Some aspects of tunable acousto-optic filters performance are considered and applications to optical image filtration devices are described in this paper. Among various types of acoustooptic devices, tunable acousto-optic filters seem to be very attractive. As compared with spectral devices of other classes acousto-optic filters appear superior because of the following advantages; Universality, relative simplicity in construction and reliability. The spectral bandwidth of acousto-optic filters Dl in the visible region is no more than Dl 0, Inm while the resolution R= l/Dl can exceed the value R = 103. The transmission coefficient of a filter is determined as a light flux transmitted by the filter divided by light incident on the device. Transmission T may be done close to T= 100%.
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