Fabrication of Weighted Conical Transducer for Generation of Quasi-Nondiffracting Beam
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概要
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The use of conical transducers with weighted velocity distribution has been proposed by the authors as a simple and practical approach for generating Bessel-type quasi-nondiffracting beams. In this paper we present the fabrication of a weighted conical transducer employing a dielectric layer of varying thickness. The dielectric layer is used for applying a radially diminishing voltage to the piezoelectric material, which will create the desired weighting on the vibration amplitude. It is shown from the experiments that the weighted conical transducer has the capability of generating a narrow-beam ultrasound over a long range along the central axis.
- 社団法人応用物理学会の論文
- 1994-05-30
著者
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YAMADA Ken
Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku Unive
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Nakamura Kiyoshi
Department Of Electircal Communications Faculty Of Engineering Tohoku University
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TASEI Katsumi
Department of Electrical Communications, Faculty of Engineering, Tohoku University
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Tasei Katsumi
Department Of Electrical Communications Faculty Of Engineering Tohoku University
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Nakamura Kiyoshi
Department Of Chemistry Faculty Of Science Shinshu University
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Yamada Ken
Department Of Applied Chemistry Faculty Of Science And Technology Keio University
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NAKAMURA Kiyoshi
Department of Biology, Faculty of Science, Okayama University
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