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

作者：Donati Silvano^*; Martini Giuseppe; Hwang Sheng Kwang

来源：Optical Engineering, 2018, 57(5): 051508.

DOI：10.1117/1.OE.57.5.051508

• photonics
• laser diodes
• optical feedback
• interferometry
• vibrations
• measurements

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.

• 出版日期2018-5