We succeeded in high-speed imaging of gas flow by means of parallel phase-shifting digital holography. This technique is capable of capturing three-dimensional (3-D) information of object and carrying out phase-shifting interferometry with a single-shot exposure because the interference fringe images in which the information of multiple phase-shifted holograms is spatially multiplexed are simultaneously recorded. We constructed a high-speed phase-shifting digital holography system by employing a quarter-wave plate and a high-speed camera. The image sensor of the camera has an anisotropic polarization-detecting function pixel by pixel. Each pixel of the polarization-detecting function corresponds to each pixel of the image sensor. The phase retardation of the reference wave is determined by the direction of the polarization axis of the each pixel. A compressed gas flow sprayed from a nozzle was set as an object. We attained the reconstructed images of phase variation caused by the gas flow. We also succeeded in phase imaging at the rate of 180,000 frames per second when the number of pixels of the captured image was 128 × 128. Additionally, we also obtained temporal subtraction images of the reconstructed images. The achieved frame rate was the fastest among not only phase-shifting digital holography but also digital holography and phase-shifting interferometry which have been ever reported, for our knowledge. It is expected that parallel phase-shifting digital holography and the constructed system can contribute to 3-D moving picture measurement of dynamically moving objects such as particle flows, shock waves, mechanical vibration, and so on.
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ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4441-0
PROCEEDINGS PAPER
High-Speed Imaging of Gas Flow by Parallel Phase-Shifting Digital Holography
Takashi Kakue,
Takashi Kakue
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
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Tatsuki Tahara,
Tatsuki Tahara
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
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Yuki Shimozato,
Yuki Shimozato
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
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Kenichi Ito,
Kenichi Ito
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
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Yasuhiro Awatsuji,
Yasuhiro Awatsuji
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
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Kenzo Nishio,
Kenzo Nishio
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
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Shogo Ura,
Shogo Ura
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
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Toshihiro Kubota,
Toshihiro Kubota
Kubota Holography Laboratory Corporation, Uji, Kyoto, Japan
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Osamu Matoba
Osamu Matoba
Kobe University, Kobe, Hyogo, Japan
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Takashi Kakue
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Tatsuki Tahara
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Yuki Shimozato
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Kenichi Ito
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Yasuhiro Awatsuji
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Kenzo Nishio
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Shogo Ura
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Toshihiro Kubota
Kubota Holography Laboratory Corporation, Uji, Kyoto, Japan
Osamu Matoba
Kobe University, Kobe, Hyogo, Japan
Paper No:
AJK2011-31012, pp. 83-88; 6 pages
Published Online:
May 25, 2012
Citation
Kakue, T, Tahara, T, Shimozato, Y, Ito, K, Awatsuji, Y, Nishio, K, Ura, S, Kubota, T, & Matoba, O. "High-Speed Imaging of Gas Flow by Parallel Phase-Shifting Digital Holography." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 2, Fora. Hamamatsu, Japan. July 24–29, 2011. pp. 83-88. ASME. https://doi.org/10.1115/AJK2011-31012
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