Pedrini Giancarlo, Osten Wolfgang, Gusev Mikhail E
Institut fur Technische Optik, Universitat Stuttgart, Germany.
Appl Opt. 2006 May 20;45(15):3456-62. doi: 10.1364/ao.45.003456.
A system based on digital holographic interferometry for the measurement of vibrations is presented. A high-power continuous laser (10 W) and a high-speed CCD camera are used. Hundreds of holograms of an object that has been subjected to dynamic deformation are recorded. The acquisition speed and the time of exposure of the detector are determined by the vibration frequency. Two methods are presented for triggering the camera in order to acquire at a given phase of the vibration. The phase of the wavefront is calculated from the recorded holograms by use of a two-dimensional digital Fourier-transform method. The deformation of the object is obtained from the phase. By combination of the deformations recorded at different times it is possible to reconstruct the vibration of the object.
提出了一种基于数字全息干涉术的振动测量系统。使用了一台高功率连续激光器（10W）和一台高速电荷耦合器件（CCD）相机。记录了数百张经历动态变形的物体的全息图。探测器的采集速度和曝光时间由振动频率决定。提出了两种触发相机的方法，以便在振动的给定相位进行采集。通过使用二维数字傅里叶变换方法从记录的全息图中计算波前的相位。从相位中获得物体的变形。通过组合在不同时间记录的变形，可以重建物体的振动。
