激光多普勒测振技术
激光多普勒测振技术（LDV）拥有业界领先的位移与速度分辨率，广泛应用于基础科学领域。它可实现飞米级振幅测量，线性特性优异，在高达 8 GHz 的超高频段下仍保持精准稳定。
多普勒效应
要理解光学振动传感器的测量原理，首先需要把多普勒效应原理迁移到光波范畴：当一束光经运动物体反射时，光的频率会随物体运动速度成比例发生改变。这种频移中包含了速度信息，激光多普勒测振仪正是将其作为测量信号来使用。
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.
