Speckle and speckle-interferometric methods in cardiodiagnostics

摘要

The application of laser speckle and speckle-interferometric methods to cardiovibrations measurements is presented. The homodyne and heterodyne measuring techniques that use the Michelson interferometer are compared. As shown, the space-time projections of the interferometer output signal can be useful for analysis of biovibrations. New diffraction methods based on speckle dynamics with a small number of scatterers are suggested that allow pulse waves to be sensed and recorded without distortion.