【摘要】 FIP测量中 ,计算机处理的是离散信息 ,但我们以前讨论的基于离散傅里叶变换的FIP分析方法中 ,将离散过程理想化为梳状函数的点抽样 ,未考虑CCD像元的尺寸对FTP的测量精度的影响。但实际上 ,CCD的像元是具有一定的尺寸。本文从空域卷积的角度讨论CCD像元的尺寸对FTP测量的影响 ,给出了理论分析和实验验证。使FTP中对抽样过程的讨论更符合实际测量更多还原

【Abstract】 We have introduced discrete Fourier transform analysis theory to analyze the problems about frequency overlapping in FTP,because computers deal with discrete information.But previous theory analysis,the sampling of CCD is just regarded as point-sampling,ignoring the influence of the pixel size of CCD.In fact,the pixels of CCD have certain size.Now we discuss the influence of the pixel size of CCD in FTP from the view of space convolution and give the theory analysis and experience demonstration.The discussion makes the research of sampling theory in FTP more actually and practically.更多还原