Phase imaging of radiated sound field by parallel phase-shifting digital holography

Yuki Takase; Kazuki Shimizu; Syogo Mochida; Tomoyoshi Inoue; Kenzo Nishio; Sudheesh K. Rajput; Osamu Matoba; Toshihiro Kubota; Yasuhiro Awatsuji

doi:10.1117/12.2573291

15 June 2020 Phase imaging of radiated sound field by parallel phase-shifting digital holography

Yuki Takase, Kazuki Shimizu, Syogo Mochida, Tomoyoshi Inoue, Kenzo Nishio, Sudheesh K. Rajput, Osamu Matoba, Toshihiro Kubota, Yasuhiro Awatsuji

Author Affiliations +

Proceedings Volume 11521, Biomedical Imaging and Sensing Conference 2020; 115210Y (2020) https://doi.org/10.1117/12.2573291
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

We report imaging of a sound field radiated from a sound source by parallel phase-shifting digital holography. We used a Nd:YVO₄ laser emitting light with a wavelength of 532 nm as a light source and a polarization imaging camera to record holograms. The holograms were recorded 40000 Hz sound with 100000 frame per second. To adjust one wavelength of sound to the recordable area of the image sensor, we introduced a demagnification optical system in the path of the object beam. The phase difference images were calculated from the recorded holograms. Thus, we observed propagation of periodical phase distributions of sound and succeeded in sound field imaging.

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Yuki Takase, Kazuki Shimizu, Syogo Mochida, Tomoyoshi Inoue, Kenzo Nishio, Sudheesh K. Rajput, Osamu Matoba, Toshihiro Kubota, and Yasuhiro Awatsuji "Phase imaging of radiated sound field by parallel phase-shifting digital holography", Proc. SPIE 11521, Biomedical Imaging and Sensing Conference 2020, 115210Y (15 June 2020); https://doi.org/10.1117/12.2573291

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