Ultrasonic probes

Details Ultrasonic probes Ultrasonic probes

1986-09-04

1988-04-12

Myracle, Jerry W.

Measuring and testing

Vibration

Sensing apparatus

G01N 2900

Patent

active

047366311

ABSTRACT:
Disclosed is an ultrasonic probe which is capable of externally and selectively controlling the conversion efficiency of an electroacoustic conversion portion. For the electroacoustic conversion portion is used a material which does not exhibit or exhibit the piezoelectricity depending on the absence or the presence of bias electric field, for example, a certain kind of ferroelectric material which is maintained at a temperature in the vicinity of the phase transition temperature thereof or a material having high electrostrictive effect. The electroacoustic conversion efficiency is controlled by applying bias electric field to such a material.

REFERENCES:
patent: 3979711 (1976-09-01), Maginness et al.
patent: 4112411 (1978-09-01), Alais et al.
patent: 4448075 (1984-05-01), Takemura et al.

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