Far-field active imaging system

The utility model belongs to the technical field of imaging, and particularly relates to a far-field active imaging system which comprises an illumination module, an imaging module and a driving module, the illumination module is used for emitting an illumination light beam to an imaging target, and the imaging module is used for obtaining an image of the imaging target illuminated by the light beam. The driving module is used for driving the imaging module to move according to a preset path so as to enable the imaging module to acquire images of the imaging target at different positions on the preset path; the imaging module comprises an image detector and a lens assembly, and further comprises an optical filter and a polaroid; the optical filter is used for filtering ambient light, the polarization direction of the polaroid is adjustable, and the optical filter and the polaroid are located between the image detector and the lens assembly, or located in front of the lens assembly, or located in the lens asse