激光多普勒测振技术
激光多普勒测振技术（LDV）堪称当下位移与速度分辨率表现最为卓越的测量手段，在基础科学的众多领域广泛施展身手。该技术能够实现 fm 级别的超高振幅分辨率，并且呈现出线性特征，这使得其在频率高达 8GHz 以上的极高频段，
Doppler effect
In order to understand the measuring principle of optical vibration sensors, we must first transfer the phenomenon of the Doppler effect to light waves: if a beam of light is reflected by a moving object, its frequency changes in proportion to the speed of the object. This frequency shift contains the velocity information that is used by the laser Doppler vibrometer as a measurement signal.
频闪视频显微术
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.
QTec®
QTec®首次使用多通道采集技术，从而从根本上消除了工程表面的噪声根源，获得了最高的光学灵敏度，实现了所有表面上的高保真振动测量。
QTec FAQ
QTec® is an advanced laser Doppler vibrometry technology by Polytec that enables high-precision, non-contact vibration measurements. It features high optical sensitivity, best signal-to-noise ratio on all surfaces, a broad frequency bandwidth, and no mass loading, making it ideal for demanding measurement tasks.
