Understanding vibrating systems in nature and technology requires sophisticated, flexible, and ideally non-invasive measurement tools. Here, non-contact laser vibrometry proves to be the highest performing method. In industrial research and development, vibrometers are used to study objects of many different sizes, ranging from entire car bodies, airplane components, engines and buildings to tiny micro-machines and hard drive components. Countless other research applications exist in mechanical engineering, acoustics, and many other engineering-related disciplines. Measure remotely on red hot surfaces, on rotating components, analyze ultrasonic tools in the high frequency range and fully understand the dynamical behaviour of the most complex and delicate structures in 3D.