Simultaneous imaging of flow and sound using high-speed parallel phase-shifting interferometry
Simultaneous imaging of flow and sound using high-speed parallel phase-shifting interferometry
复制标题
DOI：
10.1364/ol.43.000991
复制
发表时间：
2018-03-01
期刊：
影响因子：
3.6
通讯作者：
Niwa, Hayato
中科院分区：
文献类型：
--
作者：
Ishikawa, Kenji;Tanigawa, Risako;Niwa, Hayato
在这封信中，同时成像的流动和声音，通过使用并行相移干涉和高速偏振相机提出。所提出的方法通过使用以下两个因素同时实现流和声音的可视化：（i）注入气体，其密度与周围空气不同，使得流对干涉测量可见，以及（ii）应用时间方向处理从高速流视频中提取小振幅声波。以每秒42，000帧的帧速率进行实验，以可视化从哨子发出的流动和声音。通过对所获得的视频应用时间方向处理，相继捕获了从哨子的狭缝发出的流和8.7kHz的球形声波。(C)2018美国光学学会
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. (C) 2018 Optical Society of America