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High-speed imaging of the sound field by parallel phase-shifting digital holography

机译：平行相移数字全息术声场的高速成像

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摘要

Sound field imaging techniques have been found very useful for acoustic designs. Building on this idea, innovative techniques are needed and presented in this paper, where we report on developed imaging of the sound field radiated from speakers by parallel phase-shifting digital holography. We adopted an ultrasonic wave radiated from a speaker for an object. The phase distribution of the light wave was modulated by the sound field radiated from the speaker. The modulated phase distribution was recorded in the form of multiplexed phase-shifted holograms at the frame rate of 100,000 fps. A 40,000 Hz sound field radiated from a speaker is used as an observation target. Our proposed method can implement the imaging of the sound field successfully. Also, in order to demonstrate the digital refocusing capability of digital holography, we set two speakers, whose difference in depth positions was 6.6 cm, as a long-depth object. We demonstrated the digital refocusing on the two speakers along with the capability of measuring the positions of the objects. Furthermore, we succeeded in imaging of 40,000 Hz and 41,000 Hz sound fields radiated from the two speakers. The presented experimental results showed that parallel phase-shifting digital holography is wry useful and suitable for sound field imaging. (C) 2020 Optical Society of America
机译：声场成像技术已被发现对声学设计非常有用。基于这个想法，我们需要创新的技术，并在本文中介绍，在这里，我们报告了通过并行相移数字全息技术对扬声器辐射的声场进行成像的进展。我们采用扬声器发射的超声波作为目标。光波的相位分布由扬声器辐射的声场调制。调制相位分布以复用相移全息图的形式记录，帧速率为100000 fps。从扬声器辐射的40000赫兹声场被用作观察目标。我们提出的方法可以成功地实现声场的成像。此外，为了展示数字全息的数字再聚焦能力，我们将两个深度位置差为6.6厘米的扬声器设置为一个长深度物体。我们演示了数字重新聚焦在两个扬声器上，以及测量物体位置的能力。此外，我们成功地对两个扬声器辐射的40000 Hz和41000 Hz声场进行了成像。实验结果表明，并行相移数字全息术是一种非常有用的方法，适用于声场成像。（C） 2020美国光学学会

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  • 来源
    《Applied optics》 |2021年第4期|共9页
  • 作者

    Takase Yuki; Shimizu Kazuki; Mochida Shogo; Inoue Tomoyoshi; Nishio Kenzo; Rajput Sudheesh K.; Matoba Osamu; Xia Peng; Awatsuji Yasuhiro;

  • 作者单位

    Kyoto Inst Technol Sakyo Ku Matsugasaki Goshokaiao Cho Kyoto 6068585 Japan;

    Kyoto Inst Technol Sakyo Ku Matsugasaki Goshokaiao Cho Kyoto 6068585 Japan;

    Kyoto Inst Technol Sakyo Ku Matsugasaki Goshokaiao Cho Kyoto 6068585 Japan;

    Kyoto Inst Technol Sakyo Ku Matsugasaki Goshokaiao Cho Kyoto 6068585 Japan;

    Kyoto Inst Technol Sakyo Ku Matsugasaki Goshokaiao Cho Kyoto 6068585 Japan;

    Kobe Univ Nada Ku Rokkodai 1-1 Kobe Hyogo 6588501 Japan;

    Kobe Univ Nada Ku Rokkodai 1-1 Kobe Hyogo 6588501 Japan;

    Natl Inst Adv Ind Sci &

    Technol Cent 2 1-1-1 Umezono Tsukuba Ibaraki 3058568 Japan;

    Kyoto Inst Technol Sakyo Ku Matsugasaki Goshokaiao Cho Kyoto 6068585 Japan;

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