Development of two-channel acousto-optic spectral devices with enhanced functionality is described. Approaches to development of multifunctional acousto-optic devices capable to register different types of optical information (spatial distribution, spectra, polarisation characteristics) are discussed. Opportunities to register multi-dimensional complementary data based on Bragg light diffraction on ultrasonic waves in a uniaxial crystal are analysed. It is demonstrated that such approach may be developed on the basis of implementation of simultaneous diffraction of two light beams in planes rotated relative to each other by a small angle. Such enhancement of the acousto-optic filter operational concept allows to go beyond the classic constraints imposed on their characteristics. 1. Davies, E.R. Computer and Machine Vision: Theory, Algorithms, Practicalities // Elsevier, 2012, 912 p.
2. Steger, C., Ulrich, M., Wiedemann, C. Machine Vision Algorithms and Applications // Wiley-VCH, 2018, 370 p.
3. Yoon, S., Thai, C. Stereo spectral imaging system for plant health characterization. // Proceedings of 2009 ASABE Annual International Meeting, 2009, # 096583.
4. Mazur, M.M., Pozhar, V.E. Spectrometers Based on Acousto-optic Filters [Spektrometry na akustoopticheskikh filtrakh] // Izmeritelnaya teknika, 2015, Vol. 9, pp. 29–33.
5. Mazur, M.M., Shorin, V.N., Pustovoit, V.I., Pozhar, V.E., Fadeev, A.V. Gas-analysing Acousto-optic Spectrometer [Gazoanaliticheskiy akustoopticheskiy spektrometr] // Pribory i tekhnika eksperimenta, 2011, Vol. 54, # 2, pp. 140–146.
6. Measurement of Ethanol Concentration in Alcoholcontaining Liquids [Izmereniye kontsentratsii etanola v spirtosoderzhashchikh zhidkostyakh]. In: Spectral Acousto-optic Processors [Akustoopticheskiye protsessory spektralnogo tipa]. Eds. V.V. Proklov, V.N. Ushakov // Radiotekhnika, 2012, pp. 170–176.
7. Voloshinov, V., Molchanov, V., Mosquera, J.C. Spectral and polarization analysis of optical images by means of acousto-optic // Optics and Laser Technology, 1996, Vol. 28, # 2, pp. 119–127.
8. Viskvatykh, A.V., Machikhin, A.S., Pozhar, V.E., Pustovoit, V.I., Viskovatykh, D.A. Combined Coherent and Spectral Optical Microscopy on the Basis of Tuneable Acousto-optic Image Filters [Kombinirovannaya opticheskaya kogerentnaya i spektralnaya mikroskopiya na osnove perestraivaemykh akustoopticheskikh filtrov izobrazheniy] // ZhTF Letters, 2014, Vol. 40, # 4, pp. 33–41.
9. Machikhin, A.S., Batshev, V.I., Pozhar, V.E., Mazur, M.M. Full-field Acousto-optic Stereoscopic Spectrometer for Restoration of the Volumetric Structure of Objects in Arbitrary Spectral Ranges [Akustoopticheskiy stereoskopicheskiy spektrometr polnogo polya dlya vosstanovleniya obyomnoy struktury obyektov v proizvolnykh spektralnykh intervalakh] // Kompyuternaya optika, 2016, Vol. 40, # 6, pp. 871–877.
10. Chang, I.C. Noncollinear acousto-optic tuneable filters with large angular aperture // Applied Physics Letters, 1974, Vol. 25, pp. 370–372.
11. Gass, P.A., Sambles, J.R. Accurate design of a noncollinear acousto-optic tuneable filter // Optics Letters, 1991, Vol. 16, # 6, pp. 429–431.
12. Voloshinov, V., Yukhnevich, T. Two regimes of wide-angle acousto-optic interaction in tellurium dioxide single crystals // Applied optics, 2013, Vol. 52, # 24, pp. 5912–5919.
13. Machikhin, A., Gorevoy, A., Pozhar, V., Batshev, V. Modes of wide-aperture acousto-optic diffraction in a uniaxial birefringent crystal // J. Opt., 2021, Vol. 23, # 125607, pp. 1–9.
14. Epikhin, V.M., Visen, F.L. Widening of the Spectral Range of the Non-collinear Acousto-optic Filter [Rasshireniye spektralnogo diapazona nekollinearnogo akustoopticheskogo filtra] // ZhTF, 1990, Vol. 60, # 9, pp. 169–173.
15. Machikhin, A., Batshev, V., Pozhar, V., Naumov, A. Single-volume dual-channel acousto-optic tuneable filter // Optics Express, 2020, Vol. 28, # 2, pp. 1150–1157.
16. Epikhin, V.M., Visen, F.L., Paltsev, L.L. Acousto-optic Filtration of Radiation with Arbitrary Polarisation [Akustoopticheskaya filtratsiya izlucheniya s proizvolnoy polyarizatsiey] // ZhTF, 1987, Vol. 57, # 10, pp. 1910–1914.
17. Voloshinov, V.B., Molchanov, V. Ya., Babkina, T.M. Acousto-optic Filter of Non-polarised Electromagnetic Radiation [Akustoopticheskiy filtr nepolyarizovannogo elektromagnitnogo izlucheniya] // ZhTF, 2000, Vol. 70, # 9, pp. 93–98.
18. Machikhin, A.S., Pozhar, V.E. Obtaining Spectral Stereo Images with Electronic Spectral Tuning and Polarisation Separation [Polucheniye spektralnykh stereoizobrazheniy s elektronnoy perestroykoy po spektru i s polyarizatsionnym razdeleniyem] // ZhTF Letters, 2014, Vol. 40, # 18, pp. 58–65.
19. Machikhin, A., Batshev, V., Pozhar, V., Naumov, A., Gorevoy, A. Acousto-optic tuneable spectral filtration of stereoscopic images // Optics Letters, 2018, Vol. 43, # 5, pp. 1087–1090.
20. Gorevoy, A., Machikhin, A., Martynov, G., Pozhar, V. Computational technique for field-of-view expansion in AOTF-based imagers // Optics Letters, 2022, Vol. 47, # 3, pp. 585–588.

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• tuneable acousto-optic filter
• spectral spectroscopy
• spatial-resolution spectroscopy
• polarisation sensitivity
• two-channel acousto-optic filters
• multifunctional devices