Arrayed Ultrasonic Transducers on Arc Surface for Plane Wave Synthesis
In ultrasonic computed tomography (UCT), it is necessary to synthesize a plane wave using waves emitted from sound sources arranged in the interior surface of a cylinder. In order to transmit a plane wave into a cylindrical surface, an ultrasonic transducer which has many vibrating elements with pie...
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| Published in: | Japanese Journal of Applied Physics Vol. 43; no. 5S; p. 3061 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
2004
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| Online Access: | Get full text |
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| Summary: | In ultrasonic computed tomography (UCT), it is necessary to synthesize a plane wave using waves emitted from sound sources arranged in the interior surface of a cylinder. In order to transmit a plane wave into a cylindrical surface, an ultrasonic transducer which has many vibrating elements with piezoelectric transverse effect arrayed on an arc surface is proposed. To achieve a wide beam width, the elements should have a small radiation area with a much narrow width. The measured electroacoustic efficiency for the elements was approximately 40% and the beam width defined by -3 dB level from the maximum was as wide as 120 deg. It was confirmed that plane wave synthesis is possible using the proposed transducer array. |
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| ISSN: | 0021-4922 1347-4065 |
| DOI: | 10.1143/JJAP.43.3061 |