Measurement of the scattering angle of the optical radiation by means of the Bragg diffraction V. M. Kotov, G. N. Shkerdin, E. V. Kotov Branch of the Institute of Radio Engineering and Electronics, 1 Vvedensky sq., Fryazino, Moscow region, 141195, Russia E-mail: vmk277@ire216.msk.su Proposed is a method of the measurement of the scattering angle of the optical radiation. <...> It is based on the using of two Bragg diffraction processes occurred in the crystal at different incident angles respect to the acoustic wave. <...> In the limited case, when two diffraction orders are observed simultaneously, which disappeared at small angular tuning out, the angular distance between the first diffraction orders is equal to the angle of the divergence of the incident light. <...>