散斑

The method of speckles displacement, a new attempt to test characters of space distribution of laser Gaussian beam, is presented. 提出一種測量激光高斯光束空間分布特征的新方法散斑位移法。

The diffraction formula and statistical law of optical fields are used to get the cross-correlation function of intensities of laser speckles of the moved diffuse object. 該方法利用光傳播的菲涅爾衍射公式和光場的統(tǒng)計規(guī)律，給出散斑場光強在散射體位移前后的高斯光束相關(guān)函數(shù)的表達式。