FIELD: physics.
SUBSTANCE: hot surface of a body is scanned from the front and the back in the direction of movement. Radiation flux with radially symmetrical spectral distribution is formed on each surface. Spectral components of radiation flux picked up from the front and the back is focused along its optical axis. The radiation is spectrally decomposed and the spectral energy distribution in the spatial distribution radiation spectrum of the front and rear surfaces of the body is analysed. The current temperature in real space-time coordinates of the moving body is determined from the spectrum and its moving away from or approaching focused receivers.
EFFECT: high reliability and efficiency of thermal monitoring moving bodies in foundry and metallurgy.
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