发明名称 |
Miniature, high efficiency dual frequency ultrasonic transducer with selectable beamwidth and apparatus |
摘要 |
Ultrasonic transducer with a selectable beamwidth comprising a body of piezoelectric material in the form of an annulus 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 frequencies with the low frequency 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.
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申请公布号 |
US5581144(A) |
申请公布日期 |
1996.12.03 |
申请号 |
US19950447993 |
申请日期 |
1995.05.23 |
申请人 |
CARDIOMETRICS, INC. |
发明人 |
CORL, PAUL D.;PAO, MICHAEL C.;BARLETTA, VINCENT A.;CHECHELSKI, VICTOR |
分类号 |
G01N29/24;A61B8/00;A61B8/06;A61B8/12;B06B1/06;G01S7/521;H01L41/09;H04R17/00;(IPC1-7):H01K41/08 |
主分类号 |
G01N29/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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