ULTRASONIC TRANSDUCERS, BACKING STRUCTURES AND RELATED METHODS

There is provided an ultrasonic transducer having a sample-contacting portion and a back portion, the back portion being opposed to the sample contacting portion. The transducer includes a piezoelectric material configured to be in acoustic communication with a sample and a backing structure in acou...

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Bibliographische Detailangaben
Hauptverfasser:	KALIAN, Varak, RIEDER, Eric, CHAGGARES, Nicholas Chris
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS FOR PERFORMING MECHANICAL WORK IN GENERAL GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY PERFORMING OPERATIONS PHYSICS TARIFF METERING APPARATUS TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	There is provided an ultrasonic transducer having a sample-contacting portion and a back portion, the back portion being opposed to the sample contacting portion. The transducer includes a piezoelectric material configured to be in acoustic communication with a sample and a backing structure in acoustic communication with the piezoelectric material. The backing structure is configured to reflect acoustic energy towards the sample-contacting portion and away from the back portion of the ultrasonic transducer. The backing structure includes a low acoustic impedance layer and a high acoustic impedance layer. The transducer may also include a second dual layer de-matching backing. The second dual layer de-matching backing includes a second low acoustic impedance layer and a second high acoustic impedance layer. There are also provided ultrasonic transducers including a one-dimensional piezoelectric array or a two-dimensional piezoelectric matrix and including backing structure configured to reflect acoustic energy.