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Wave vector diagram of bi-polarization anisotropic acousto-optical (AO) diffraction. kio, kie, kdo, kde—wave vectors of incident (i) and diffracted (d) light waves of ordinary (o) and extraordinary (e) polarization; q—wave vector of acoustic wave; θ—angle of incidence; γ—angle of acoustic wave propagation, δo-e, δe-o—deflection angles for o→e and e→o modes of diffraction, respectively.
