Laser Doppler vibrometry (LDV) is currently the method that offers the best displacement and velocity resolution and is used in many fields of basic science. It enables femtometer amplitude resolution and is linear and therefore has a consistent amplitude right up to the very high frequency ranges – reaching more than 2 GHz at present.
Stroboscopic video microscopy (SVM) makes use of the fact that high-frequency vibrations at component level can be visualized with normal video cameras when rapid movements are visually frozen using short flashes of light.
Single-point measurement, measuring with multiple laser beams at the same time, areal scanning of entire surfaces or three-dimensional vibration shape analysis. Learn more about the different types of Polytec vibrometers.