The zoning rules for two dimensional ring of Frensel zone plate is studied by means of Kirchhoffdiffraction formula.
从基尔霍夫绕射公式出发进一步研究菲涅耳区板的二维圆环的分区规则。
2
For infrared optical systems a point spread function is calculated in terms of the spot diagram obtained through geometrical ray trace or the theory of Kirchhoffdiffraction.
对红外光学系统，用几何光线追迹得到点列图或用基尔霍夫衍射理论计算得到点扩散函数。
3
Firstly according to radiation theory the boundary function of planar diffraction body is given, based on this condition the Kirchhoffdiffraction formula is deduced and obtained.