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。
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 Kirchhoff diffraction.
基于基尔霍夫标量衍射理论，详细分析了输入、输出平面及变换函数抽样间距的选取原则。
Based on the Kirchhoff scalar diffraction theory, the principle to choose sampling periods in the input plane, output plane and transformation function was analyzed in detail.
根据辐射理论重新设定了平面衍射物的边界函数，并以此条件推导了基尔霍夫衍射公式，并赋予新的含义。
Firstly according to radiation theory the boundary function of planar diffraction body is given, based on this condition the Kirchhoff diffraction formula is deduced and obtained.
基于基尔霍夫标量衍射理论，采用光线追迹法设计了连续型平面衍射聚光透镜掩模。
According to Kirchhoff's scalar diffraction theory, with the ray tracing method, a continuous relief mask for diffractive focus lens has been designed.
结果表明，边界波处理方法中的基尔霍夫和瑞利-索末菲理论，分别与直边衍射的严格电磁理论解中的电场分布和磁场分布符合较好。
The field distributions given by Kirchhoff theory and Rayleigh-Sommerfield theory are studied respectively, and further comparisons with the exact electromagnetic theory are also given.
结果表明，边界波处理方法中的基尔霍夫和瑞利-索末菲理论，分别与直边衍射的严格电磁理论解中的电场分布和磁场分布符合较好。
The field distributions given by Kirchhoff theory and Rayleigh-Sommerfield theory are studied respectively, and further comparisons with the exact electromagnetic theory are also given.
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