Title :
A synthetic aperture imaging system using surface wave modes
Author :
Bozkurt, A. ; Arikan, O. ; Atalar, A.
Author_Institution :
Dept. of Electr. & Electron. Eng., Bilkent Univ., Ankara, Turkey
Abstract :
A synthetic aperture acoustic imaging system with a novel inversion algorithm is described. Data is obtained by using a transducer insonifying the sample surface at a critical angle which is excited by a short electrical pulse. The critical angle is chosen for a suitable surface wave or Lamb wave mode that exists on the object. The transducer is mechanically scanned in only one direction during which many pulse excitations and subsequent recordings are realized. The received signal is sampled in time and digitized to be processed by using the new inversion approach providing an optimal 2-D image of the surface reflectivity
Keywords :
acoustic signal detection; data acquisition; signal resolution; signal sampling; surface acoustic wave signal processing; ultrasonic imaging; ultrasonic reflection; ultrasonic transducers; Lamb wave mode; acoustic imaging system; critical angle; inversion algorithm; inversion approach; optimal 2-D image; pulse excitations; received signal; sample surface; short electrical pulse; surface reflectivity; surface wave; surface wave modes; synthetic aperture imaging system; transducer; Acoustic imaging; Acoustic pulses; Acoustic transducers; Data acquisition; Geometry; Solid modeling; Surface acoustic waves; Surface waves; Time measurement; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495682
