Ultrasonic imaging using trapped energy mode Fresnel lens transducersTrapped-energy focusing transducers operating in the 2-5 MHz range have been fabricated by plating concentric rings of electrodes on a piezoelectric plate. The concentric ring structure acts as a Fresnel lens and can be used to obtain excellent lateral focusing of ultrasonic waves. The trapping is sufficiently strong to permit optimization of electrode spacings to suppress spurious virtual foci and ring sidelobes.
Document ID
19810041775
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Das, P. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Talley, S. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Kraft, R. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Tiersten, H. F. (Rensselaer Polytechnic Inst. Troy, NY, United States)
Mcdonald, J. F. (Rensselaer Polytechnic Institute, Troy, N.Y., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: International Symposium on Acoustical imaging. Visualization and characterization