线性相关计算法形成数字剪切散斑相关条纹图

DIGITAL SHEARING SPECKLE CORELATION FRINGES PATTERN FORMED BY USING LINEAR COKRELATION Calculating Method

本文提出了用线性相关计算法形成数字剪切散斑干涉条纹的新方法，从理论分析和实验研究均证明，用该方法所获得的数字剪切散斑相关条纹图在图象监视器上易于观看，条纹图象光强无直流分量影响且可见度较减模式要高，该新方法的采用为今后的条纹图象分析奠定了基础。

In this paper it is put forward that digital shearing speckle correlation fringes pattern can beformed by using the new method of the linear correlation calculation. From the theory analysis andexperiment,it is verified that the digital correlation fringes pattern obtained by using this method hasseveral features,firstly,it can be seen very easily on the monitor,secondly,the light intensity of thisfringes pattern is not affected by the DC component of the speckle pattern,and thirdly linearcorrelation calculating fringes pattern has better visibility than subtraction fringes pattern. Theapplication of this new method to form digital speckle fringes pattern makes a improvement for fringesanalysis.