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一、基本原理散斑频谱相关法是在谱面处(放全息底片)对漫反射体的散斑做相关处理的方法,其原理如图1所示.图中G是平行激光束,O是物体,L_1是傅里叶变换透镜,L_2是聚光透镜,P·D是光电三极管。
First, the basic principle Speckle spectrum correlation method is at the spectral surface (put holographic negative film) on the diffuse speckle do related processing methods, the principle shown in Figure 1. Figure G is parallel to the laser beam, O is Object, L_1 is a Fourier transform lens, L_2 is a condenser lens, and P · D is a phototransistor.