The free-space acousto-optic modulator of CSRayzer adopts high-performance acousto-optic crystal, which can dynamically realize the deflection of the propagation direction of light beam and the regulation of the frequency of light field by using Bragg diffraction of acousto-optic effect. Especially in quantum optics and quantum precision measurement, the acousto-optic modulator is widely used, including quantum storage probe light detection, single photon beat frequency detection, Doppler frequency shift, cold atom and other optical systems. The AOM of CSRayzer has high diffraction efficiency, covering the wavelength of 350-2000nm, and can be customized according to the needs of users with various wavelengths and different sizes.