Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back An acoustooptical device parallel frequency analysis R.A. GASANOV, S.R. VELIYEVA, S.M. GASANOVA The actuality of the small-scale parallel frequency analysis of a given frequency band in the context of the organization of electronic warfare is justified. The interaction of acoustic and light waves in photo-elastic media is discussed and shows the features of the photoelastic effect that supports the parallel frequency analysis. It was shown that by changing the geometry of the acousto-optic interaction can be obtained photo-elastic effect at different frequencies of the input signal and generate an output response with various delay times. These features photo-elastic effect used for the construction of small-scale acousto-optic device parallel frequency analysis and proposed his scheme. This device implements a certain number of parallel channels for processing the input signal. The possible range of frequency input signal is divided into sub-bands. The number of channels is selected equal to the number of sub-bands. Each channel signal responds within its sub-band. By selecting the angle of incidence of the laser beams in the acoustoptic modulator aperture provides processing of the input signal at different frequencies selected sub-bands. Thus the laser beams intersect an aperture acousto-optic modulator at different distances from the inlet of electro-acoustic transducer. As a result, the respective outputs of the various channels behind the input signal at different times. Rejected light beams directed through the opening in the diaphragm to the surface of the photo-detector using opaque mirror. With such a disposition corresponding to the various channels of the photo-detector output signals will have different delays. By the delay time of a video impulse at the photo-detector output is making a decision signal of a certain frequency at the input of the analyzer. Build a model of small-scale three-channel acousto-optic device parallel frequency analysis. The results of experimental studies that clearly demonstrate the effectiveness of the proposed method of parallel small-scale frequency analysis are given. Keywords: Frequency analyses, acoustooptic, laser, photoreceiver, modulation, Brag angle, diffraction, delay, impulse. Contacts: E-mail: hasanov@naa.edu.az Pp. 19-24.