Understanding Laser Vibrometers
Comprehensive information and in-depth insights into the world of laser vibrometers — the fundamentals, working principle and technology behind these high-precision instruments.
Doppler Effect
Relative motion changes the perceived frequency of a wave. This principle forms the physical basis of optical vibration measurement.
Vibration Measurement
Amplitude, frequency, phase, and mode shapes make the dynamic behavior of a component measurable. An overview of measurement parameters and analysis methods.
Laser source
Wavelength and coherence determine signal quality, speckle behavior, and the usable measurement distance. HeNe and SWIR lasers are therefore suited to different surfaces.
Signal Processing
From the photodetector to reliable measurement results: demodulation, filtering, sampling rate, FFT, and the noise floor determine the quality of vibration data.
