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Proceedings Paper

Study of object surface characteristics using an acousto-optic tunable filter
Author(s): Boris Gurevich; Sergey Andreyev; Andrey Belyaev; Vyacheslav Chelak; Japar Ismailov
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Paper Abstract

Acousto-optic tunable filters (AOTF) represent a very strong tool for study the features of different surfaces, especially if these features depend on the spectral dispersion of the light reflection indicatrix form and position. The typical sample of the problem connected with the surface features definition is the problem of recognition of the surface relief which is used for different objects genuineness. The surface relief can represent a sum of a number of diffraction gratings, oriented in different directions and having different spacings. If the studied surface is illuminated by light of variable wavelength, the reflected light varies correspondingly its intensity and direction. The variable wavelength of light can be provided by AOTF whereas spatial and temporal distribution of the reflected light can be registered by 2-D CCD array. The AOTF which is used for the surface study, gas been manufactured using acousto-optic Bragg cell based on tellurium dioxide single crystal. The interaction configuration in the cell corresponds to a non-collinear AOTF. The luminous flux at the AOTF output can be characterized by the controlled central wavelength, controlled spectral selectivity, and controlled form of AOTF spectral characteristic. The data measured by means of CCD array, are compared with the sample data using special software.

Paper Details

Date Published: 29 September 2005
PDF: 6 pages
Proc. SPIE 5953, Acousto-optics and Photoacoustics, 59530W (29 September 2005); doi: 10.1117/12.622710
Show Author Affiliations
Boris Gurevich, Scientific Instruments Co. (Russia)
Sergey Andreyev, Scientific Instruments Co. (Russia)
Andrey Belyaev, Institute for Analytical Instrumentation, RAS (Russia)
Vyacheslav Chelak, Scientific Instruments Co. (Russia)
Japar Ismailov, Institute of Physics (Kyrgyzstan)

Published in SPIE Proceedings Vol. 5953:
Acousto-optics and Photoacoustics
Antoni Sliwinski; Rainer Reibold; Vitaly B. Voloshinov, Editor(s)

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