DEVICE FOR LASER-ACOUSTIC CONTROL OF SOLID AND LIQUID MEDIA Russian patent published in 2020 - IPC G01N29/07 G01H9/00 

FIELD: non-destructive inspection.

SUBSTANCE: invention can be used for investigation of inhomogeneities of solid and liquid media. Device comprises a pulsed laser connected through an optical fiber with an optical-acoustic transducer, as well as a piezo-receiver connected through an amplifier to an analogue-to-digital converter connected to a computer. Optical-acoustic converter is made in form of sealed cylindrical housing with transparent contact liquid and base, made in the form of a film optical-acoustic generator when controlling media absorbing optical radiation, or in form of an optically transparent film when controlling media with weak absorption of optical radiation. Piezo-receiver and connection with optical fiber for input of laser radiation is located in opposite base of housing. Proposed invention widens the possibility of using the laser-acoustic method of monitoring solid and liquid media by eliminating the need to provide a flat surface of the analyzed material, high accuracy and reliability of monitoring by reducing the effect of quality of acoustic contacts and natural oscillations of components of the device on recorded acoustic signals, as well as reducing their dissipation when passing through the components of the device.

EFFECT: disclosed is a device for laser-acoustic control of solid and liquid media.

1 cl, 5 dwg