An Acoustooptic Spatial-Frequency Filter of Two-Color Radiation Operating in the First Diffraction Order

The characteristics of an acoustooptic (AO) Bragg cell of two-color radiation as a differential spatial-frequency filter, in which the first diffraction order is the working one, have been investigated. It is shown that in a general case, it is impossible to provide two-dimensional image differentia...

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Bibliographic Details
Published in:Instruments and experimental techniques (New York) 2021-07, Vol.64 (4), p.549-553
Main Authors: Kotov, V. M., Voronko, A. I.
Format: Article
Language:English
Subjects:
Acoustic frequencies
Acousto-optics
Bragg cells
Color
Differentiation
Diffraction
Electrical Engineering
Frequency filters
General Experimental Technique
Measurement Science and Instrumentation
Physical Chemistry
Physics
Physics and Astronomy
Radiation
Sound
Tellurium dioxide
Wavelengths
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Summary:The characteristics of an acoustooptic (AO) Bragg cell of two-color radiation as a differential spatial-frequency filter, in which the first diffraction order is the working one, have been investigated. It is shown that in a general case, it is impossible to provide two-dimensional image differentiation simultaneously at two wavelengths. A regime has been found that allows one to change from one wavelength to another with preservation of the two-dimensional differentiation operation by adjusting the sound power. This variant has been confirmed experimentally by the formation of a two-dimensional contour using two-color radiation of an Ar laser at wavelengths of 0.488 × 10 –4 and 0.514 × 10 –4 cm, as well as a TeO 2 AO cell that operates at a sound frequency of 51 MHz.
ISSN:0020-4412
1608-3180
DOI:10.1134/S0020441221040205