Polymeric piezoelectric microprobe having a damper

Details Polymeric piezoelectric microprobe having a damper Polymeric piezoelectric microprobe having a damper

H - Electricity

04

R

349/36, 349/65

H04R 17/00 (2006.01) A61B 8/08 (2006.01) B06B 1/06 (2006.01) H01L 41/113 (2006.01)

Patent

CA 1134939

PIEZOELECTRIC MICROPROBE Abstract of the Disclosure A probe detects sonic energy in liquids and in mater- ials containing liquids such as the flesh of living beings, the probe being particularly adapted for medical ultrasonics. The probe is constructed of materials having acoustic imped- ances substantially equal to that of water to maximize the transfer of sonic energy in a living being to an electric signal within the probe for accurate detection of high fre- quency pulses having a duration less than a microsecond. A piezoelectric polymer serves as the transducer and is mounted at the end of the probe housing between a thin metallic window which serves as one electrode, and a metallized rubber rod which serves as the second electrode and sonically insulates the transducer from the housing. An acoustically absorbent ring affixed to the perimeter of the face of the probe, and a flaring of the back end of the probe, reduce the diffraction and reflection of acoustic waves for improved accuracy in the measurement of submicrosecond pulses.

361678

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