This paper aims to inform those interested in the scientific work of a large group of scientists: workers of the
Department of Electronics and Optical communications of St. Petersburg State University of Aerospace
Instrumentation in collaboration with workers of the Department of Quantum Electronics of St. Petersburg State
Technical University in the area of researches and development of acousto-optic tunable filters (AOTF).
Paper discusses the important features of the AOTF structure and their parameters that affect its work, such as:
spectral range of optical radiation, spectral resolution, active aperture of the optical radiation, optical transmission
of the working spectral range, optical radiation polarization (linear, circular or arbitrary) , diffraction efficiency,
contrast, distortion of the optical radiation’s front, frequency range of elastic waves, switching time, maximum
electric control power, impedance.
Also the AOTF using is considered: AOTF’s implications for control of laser radiation, AOTF’s application to
determine the counterfeit money. The last part of the report focuses on materials that act as antireflection thin
Spectral characteristics of "clean" and enlightened substrates of ZnSe and Ge are shown. As seen from the
examples in the report, antireflection thin films increase transmittance of optical elements.