Then, the effective distance expression of angular spectrum along optical axis has been introduced by comparing this equation with the free propagation equation.

接下来，将此传输方程与光在自由空间的传输方程相比较，引入了角谱轴向传输的等效距离公式。

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Then, the effective distance expression of angular spectrum along optical axis has been introduced by comparing this equation with the free propagation equation.

接下来，将此传输方程与光在自由空间的传输方程相比较，引入了角谱轴向传输的等效距离公式。

youdao