26 June 2017 Optical sound wave recording by digital holography with heterodyne technique
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Proceedings Volume 10335, Digital Optical Technologies 2017; 103351G (2017) https://doi.org/10.1117/12.2270101
Event: SPIE Digital Optical Technologies, 2017, Munich, Germany
A visualization technique of sound wave propagation using digital holography with heterodyne technique is presented. In the proposed method, the frequency of the interference pattern in an off-axis digital holography is down converted into the detectable frequency in an image sensor operated at the video frame rate by using the heterodyne interferometer. We present the principle of the recording technique and experimental results are described.
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Xiangyu Quan, Sudheesh Rajput, Kouichi Nitta, Osamu Matoba, Yasuhiro Awatsuji, "Optical sound wave recording by digital holography with heterodyne technique", Proc. SPIE 10335, Digital Optical Technologies 2017, 103351G (26 June 2017); doi: 10.1117/12.2270101; https://doi.org/10.1117/12.2270101

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