Revised and updated, this second edition first explains heuristically the physics of acousto-optics before presenting the mathematics of the formal theory. The material is integrated to illustrate and promote the development of new ideas, concepts, theories, inventions and devices. The text also offers sections on the Near-Bragg regime and curved sound wave fronts, coverage of the numerical approach, selected applications, coverage of anisotropic Bragg diffraction, and material on spectral formalisms.