An imaging system includes a light source for outputting initial pulsed light, a polarization control unit for rotating a polarization plane of the initial pulsed light, an optical pulse shaping unit for inputting the initial pulsed light with the rotated polarization plane, and outputting first pulsed light Lp1 having a first polarization direction and second pulsed light Lp2 having a second polarization direction different from the first polarization direction with a time, an irradiation optical system for irradiating an imaging object with the pulsed light Lp1 and the pulsed light Lp2, a light separation element for separating the pulsed light Lp1 and the pulsed light Lp2 reflected by or transmitted through the imaging object on the basis of the polarization directions, an imaging unit for imaging the pulsed light Lp1, and an imaging unit for imaging the pulsed light Lp2.