Methods and models of systems for remote measurement and recording of vibrations with amplitude less than 10 nanometers are investigated on the basis of coherent laser sources. The mathematical model of the Doppler effect is analyzed. The basic characteristics of perspective measurement systems are determined. The modern tendencies of development of the direction of laser Doppler vibrometers and the scope of their application are revealed, as well as the expediency of further researches is substantiated. Observations of vibrations of various objects, their registration and analysis in the natural and applied sciences are one of the main methods on which the study of natural objects and phenomena, diagnostics in medicine and technology, the solution of special problems in military and law enforcement activities, ensuring information security at the objects of information activity, etc. In many cases, due to the specificity of the investigated objects, direct access to them is not possible or approaching the measurement object is unsafe for the researcher. The above determines the relevance of research into the problems and principles of building reliable information technologies fo
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