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guang xue kong jian lv bo
Author(s): 
Pages: 1-3
Year: Issue:  5
Journal: Journal of Higher Correspondence Education(Natural Science Edition)

Keyword:  空间频率频谱面彩色图像复振幅分布物平面光学空间滤波低通滤波器匹配滤波器位相物体位相分布;
Abstract: <正> 当用阿贝的二次衍射理论来理解透镜的成像过程时,透镜后焦面上的每一亮斑(衍射极大值)与平行光通过物平面后物面上的复振幅分布紧密相关,我们称它为空间频率。若物平面上的复振幅分布具有周期性(如衍射光栅),则空间频率是分立的;若物平面上的复振幅分布是
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