Multiple field acoustic focusser
First Claim
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1. An ultrasonic apparatus for focussing ultrasonic waves comprising the following acoustical lenses and transducing elements located in order along an axis:
- a first acoustical lens,a first transducing element,a second acoustical lens, anda second transducing element, and further comprisingmeans for coupling the first lens to the first transducing element, the first transducing element to the second lens, and the second lens to the second transducing element so that ultrasonic waves can propagate from the first lens, to the first transducing element, to the second lens, and to the second transducing element.
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Abstract
The invention provides a highly focussed ultrasonic wave throughout a large depth of field without any mechanical motion. One embodiment of the invention providing two focussed fields includes a front to back arrangement of a converging lens, a transducer without any backing material to dissipate ultrasound, a converging lens, and a transducer. To focus in the far field, the front transducer transmits and receives via the front lens. To focus in the near field, the rear transducer transmits and receives via both lenses which collectively focus in the near field.
13 Citations
9 Claims
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1. An ultrasonic apparatus for focussing ultrasonic waves comprising the following acoustical lenses and transducing elements located in order along an axis:
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a first acoustical lens, a first transducing element, a second acoustical lens, and a second transducing element, and further comprising means for coupling the first lens to the first transducing element, the first transducing element to the second lens, and the second lens to the second transducing element so that ultrasonic waves can propagate from the first lens, to the first transducing element, to the second lens, and to the second transducing element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An ultrasonic apparatus for focussing ultrasonic waves comprising the following lenses, transducing elements, and absorbing and dissipating means located in order along an axis:
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a first acoustical lens, a first transducing element, a second acoustical lens, a second transducing element, a third acoustical lens, a third transducing element, and means for absorbing and dissipating ultrasonic waves, and further comprising electrodes attaching to the first, second, and third transducing elements, and means for coupling the first acoustical lens to the first transducing element, the first transducing element to the second acoustical lens, the second acoustical lens to the second transducing element, the second transducing element to the third acoustical lens, and the third acoustical lens to the third transducing element so that ultrasonic waves can propagate from the first acoustical lens, to the first transducing element, to the second acoustical lens, to the second transducing element, to the third acoustical lens, and to the third transducing element.
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Specification
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Current AssigneeArthur Samodovitz
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Original AssigneeArthur Samodovitz
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InventorsSamodovitz, Arthur
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Primary Examiner(s)Birmiel, Howard A.
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Application NumberUS06/222,947Time in Patent Office889 DaysField of Search181/176, 367/150, 367/153, 367/155, 73/642US Class Current73/642CPC Class CodesG10K 11/30 using refraction, e.g. acou...
