Laser Doppler Vibrometers

Laser Doppler vibrometry is an optical method for non-contact measurement of vibrations. Modern Laser Doppler Vibrometers (LDV) measure mechanical vibrations with the highest precision. No other technology enables vibration measurements with comparable frequency range, sensitivity and resolution along with flexibility in stand-off and working distances. This makes LDV the unbeatable instrument of choice when it comes to fast and precise vibration measurements.


Measurement Principle

Working principle of a
laser doppler Vibrometer
Doppler effect, interferometry
and demodulation
From the laser beam to
the vibrational parameters


Laser source

Typical laser-beam sources
of a vibrometer
Helium-Neon or infrared laser –
Differences and scope


Signal processing

Digital processing of
the measurement data
From raw data to physical
vibration information