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Laser vibrometry
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Non-contact measurement of displacement and / or speed of a point of an object subjected to vibration.
Point to measure is illuminated by a laser. The part of the incident light backscattered towards the measuring device is analyzed.
In particular, the Doppler shift of the reflected wave allows to determine the velocity of the point (in the direction of the sensitivity vector).
- Frequency range: 0 to 1.5 MHz
- Maximum measurable shift : some m.
- Maximum speed : ± 10 m / s
- Resolution : 2 nm for displacement and 0.5 microns / s for speed
- Operating distance up to 30 m