An imaging system according to the present disclosure includes: a polarized light source which emits illuminating light including a component of light that oscillates parallel to a first polarization axis； an image capturing unit IP which is configured to get simultaneously first, second, third and fourth pieces of image information S101, S102, S104 including pieces of information about light beams that fall within first, second, third and fourth wavelength ranges, respectively, based on light beams that have returned at the same point in time from an object that is irradiated with the illuminating light, the light beam falling within the fourth wavelength range having been emitted from the polarized light source and reflected from the object, oscillating parallel to a second polarization axis that is different from the first polarization axis, and belonging to the same wavelength range as the component of the illuminating light.
