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本文论述了一种测量干涉条纹间距的方法,这种方法应用快速傅里叶变换,不仅可以消险散斑噪声的影响,而且具有快速和实时观测等优点。
This paper discusses a method to measure the interference fringe spacing. This method uses fast Fourier transform, which not only can ameliorate the influence of speckle noise, but also has the advantages of fast and real-time observation.