频闪剪切散斑干涉术的研究

提出了一种用于振动研究的方法——频闪剪切散斑干涉照相法。该方法由于采用了剪切镜，能得到较为精确的散斑剪切图，提高了测量的精度，是一种用于振动研究较为理想的散斑照相的新方法。讨论了频闪剪切散斑干涉术的基本原理，给出了频闪剪切散斑图的全场分析的平均光强分析的解析式，并给出了实验结果。理论和实验都表明频闪剪切散斑干涉照相法要优于时间平均剪切散斑干涉照相法。该方法在全场滤波分析时，能给出任一瞬时物体振动信息，得到清晰的、高衬比的全场干涉条纹图，是一种实用可行的方法。

Study of Stroboscopic Shearing Speckle Interferometry

Stroboscopic shearing speckle interferometrya method for investigation of vibrations is proposed. While the shearing lens is used, the speckle shearing picture is performed, to improve the precision of measuring. The fundamental principle of stroboscopic shearing speckle interferometry is discussed. For a specklegram of stroboscopic shearing in whole field analysis, the analytic formula of the distribution of the mean intensity of light and experimental result are given. Both theory and experiments show that stroboscopic shearing speckle interferometry is obviously superior to time-average method. In the whole field filtering, the information of vibration at any moment can be easily obtained ,and images obtained are quite clear.