FIELD: acoustooptics. SUBSTANCE: acoustooptical spectrometer includes forming optics, acoustooptical filter, photodetector installed in succession in path of light beam, control unit connected to acoustooptical filter and register linked to photodetector and control unit. It is provided with polarization converter, signal generator, inverting amplifier, first and second key circuits, integrator with integration time at least twofold greater than oscillation period of signal generator. Polarization converter is placed ahead of acoustooptical filter and is coupled to output of signal generator to which controlling input of first key circuit and controlling input of second key circuit through inverting amplifier are connected. Signal inputs of first and second key circuits and integrator are linked to output of photodetector and their outputs - to inputs of register. Second output of control unit is connected to signal generator. EFFECT: enhanced operational stability. 2 dwg
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