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Acousto-optic modulator

Acousto-optic modulators are (AOMs) devices responsive to electrical signals to change the direction and intensity of the beam of radiation, such as a laser beam. Often such modulators are used to control the direction of a beam in the form of a scanner or intensity modulator. Acousto-optic modulators have been employed to control the respective intensities of multiple color components of multi-color laser projector systems. This is typically accomplished by using a respective modulator for each color or wavelength, and then recombining each of the beams into a single output beam by means of dichroic beam combiners. In such a modulator for multichannel laser beam systems, electrical energy is converted to acoustic waves by a piezoelectric transducer, and the acoustic waves modulate the incident laser (light) beams.

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