ISOTROPIC BESSEL-HILBERT VISUALIZATION OF PHASE OPTICAL DENSITY FIELDS
Yu. N. Dubnishchev1,2,3, V. A. Arbuzov1,2,3, E. V. Arbuzov1,4,3, O. S. Zolotukhina1,3
1Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Technological Design Institute of Scientific Instrument Engineering, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3Novosibirsk State Technical University, Novosibirsk, Russia
4Sobolev Institute of Mathematics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: optical diagnostics of gaseous and condensed media, Hilbert optics, Bessel beams, optical diagnostics of flames
Abstract
The method and the possibility of realizing isotropic Bessel-Hilbert diagnostics of the phase optical density fields of gaseous, condensed, and reacting media are discussed. The probing field in such systems is formed as a mono- or polychromatic configuration of the Bessel beams. The spatial-frequency Fourier spectrum of the Bessel beams is optically coupled with the concentric phase structure of the isotropic Hilbert filter, and the color structure corresponds to the spectral sensitivity of the photomatrix of a video camera connected to a computer, which analyzes the frame-by-frame sequence of the resulting images. The structure of such a probing field is resistant to diffraction disturbances induced by the medium under study and their influence on the isotropy of the Hilbert visualization of the phase optical density. The area of possible applications is experimental hydro and gas dynamics, thermal physics, oceanology, as well as the corresponding industrial technologies.
|
