Frequency and bandwidth controlled ultrasound transducer

Details Frequency and bandwidth controlled ultrasound transducer Frequency and bandwidth controlled ultrasound transducer

1998-06-09

2000-05-02

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310367, H01L 4104

Patent

active

060576324

ABSTRACT:
A wideband ultrasound transducer having a plurality of transducer elements sequentially arranged in an azimuth direction. Each transducer element is spaced from adjacent transducer elements in the azimuth direction and each transducer element extends from a first end to a second end in an elevation direction. Each transducer element has a thickness in a range direction that increases from the first end to the second end wherein each transducer element is thinnest at the first end and thickest at the second end. The spacing of the transducer elements increases from the first end to the second end so that the spacing is at a minimum at the first end and a maximum at the second end. Alternatively, each transducer element has a thickness in a range direction that increases from the first end to the second end and each transducer element has a front surface defined by a concave surface having a concavity dependent on its position along the elevation direction wherein subsegments of an elevation aperture focus at shallower depths at the first end and deeper depths at the second end when the transducer is in use.

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