【摘要】 根据准确的菲涅耳衍射振幅和光强解析表达式推导出光学系统像点附近的光强空间分布。与采用洛梅尔函数计算不同,文中使用常用的贝塞尔函数准确地计算了光强空间分布,从而使计算更容易、结果更直观。并对菲涅耳数这一物理概念进行了论述。更多还原

【Abstract】 Intensity space distribution near image point of optical system is derived based on the accurate amplitude (therefore the intensity) analytic expression for Fresnel diffraction. In contrast to Lommel functions, the intensity space distributions are calculated accurately with conventional Baessel function, so it is convenient to be used and the results are perceived more directly. The concept of Fresnel number is also discussed.更多还原