Title :
A new focusing ultrasonic transducer and two foci acoustic lens for acoustic microscopy
Author :
Maslov, Konstantin I. ; Dorozhkin, Leonid M. ; Doroshenko, Valery S. ; Maev, Roman G.
Author_Institution :
Inst. of Chem. Phys., Acad. of Sci., Moscow, Russia
fDate :
3/1/1997 12:00:00 AM
Abstract :
The textured piezoelectric film of a new organic-based material produced by vapor deposition was used as an active element of a focusing ultrasonic transducer. The transducer exhibits near theoretical lateral and axial resolution, unipolar pulse response to a step voltage, and 30 dB insertion losses in an octave frequency band. The transducer is acoustically transparent over a wide frequency range and can be fabricated on a concave spherical surface of the standard acoustic lens. The resulting double transducer and two foci acoustic lens are capable of improving the quality of the surface structure imaging or of being used in continuous wave reflection acoustic microscopy.
Keywords :
acoustic microscopy; piezoelectric thin films; piezoelectric transducers; ultrasonic focusing; ultrasonic imaging; ultrasonic transducers; 30 dB; 5 to 120 MHz; acoustic microscopy; acoustic transparency; axial resolution; carbamide class material; concave spherical surface; continuous wave reflection acoustic microscopy; double transducer; focusing ultrasonic transducer; insertion losses; lateral resolution; octave frequency band; organic-based material; surface structure imaging; textured piezoelectric film; transducer fabrication; two foci acoustic lens; unipolar pulse response; vapor deposition; Acoustic transducers; Focusing; Frequency; Lenses; Optical materials; Organic materials; Piezoelectric films; Piezoelectric transducers; Surface acoustic waves; Ultrasonic transducers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
