2002年5月
Visualization and measurements of sound pressure distribution of ultrasonic wave by stroboscopic real-time holographic interferometry
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
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- ,
- ,
- 巻
- 41
- 号
- 5B
- 開始ページ
- 3316
- 終了ページ
- 3324
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1143/JJAP.41.3316
- 出版者・発行元
- INST PURE APPLIED PHYSICS
The sound pressure distribution of underwater ultrasonic waves is measured by real-time stroboscope holographic interferometry using bismuth silicon oxide single crystal. Stroboscopic sub-microsecond irradiation of laser light enables the recording of the stationary holographic interferogram of refractive index changes of water by ultrasonic waves for the frame time of a charge coupled device camera. The fringe order distribution is calculated from the interferogram. by Fourier transform fringe analysis. The optical path differences caused by sound field along the optical path are converted into local field values of sound pressure, which is displayed as a gray scale distribution image. In the experiment, the sound pressure distributions of ultrasonic waves through rectangular and circular apertures are observed. They are compared with the theoretical sound pressure distribution. The sound pressure values obtained by a hydrophone show good agreement with the measured values obtained by this method. The converging and diverging sound pressure fields realized by an acoustic lens are measured.
- リンク情報
- ID情報
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- DOI : 10.1143/JJAP.41.3316
- ISSN : 0021-4922
- Web of Science ID : WOS:000176516000040