LASER OPTICAL-ACOUSTIC DIAGNOSTICS OF HETEROGENEOUS CONDENCED MEDIA

The investigation of the laser radiation absorption in homogeneous and heterogeneous light absorbing and scattering media is the aim of the paper as well as the investigation of particular features of the ultrasound damping in relaxing and scattering media for the study of the condensed media structure. As a result in has been shown, that the form of a wide-band pulse of shift acoustic waves at the transformation of a longitudinal wave pulse on the "liquid - solid body" separation boundary depends on an angle of the longitudinal wave fall. The heterogeneity of the light absorption in magnetic liquids has been detected. It has been shown, that the degree of microplastic modifications of the composite structure may be estimated on the transformation of a resonance reak of the ultrasonic damping. The methodology for the wide-band acoustic spectroscopy of shift waves has been suggested. The paper results may find their field of application in the diagnostics of light absorbing heterogeneities in natural objects, in the control of laser technological processes, in the non-destrurbing control of the material structureAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio