The invention relates to an acoustic-optical imaging method and system of a zone for observing an environment. The system includes an acquisition device comprising, a network of transducers for generating a plurality of non-focussed sound waves, a light-emitting device for emitting an incident light wave and generating marked light waves comprising an acoustic-optical component that is shifted in frequency by the non-focussed sound waves, and a detector for acquiring measurement signals. The system also comprises a processing device for determining a light intensity in the observation zone from the measurement signals.
