Ultrasonic transducer with magnetostrictive lens for dynamically focussing and steering a beam of ultrasound energy
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United States of America Patent
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Oct 17, 1995
Grant Date -
N/A
app pub date -
Dec 8, 1993
filing date -
Dec 8, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic transducer with a magnetostrictive lens for dynamically focussing and steering a beam of ultrasound energy is provided. The magnetostrictive lens is operable in response to a magnetic field generated by a coil such that the speed of propagation of the ultrasound beam is selectively controlled as the beam passes through the lens. The lens can be made up of first and second prisms wherein at least one of such prisms is magnetostrictive. Alternatively, the lens can be made up of an individual stage made of a composite having a plurality of elongated rods of magnetostrictive material cooperating in response to the control signal applied to the lens for selectively controlling the propagation speed of the ultrasound beam passing therethrough.
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