Compound focus ultrasonic transducer

Details Compound focus ultrasonic transducer Compound focus ultrasonic transducer

1986-04-03

1987-04-21

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310327, 310369, H01L 4108

Patent

active

046599568

ABSTRACT:
Improved focussing and increased bandwidth is obtained in a single-element ultrasonic transducer for non-destructive evaluation and material characterization applications. The piezoelectric ceramic element has a radius of curvature R.sub.1, and a combination lens and cover layer on its front surface has a radius of curvature R.sub.2 which is less than R.sub.1. The depth of field of the transducer is increased and the bandwidth improved; the total thickness of the lens may be selected to control bandwidth.

REFERENCES:
patent: 4001766 (1977-01-01), Hurwitz
patent: 4016751 (1977-04-01), Kossoff
patent: 4184094 (1980-01-01), Kopel
patent: 4382201 (1983-05-01), Trzaskos
patent: 4440025 (1984-04-01), Hayakawa et al.
patent: 4445380 (1984-05-01), Kaminski
patent: 4535630 (1985-08-01), Samodovitz

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