Polymeric piezoelectric microprobe with damper

Details Polymeric piezoelectric microprobe with damper Polymeric piezoelectric microprobe with damper

1979-12-03

1982-02-16

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310334, 310800, H01L 4108

Patent

active

043161154

ABSTRACT:
A probe detects sonic energy in liquids and in materials 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 impedances 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 frequency 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.

REFERENCES:
patent: 3553501 (1971-01-01), Thill
patent: 3794866 (1974-02-01), McElroy et al.
patent: 3798473 (1974-03-01), Murayama
patent: 3832580 (1974-08-01), Yamamuro et al.
patent: 3855847 (1974-12-01), Leschek
patent: 3921442 (1975-11-01), Soloway
patent: 3925692 (1975-12-01), Leschek et al.

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