2 August 2010 Laser Doppler rotating disk speed imaging using a CMOS image sensor
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Irradiating the HeNe laser on a disc rotating at low speed, the speed of each location on the rotating surface was measured by analyzing images captured by a high speed camera. The Doppler shift, which was generated when the laser light was mixed with the Doppler-shifted light scattering signal generated at each position when the laser light was irradiated on the rotating surface, was acquired by a high-speed camera to store in a memory. After performing FFT for stored measurements of each location, the Doppler-shifted value was converted to the rotational speed. The maximum measurable rotational speed was determined depending on a frame speed of the camera, and the speed distribution of the rotating surface was measured.
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Jong-Woon Choi, Jong-Woon Choi, } "Laser Doppler rotating disk speed imaging using a CMOS image sensor", Proc. SPIE 7791, Interferometry XV: Applications, 77910O (2 August 2010); doi: 10.1117/12.863145; https://doi.org/10.1117/12.863145

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