PHASE OPTICAL DENSITY FIELDS IN THE GASEOUS AND CONDENSED MEDIA VISUALIZATION METHOD Russian patent published in 2019 - IPC G01P5/26 G01B11/24 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the measuring equipment and can be used in experimental hydro and aerodynamics, thermal physics, in technologies related to the need for the velocities studying, convective structures and phase transitions in the gaseous and condensed media. Claimed method of the phase optical density fields in gaseous and condensed media visualization consists is that into the tested medium a probing light field is directed, forming the Fourier spectrum of induced by the medium under study the light field disturbances, performing the probing optical field disturbances Fourier spectrum the Hilbert filtering, performing the filtered optical field inverse Fourier transform, projecting it on to the video camera photo matrix and analyzing the frame-by-frame images sequence. At that, forming the probing field by the two spatially combined light beams, which wave numbers are in the ratio of 3/4, and correspond to different colors in the photo matrix rgb-sensitivity spectrum, one of which in the probe field spectrum is matched with the subjected to Hilbert filtering light field wavelength.

EFFECT: exclusion of the probing light field amplitude disturbances influence on the medium under study phase optical density fields visualization.

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