12 October 2016 Dual-differential laser Doppler angular vibrometer using a ring laser
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A laser Doppler angular vibrometer using a He–Ne dual-frequency ring laser (DF-RL) is demonstrated. By detecting the interference signal of two beams which are diffracted by the surface of two gratings, the displacement of angular vibration can be measured. To our knowledge, this is the first time that a DF-RL has been utilized as the source of a Doppler angular vibrometer. It shows in theory and experiment that this dual-differential laser Doppler angular vibrometer possesses a high precision and can suppress the error in horizontal vibration at the same time, which can be applied to high-frequency microangular vibration measurement.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xin Zhang, Xin Zhang, Guangfeng Lu, Guangfeng Lu, Zhenfang Fan, Zhenfang Fan, Hui Luo, Hui Luo, } "Dual-differential laser Doppler angular vibrometer using a ring laser," Optical Engineering 55(10), 106107 (12 October 2016). https://doi.org/10.1117/1.OE.55.10.106107 . Submission:

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