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分辨率理论难以客观给出图象的空间自由度数．本文初步建立了调制传递函数与扁球波函数及其本征值的关系，试图为解决成象空间自由度用于一般成象系统的困难做些基础工作．
Resolution theory is difficult to objectively give the number of spatial freedom of the image. In this paper, the relationship between the modulation transfer function and the spherical wave function and its eigenvalue is preliminarily established, and some basic work is attempted to solve the difficulty of using imaging space as a general imaging system.