FIELD: measuring engineering.
SUBSTANCE: method comprises exposing the object to laser radiation, directing it back to the laser resonator, recording autodyne signal by the external photodetector from the change of the laser irradiation power, and dispersing the signal recorded into the spectral components. Before recording, the object or/and the laser undergo vibration with a given frequency and amplitude greater than half wavelength of the laser radiation. After decomposing the signal recorded into components, a sample of signal record which is no less than the value of the inverse frequency, is extracted. The phase of the autodyne signal is calculated from the set of the spectral components. The procedure is repeated for the next signal sample. The time dependence of the phase of the autodyne signal obtained is used for the calculation of the object velocity.
EFFECT: widened range of the velocities measured and enhanced accuracy of measurements.
7 dwg
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