Measurement of ambient vibration by self-mixing interferometry and its application to intrusion detection

Silvano Donati; Giuseppe Martini; Sheng-Kwang Hwang

doi:10.1117/1.OE.57.5.051508

17 April 2018 Measurement of ambient vibration by self-mixing interferometry and its application to intrusion detection

Silvano Donati, Giuseppe Martini, Sheng-Kwang Hwang

Author Affiliations +

Optical Engineering, Vol. 57, Issue 5, 051508 (April 2018). https://doi.org/10.1117/1.OE.57.5.051508

Abstract

We present a self-mixing interferometer (SMI) vibrometer developed around a laser diode with a simple and compact analog processing of the fringe signal, and show that this instrument can readily detect ambient vibrations—which adversely affect mechanical material-working lathes. In addition, we find out that the vibrometer is an excellent intrusion detector, capable of discovering a man stepping several meters away from the sensor, thus hinting at an SMI application as an antithief sensor.

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Silvano Donati, Giuseppe Martini, and Sheng-Kwang Hwang "Measurement of ambient vibration by self-mixing interferometry and its application to intrusion detection," Optical Engineering 57(5), 051508 (17 April 2018). https://doi.org/10.1117/1.OE.57.5.051508

Received: 29 October 2017; Accepted: 22 March 2018; Published: 17 April 2018

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