An acousto-optic imaging method for imaging an observation area of a medium, the method comprising: - an acquisition step during which a plurality of measurement signals, associated with a plurality of non-focused acoustic waves propagating in non collinear directions (θ), is acquired, the acquisition step comprising a plurality of measurement operations such that, in each measurement operation of the plurality of measurement operations: - a non-focused acoustic wave propagating in a propagation direction (θ) is generated in the observation area, - an incident light wave is emitted in the observation area in order to generate a marked light wave comprising at least one acoustic-optical component shifted in frequency by the non-focused acoustic wave, - a measurement signal, associated with said non-focused acoustic wave, containing information about the marked light wave is acquired; and - a processing step during which at least one value representative of a light intensity in the observation area is determined from said plurality of measurement signals, the processing step comprising: - determining a plurality of profile slices, each profile slice being a function of a one-dimensional Fourier transform of an associated measurement signal acquired for a non-focused acoustic wave propagating along an associated propagation direction; - determining a two-dimensional spectrum from the plurality of profile slices, and - determining said at least one value representative of a light intensity in the observation area, said representative value being a function of a two-dimensional inverse Fourier transform of the two-dimensional spectrum. - an acquisition step during which a plurality of measurement signals, associated with a plurality of non-focused acoustic waves propagating in non collinear directions (θ), is acquired, the acquisition step comprising a plurality of measurement operations such that, in each measurement operation of the plurality of measurement operations: - a non-focused acoustic wave propagating in a propagation direction (θ) is generated in the observation area, - an incident light wave is emitted in the observation area in order to generate a marked light wave comprising at least one acoustic-optical component shifted in frequency by the non-focused acoustic wave, - a measurement signal, associated with said non-focused acoustic wave, containing information about the marked light wave is acquired; and - a non-focused acoustic wave propagating in a propagation direction (θ) is generated in the observation area, - an incident light wave is emitted in the observation area in order to generate a marked light wave comprising at least one acoustic-optical component shifted in frequency by the non-focused acoustic wave, - a measurement signal, associated with said non-focused acoustic wave, containing information about the marked light wave is acquired; and - a processing step during which at least one value representative of a light intensity in the observation area is determined from said plurality of measurement signals, the processing step comprising: - determining a plurality of profile slices, each profile slice being a function of a one-dimensional Fourier transform of an associated measurement signal acquired for a non-focused acoustic wave propagating along an associated propagation direction; - determining a two-dimensional spectrum from the plurality of profile slices, and - determining said at least one value representative of a light intensity in the observation area, said representative value being a function of a two-dimensional inverse Fourier transform of the two-dimensional spectrum. - determining a plurality of profile slices, each profile slice being a function of a one-dimensional Fourier transform of an associated measurement signal acquired for a non-focused acoustic wave propagating along an associated propagation direction; - determining a two-dimensional spectrum from the plurality of profile slices, and - determining said at least one value representative of a light intensity in the observation area, said representative value being a function of a two-dimensional inverse Fourier transform of the two-dimensional spectrum.