Simultaneous imaging of flow and sound using high-speed parallel phase-shifting interferometry

In this Letter, simultaneous imaging of flow and sound by using parallel phase-shifting interferometry and a high-speed polarization camera is proposed. The proposed method enables the visualization of flow and sound simultaneously by using the following two factors: (i) injection of the gas, whose...

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Veröffentlicht in:Optics letters 2018-03, Vol.43 (5), p.991-994
Hauptverfasser: Ishikawa, Kenji, Tanigawa, Risako, Yatabe, Kohei, Oikawa, Yasuhiro, Onuma, Takashi, Niwa, Hayato
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container_end_page 994
container_issue 5
container_start_page 991
container_title Optics letters
container_volume 43
creator Ishikawa, Kenji
Tanigawa, Risako
Yatabe, Kohei
Oikawa, Yasuhiro
Onuma, Takashi
Niwa, Hayato
description In this Letter, simultaneous imaging of flow and sound by using parallel phase-shifting interferometry and a high-speed polarization camera is proposed. The proposed method enables the visualization of flow and sound simultaneously by using the following two factors: (i) injection of the gas, whose density is different from the surrounding air, makes the flow visible to interferometry, and (ii) time-directional processing is applied for extracting the small-amplitude sound wave from the high-speed flow video. An experiment with a frame rate of 42,000 frames per second for visualizing the flow and sound emitted from a whistle was conducted. By applying time-directional processing to the obtained video, both flow emitted from the slit of the whistle and a spherical sound wave of 8.7 kHz were successively captured.
doi_str_mv 10.1364/ol.43.000991
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source OSA_美国光学学会数据库1
subjects Frames per second
High speed
Interferometry
Sound waves
Spherical waves
title Simultaneous imaging of flow and sound using high-speed parallel phase-shifting interferometry
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