摘要
在传统光学传递函数（ＯＴＦ）计算中，总假设象对物的横向放大率不变。这种变形成象对ＯＴＦ精度影响很大，但是人们一直没有找到解决此问题的好办法。本文从基尔霍夫衍射积分出发重新推导点象的振幅分布，并以出瞳坐标表示ＯＴＦ自相关积分，进而利用分片多项式插值解决变形成象ＯＴＦ的计算问题。同时，对文［４］中按菲涅尔近似给出的ＯＴＦ公式作出比较。
In the traditional methods of computing the OTF,it is general that the transversal magnification is supposed to be not changeable in the whole aperture,though the anamorphic imaging produces considerable errores in the calculation of the OTF.People do not still find a good method to solve the problem.Starting from the Kirchhoff diffraction integral,the classical formula of the OTF in the Fraunhofer approximation is a new derived in the exit pupil coordinates and in the entrance pupil coordinates.Using piecewise polynomial interpolation,the OTF in the exit coordinates is studied for anamorphic imaging.It also gives comparison with the OTF formula of in the Fresnel approximation.
出处
《计算物理》
CSCD
北大核心
1998年第3期61-66,共6页
Chinese Journal of Computational Physics
关键词
光学传递函数
基尔霍夫衍射积分
夫琅和费近似
变形成象
分片多项式插值
optical transfer function
Kirchhoff diffraction integral
Fraunhofer approximation, anamorphic imaging
piecewise polynomial interpolation.
