Interferometric imaging of acoustical phenomena using high-speed polarization camera and 4-step parallel phase-shifting technique

K. Ishikawa, K. Yatabe, Y. Ikeda, Y. Oikawa, T. Onuma, H. Niwa, M. Yoshii

研究成果: Conference contribution

10 被引用数 (Scopus)

抄録

Imaging of sound aids the understanding of the acoustical phenomena such as propagation, reflection, and diffraction, which is strongly required for various acoustical applications. The imaging of sound is commonly done by using a microphone array, whereas optical methods have recently been interested due to its contactless nature. The optical measurement of sound utilizes the phase modulation of light caused by sound. Since light propagated through a sound field changes its phase as proportional to the sound pressure, optical phase measurement technique can be used for the sound measurement. Several methods including laser Doppler vibrometry and Schlieren method have been proposed for that purpose. However, the sensitivities of the methods become lower as a frequency of sound decreases. In contrast, since the sensitivities of the phase-shifting technique do not depend on the frequencies of sounds, that technique is suitable for the imaging of sounds in the low-frequency range. The principle of imaging of sound using parallel phase-shifting interferometry was reported by the authors (K. Ishikawa et al., Optics Express, 2016). The measurement system consists of a high-speed polarization camera made by Photron Ltd., and a polarization interferometer. This paper reviews the principle briefly and demonstrates the high-speed imaging of acoustical phenomena. The results suggest that the proposed system can be applied to various industrial problems in acoustical engineering.

本文言語English
ホスト出版物のタイトルSelected Papers from the 31st International Congress on High-Speed Imaging and Photonics
編集者Takeharu Goji Etoh, Hiroyuki Shiraga, Takeharu Goji Etoh
出版社SPIE
ISBN(電子版)9781510611009
DOI
出版ステータスPublished - 2017
イベント31st International Congress on High-Speed Imaging and Photonics - Osaka, Japan
継続期間: 2016 11 62016 11 10

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
10328
ISSN(印刷版)0277-786X
ISSN(電子版)1996-756X

Other

Other31st International Congress on High-Speed Imaging and Photonics
国/地域Japan
CityOsaka
Period16/11/616/11/10

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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