TY - JOUR
T1 - Simultaneous imaging of flow and sound using high-speed parallel phase-shifting interferometry
AU - Ishikawa, Kenji
AU - Tanigawa, Risako
AU - Yatabe, Kohei
AU - Oikawa, Yasuhiro
AU - Onuma, Takashi
AU - Niwa, Hayato
N1 - Funding Information:
Japan Society for the Promotion of Science (JSPS); Grant-in-Aid for JSPS Research Fellow (16J06772); JSPS Grant-in-Aid for Research Activity Start-up (17H07191).
Publisher Copyright:
© 2018 Optical Society of America.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - 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.
AB - 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.
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U2 - 10.1364/OL.43.000991
DO - 10.1364/OL.43.000991
M3 - Article
C2 - 29489763
AN - SCOPUS:85042916942
SN - 0146-9592
VL - 43
SP - 991
EP - 994
JO - Optics Letters
JF - Optics Letters
IS - 5
ER -