SCANNING ACOUSTIC MICROSCOPE Russian patent published in 2021 - IPC G01N29/06 

FIELD: instrument engineering.

SUBSTANCE: invention is intended for non-contact ultrasonic inspection of products. The essence of the invention consists in the fact that a scanning acoustic microscope contains an acoustic transducer located at the end of a sound line with an acoustic plane-concave spherical lens located at the other end of the sound line, a mesoscale sound-conducting particle with a characteristic size of no more than the transverse size of the focusing area and no less than λ/2, where λ is the wavelength of the radiation used in the medium, at the speed of sound in the particle material relative to the speed of sound in the environment, lying in the range from 0.5 to 0.83 of the flat-concave spherical lens placed in the focus area, a receiving acoustic converter, an immersion medium, as well as systems for scanning the object under study and restoring its image on a video monitoring device. The above-mentioned mesoscale sound-conducting particle located directly at the end of the sound pipeline is made in the form of a ball with a diameter d of at least 10λ, where λ is the wavelength of the radiation used in the medium, and on its shadow surface along the optical axis there is a second spherical mesoscale particle with a diameter in the range approximately equal to 0.3 d to 0.45 d, and forming an acoustic jet.

EFFECT: improvement of the resolution of acoustic systems for constructing images of the studied objects.

6 cl, 2 dwg