H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 17/00 (2006.01) B06B 1/06 (2006.01) A61B 8/06 (2006.01) A61B 8/12 (2006.01)
Patent
CA 2180559
Ultrasonic transducer with a selectable beamwidth comprising a body of piezoelectric material in the form of an annulus (21) having an outer diameter D and a thickness T. The body has proximal and distal generally planar parallel surfaces and a centrally disposed hole extending therethrough. The body has a cylindrical wall with a width W extending from the hole to the outer diameter. The transducer is capable of operating at low and high resonance being determined by the diameter D and an aspect ratio of D/T and the high frequency resonance being determined by the thickness T and an aspect ratio of W/T.
Transducteur d'ultrasons à largeur de bande sélectionnable comprenant un corps d'un matériau piézo-électrique annulaire (21) de diamètre extérieur D et d'épaisseur T. Le corps présente des surfaces planes distales et proximales sensiblement parallèles et un trou central les traversant. Le corps présente une paroi cylindrique dont la largeur W s'étend du trou au diamètre extérieur. Le transducteur peut fonctionner en résonance basse ou haute selon le diamètre D et le rapport D/T, la haute fréquence étant déterminée par l'épaisseur T et le rapport W/T.
Barletta Vincent A.
Chechelski Victor
Corl Paul Douglas
Pao Michael C.
Cardiometrics Inc.
Smart & Biggar
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