Transient vibration measurements using multi-pulse digital holography
Transient vibration measurements using multi-pulse digital holography
复制标题
使用多脉冲数字全息术进行瞬态振动测量
DOI：
10.1016/s0030-3992(97)00048-0
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
H. Tiziani
中科院分区：
文献类型：
--
作者：
G. Pedrini;P. Fröning;H. Fessler;H. Tiziani
将描述一种用于评估瞬时变形的光学系统。为了提高时间分辨率，使用了产生四个脉冲的红宝石激光器。测试对象的四个独立的数字全息图(每个脉冲一个全息图)在几微秒内被记录在三个CCD传感器上。用傅里叶方法对数字全息图进行了定量评价。相位由复幅值求出，不同时刻的变形量由相减法计算。给出了实验结果。
An optical system for the evaluation of transient deformations will be described. In order to increase the temporal resolution, a ruby laser producing four pulses has been used. Four separate digital holograms (one hologram for each pulse) of the test object are recorded in a few microseconds on three CCD sensors. The Fourier method is used for the quantitative evaluation of the digital holograms. The phases are obtained from the complex amplitudes, and the deformation at different times is calculated from phase subtraction. Experimental results are presented.