Self-mixing Interferometer for Contactless Vibration Measurements
نویسنده
چکیده
Self-mixing interferometer is a suitable tool for implementing industrial sensors, with the advantages of optical techniques, such as high accuracy and contactless operation, but at potential very-low cost. This paper describes some techniques recently developed for realizing vibration measurements, based on different signal elaborations and with different performances and applications. Particular attention is devoted to a novel digitalfeedback vibrometer, realized through a feedback loop on the pump current. Key-Words: Interferometry; Self-mixing; Laser Sensors; Vibration Measurement; Optical Measurement; Semiconductor Laser.
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