Proposal of Curvature Control Method for High Intensity Focused Ultrasound Transducer

A method of controlling the focal length of concave ultrasonic transducers using a flexible surface with arrayed piezoelectric elements is proposed. The surface made of a silicon rubber has a different curvature depending on the air pressure of the inner space of the transducer housing. The acoustic...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 52; no. 7; pp. 07HF08 - 07HF08-3
Main Authors Kim, Jungsoon, Kim, Moojoon, Ha, Kanglyeol, Chu, Mincheol
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.07.2013
Subjects
Curvature
Deflection
Housing
Mathematical analysis
Piezoelectricity
Simulation
Transducers
Ultrasound
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Summary:A method of controlling the focal length of concave ultrasonic transducers using a flexible surface with arrayed piezoelectric elements is proposed. The surface made of a silicon rubber has a different curvature depending on the air pressure of the inner space of the transducer housing. The acoustic fields of the transducer were measured and compared with the simulated ones. The ultrasonic field from the transducer converged with a different shape with the deflection of the surface. We confirmed the possibility that the focal point of the transducer could be easily controlled by the method.
Bibliography:ObjectType-Article-1
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ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.52.07HF08