Patent ID: 6392330
Filing Date: 2002-05-21
Classification: B06B,G01H,Y10S

Abstract:
An ultrasound receiver comprising:(a) a hollow cylinder formed primarily from flexible piezoelectric film, said hollow cylinder having an outer surface, an inner surface, a central axis and a height measured parallel to said central axis; (b) a sensing electrode formed from conductive material applied to said inner surface; (c) a grounded electrode formed from conductive material applied to said outer surface; and (d) a support structure for supporting said hollow cylinder, said support structure being configured to support said hollow cylinder in such a manner as to allow propagation of virbration waves circumferentially around a major part of said hollow cylinder, wherein said sensing electrode is formed as a strip extending in an extensional direction substantially parallel to said central axis along a major part of said height, said strip subtending at said central axis an angle of not more than 90Â°.