Front surface matched piezoelectric ultrasonic transducer array

Details Front surface matched piezoelectric ultrasonic transducer array Front surface matched piezoelectric ultrasonic transducer array

1978-11-08

1980-07-08

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310326, 310334, 128660, 73644, 367152, H01L 4110

Patent

active

042119480

ABSTRACT:
An ultrasonic transducer array with high sensitivity, for use in water tanks and with human subjects in steered beam imagers to make wide angle sector scans, has narrow transducer elements and one or more quarter-wavelength impedance matching layers on the front surface of each element. The matching layers as well as the piezoelectric ceramic are completely cut thorugh and guide acoustic energy incident at any angle to the ceramic. A continuous covering or wear plate is attached to the matching layers and a continuous damping material can cover the backs of the elements.

REFERENCES:
patent: 2527217 (1950-10-01), Hayes
patent: 2844809 (1958-07-01), Batchelder
patent: 3277451 (1966-10-01), Parssinen
patent: 3657181 (1972-04-01), Riedesel et al.
patent: 3964014 (1976-06-01), Tehon
patent: 4016530 (1977-04-01), Goll
patent: 4101795 (1978-07-01), Fukumoto et al.
patent: 4122725 (1978-10-01), Thompson

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