Ultrasonic Electronics. Observation of Ultrasonic Wavefronts by Synchronous Schlieren Imaging.
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- Azuma Takashi
- Central Research Laboratory, Hitachi Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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- Tomozawa Akihiro
- Device Center, Hitachi Tobu Semiconductor Ltd., 1-1 Nishiyokote-machi, Takasaki, Gunma 370-0021, Japan
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- Umemura Shin-ichiro
- Central Research Laboratory, Hitachi Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
Bibliographic Information
- Other Title
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- Observation of Ultrasonic Wavefronts by Synchronous Schlieren Imaging
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Abstract
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.
Journal
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 41 (5B), 3308-3312, 2002
The Japan Society of Applied Physics
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Details 詳細情報について
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- CRID
- 1390282681231078272
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- NII Article ID
- 110006341375
- 210000051443
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- NII Book ID
- AA10457675
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- ISSN
- 13474065
- 00214922
- http://id.crossref.org/issn/13474065
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- NDL BIB ID
- 6180343
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed