Laser vibrometers can be used if optical contact can be established with the measuring point and the surface reflects the laser beam sufficiently. Laser vibrometers detect structure-borne noise optically at one point and are therefore independent of ambient noise. The signal is recorded without contact. Laser vibrometers with a high sampling rate are available for precise vibration measurement, which can be used for a high frequency range or speed range.
Laser vibrometers are used, for example, to test rotating parts such as ball bearings or dental drills. Laser vibrometers can also be used if no mechanical contact is possible, e.g. when retrofitting existing test benches.