Arc scan transducer array having a diverging lens
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United States of America Patent
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-
Apr 3, 1984
Grant Date -
N/A
app pub date -
Jun 26, 1981
filing date -
Jun 27, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic transducer array for arc scan imaging systems comprises a plurality of elongated piezoelectric transducers arranged successively to define a convexed energy radiating surface. A plano-concave acoustic diverging lens is attached to the convexed surface to diverge the acoustic energy transmitted from the transducers in an increased steering angle. The transducers are assembled on an impedance matching layer which defines the convexed radiating surface. The acoustic impedance of the diverging lens is substantially equal to the acoustic impedance of the human body, while the acoustic impedance of the impedance matching layer is greater than that of the human body.
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