Ultrasonic transducer using ultra high frequency

Details Ultrasonic transducer using ultra high frequency Ultrasonic transducer using ultra high frequency

1980-02-12

1982-03-23

Blum, Theodore M.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

310335, H04R 1700

Patent

active

043216960

ABSTRACT:
An ultrasonic transducer comprises an acoustic wave propagation medium, a piezoelectric element mounted on one surface of the propagation medium, and an ultrasonic lens formed in the opposite surface of the propagation medium and having a predetermined focal distance. The ultrasonic radiation generated from the piezoelectric element is propagated through the propagation medium and focused by the lens. The axial length of the propagation medium is selected to be 1/N (N: odd number) of a Fresnel focal distance.

REFERENCES:
patent: 2863075 (1958-12-01), Fry
patent: 3958559 (1976-05-01), Glenn et al.
patent: 3995179 (1976-11-01), Flournoy et al.

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