<title>Transmission function of a generalized acousto-optical device</title>

In order to calculate information transmission through an acousto-optical device and find the places of main information losses it is necessary to follow the way in which the signal transmits through such a device. The signal transmission is described by means of consideration of signal transmission function. The way of the signal is divided into several chains each of which performs the certain conversion of the signal corresponding to the certain physical process. The transmission functions of separate chains are calculated from the point of view of description of information transmission through an acousto-optical device.