Observation of Ultrasonic Wavefronts by Synchronous Schlieren Imaging

• Azuma Takashi

  Central Research Laboratory, Hitachi Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan

• Tomozawa Akihiro

  Device Center, Hitachi Tobu Semiconductor Ltd., 1-1 Nishiyokote-machi, Takasaki, Gunma 370-0021, Japan

• Umemura Shin-ichiro

  Central Research Laboratory, Hitachi Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan

書誌事項

タイトル別名

• Ultrasonic Electronics. Observation of Ultrasonic Wavefronts by Synchronous Schlieren Imaging.

抄録

A synchronous Schlieren system for observation of ultrasound wavefronts was developed. Since high-intensity and short-response-time GaN/InGaN green light-emitting diodes (LEDs) are suitable light sources of a Schlieren system, we constructed such a system by pulsed illumination synchronized to ultrasound. We used it to observed progressive plane waves and their transmission through a thin plate. Moreover, we used it to observe Lamb waves in the plate by imaging the ultrasonic field in the fluid in its vicinity. The results obtained showed the effectiveness of this system. It has also been proven to be useful for overviewing the spatial distribution of the phase factor of an ultrasonic field, which may be similar to that of ultrasonic power.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 41 (5B), 3308-3312, 2002

  The Japan Society of Applied Physics

キーワード

• optical diffraction tomography
• Schlieren method
• Lamb waves
• acoustic field
• LED

詳細情報

• CRID: 1390282681231078272
• NII論文ID: 110006341375
• NII論文ID: 210000051443
• NII書誌ID: AA10457675
• DOI: 10.1143/jjap.41.3308
• ISSN: 13474065
• ISSN: 00214922
• ISSN: http://id.crossref.org/issn/13474065
• NDL書誌ID: 6180343
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6180343
• Web Site: http://stacks.iop.org/1347-4065/41/i=5S/a=3308/pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可