光ヘテロダイン法によるパルス超音波の粒子変位測定

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概要

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• An optical heterodyne method is described for studying the particle displacement of the pulsed acoustic wave in the megahertz frequency range. The acoustic wave falls on a thin plastic film and its motion is measured with the optical heterodyne technique, which allows to resolve local acoustic beam profiles and provides a means to measure the absolute displacement. The acoustic fields from a 2. 25MHz flat transducer and a 5MHz focused one are investigated quantitatively. The measured beam patterns agree well with the theoretical ones. The absolute value of the displacement is also discussed. This method is proposed as a calibration procedure for the parameters related to the acoustic fields.

• 社団法人日本音響学会の論文

著者

• 永井 聰

  National Research Laboratory Of Metrology

• 飯塚 幸三

  National Research Laboratory of Metrology

関連論文

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• 光ヘテロダイン法によるパルス超音波の粒子変位測定

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