Analysis of quality of images obtained by acousto-optic filtering

Dennis V. Bogomolov; Vitaly B. Voloshinov

doi:10.1117/12.612763

3 March 2005 Analysis of quality of images obtained by acousto-optic filtering

Dennis V. Bogomolov, Vitaly B. Voloshinov

Proceedings Volume 5828, Acousto-Optics and Applications V; (2005) https://doi.org/10.1117/12.612763
Event: Acousto-Optics and Applications V, 2004, Gdansk, Poland

Abstract

The paper is devoted to the theoretical and experimental investigation of spatial resolution of images obtained during acousto-optic spectral filtration. The consideration was carried out for a wide angle acousto-optic filter designed on the base of paratellurite single crystal. The crystal was cut in the (1 1 0) plane with the direction of acoustic wave propagation at the angle 10 ° relative to the axis [110]. It was found that optical quality of a filtered image is influenced by a spectral bandwidth of a filter. The spectral bandwidth is determined by a length of piezoelectric transducer that generates ultrasonic waves in an acousto-optic cell. The dependence of a number of resolvable spots on the piezotransducer length was examined theoretically. It was shown that a wavelength of the filtered radiation influences the quality of the processed image. Precise and approximate equations have been derived to determine the spectral passband of the acousto-optic filer, the angular field of view of a single pixel, the angular aperture of the device and the number of resolvable spots in a line. Resolution of the images obtained during the acousto-optic filtration was also measured in the experiment.

Citation Download Citation

Dennis V. Bogomolov and Vitaly B. Voloshinov "Analysis of quality of images obtained by acousto-optic filtering", Proc. SPIE 5828, Acousto-Optics and Applications V, (3 March 2005); https://doi.org/10.1117/12.612763

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