A synthetic aperture imaging system using surface wave modes
Date
1995
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Source Title
Proceedings of the 1995 IEEE Ultrasonics Symposium
Print ISSN
1051-0117
Electronic ISSN
Publisher
IEEE
Volume
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Pages
779 - 782
Language
English
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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.
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Keywords
Acoustic transducers , Acoustic wave reflection , Algorithms , Computational geometry , Computer simulation , Data acquisition , Data recording , Digital signal processing , Electric excitation , Imaging systems , Surface waves , Synthetic aperture radar , Critical angle , Electrical pulse excitation , Insonifying , Inversion algorithm , Lamb wave , Singular value decomposition , Surface reflectivity , Synthetic aperture acoustic imaging system , Acoustic imaging