In the analysis of the on-axis intensity for a highly focused optical field, it is highly desirable to deal with effective relations aimed at characterizing the field behavior in a rather simple fashion. Here, a novel and adequate measure for the size of the region where the axial power content mainly concentrates is proposed on the basis of an uncertainty principle. Accordingly, a meaningful relationship is provided for both the spread of the incident beam at the entrance of the highly focused optical system and the size of the region where the on-axis power mainly concentrates.

中文翻译：

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高聚焦场轴向功率含量的不确定性原理

在针对高度聚焦的光场的轴上强度的分析中，非常希望以相当简单的方式处理旨在表征场行为的有效关系。在此，基于不确定性原理，提出了针对轴向功率含量主要集中的区域的大小的新颖且适当的措施。因此，对于入射光束在高度聚焦的光学系统的入口处的扩散和轴上功率主要集中的区域的大小两者，都提供了有意义的关系。