AMS TechnologiesVibrations firmly in view
To date, MEMS or piezo sensors and microphones have been used to record vibrations - from machine parts, for example. Another approach is an optical sensor based on a self-mixing laser diode.
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<p>Functional principle of a 'Self-Mixing Laser Diode' (SMLD): In this process, an interferometer is realized on the basis of a laser diode, which measures the speed and distance of a target point relative to the laser diode. The technology is based on interference between the light reflected from the target and the light within the laser cavity.</p> © AMS Technologies