comprising:

• a camera including:
• a first image sensor configured to receive light including a component of a visible wavelength band,
• a second image sensor configured to receive light including a component of a wavelength band of a first fluorescence and a component of a wavelength band of a second fluorescence, and output a second imaging signal, the first fluorescence belonging to a near-infrared wavelength band emitted from a first fluorescence material by first excitation light of a first excitation wavelength band and the second fluorescence belonging to a biological window wavelength band emitted from a second fluorescence material by second excitation light of a second excitation wavelength band, the second fluorescence being less than the near-infrared wavelength band of the first fluorescence
• a dichroic film configured to separate light including the first fluorescence and the second fluorescence into a first optical branch and light including the visible wavelength band into a second optical branch, and
• a pass filter to transmit light that includes the biological window wavelength band and block light in the visible wavelength band that includes green and blue light.