Spatially modulated illumination device

A device for illuminating an object, the device being configured to be lit by a light source, the light source emitting light in an emission spectral band, the device comprising:

• a pixellated photodetector, comprising detection pixels distributed along a detection surface;
• a modulator, formed from a matrix of modulation pixels, interposed between the light source and the pixellated photodetector, each modulation pixel comprising a material an optical property of which varies depending on an electrical command applied to said modulation pixel;
• a control unit, configured to activate each modulation pixel depending on a light intensity detected by the detection pixels, so as to modify a light transmission of at least one modulation pixel;
• wherein:
• the detection surface transmits part of the light in the emission spectral band, so that the light transmitted by the pixellated photodetector illuminates the object;
• so that the device is configured to be placed between the light source and the object.