Laser scanning system comprising: - a first acousto-optical deflector adapted to deflect an input beam in a first direction to obtain a first deflected beam, the first acousto-optical deflector comprising a first acousto-optical crystal and a first transducer adapted to command the first acousto-optical crystal by applying a first acoustic wave having a variation in frequency over time according to a first law of command, and - a second acousto-optical deflector adapted to deflect the first deflected beam in a second direction to obtain a second deflected beam, the first direction and the second direction define at least an angle (α) comprised between 85° and 95° and the second acousto-optical deflector comprising a second acousto-optical crystal and a second transducer adapted to command the second acousto-optical crystal by applying a second acoustic wave having a variation in frequency over time according to a second law of command, wherein the two acousto-optic deflectors (30, 32) introduce a defocusing in the input beam and the laser scanning system comprises a compensating unit for compensating the defocusing introduced by the two acousto-optic deflectors (30, 32), characterized in that the first law of command and the second law of command are chosen so that the speed of the laser scanning system is superior to 10 radians per second, and in that the compensating unit comprises an objective and a translation device configured to modify the position of the objective with respect to the two acousto-optic deflectors (30, 32) by a quantity of - Δz, Δz being the defocusing introduced by the two acousto-optic deflectors (30, 32) and being such that: Δ z = F tan arcsin NA n ∗ Δθ wherein: • F is the focal distance of the objective; • NA is the numerical aperture of the objective; • n is the refractive index of the medium of immersion of the objective, and • Δθ is the angular variation between the ray entering at the center of the objective aperture and the ray passing at the edge of its effective back-aperture. - a first acousto-optical deflector adapted to deflect an input beam in a first direction to obtain a first deflected beam, the first acousto-optical deflector comprising a first acousto-optical crystal and a first transducer adapted to command the first acousto-optical crystal by applying a first acoustic wave having a variation in frequency over time according to a first law of command, and - a second acousto-optical deflector adapted to deflect the first deflected beam in a second direction to obtain a second deflected beam, the first direction and the second direction define at least an angle (α) comprised between 85° and 95° and the second acousto-optical deflector comprising a second acousto-optical crystal and a second transducer adapted to command the second acousto-optical crystal by applying a second acoustic wave having a variation in frequency over time according to a second law of command, wherein the two acousto-optic deflectors (30, 32) introduce a defocusing in the input beam and the laser scanning system comprises a compensating unit for compensating the defocusing introduced by the two acousto-optic deflectors (30, 32), characterized in that the first law of command and the second law of command are chosen so that the speed of the laser scanning system is superior to 10 radians per second, and in that the compensating unit comprises an objective and a translation device configured to modify the position of the objective with respect to the two acousto-optic deflectors (30, 32) by a quantity of - Δz, Δz being the defocusing introduced by the two acousto-optic deflectors (30, 32) and being such that: Δ z = F tan arcsin NA n ∗ Δθ wherein: • F is the focal distance of the objective; • NA is the numerical aperture of the objective; • n is the refractive index of the medium of immersion of the objective, and • Δθ is the angular variation between the ray entering at the center of the objective aperture and the ray passing at the edge of its effective back-aperture. • F is the focal distance of the objective; • NA is the numerical aperture of the objective; • n is the refractive index of the medium of immersion of the objective, and • Δθ is the angular variation between the ray entering at the center of the objective aperture and the ray passing at the edge of its effective back-aperture.