建立严格衍射积分的简单方法

本文依据一个基本假设来建立光波传播空间的传递函数和空间脉冲响应的精确表达式及衍射积分。这一方法较经典的电磁场理论方法和一般傅里叶光学文献中的方法简单明瞭。如此建立衍射式将自动排除 Kirchhoff 衍射理论中边界条件的不自洽性,而得到与自洽的 Sommerfeld 理论相吻合的结果。文章表明,衍射现象唯一取决于光传播空间的特性,而这一特性正是光的波动性的必然结果。衍射现象实际上也是信息在传递过程中通常总会产生一种失真现象。

A Simple Method for Obtaining Strigent Diffraction Integral

On the basis ofasimple assumption,the transfer function,the precisespatial impulse response and the diffraction integrals can be obtained.Thismethod is simpler and easier to use than that based on the electromagnetic fieldtheory or that presented in the literatures of Fourier optics with this method,the self-unconsistency of boundary conditions in the Kirchhoff's diffractiontheory will be removed voluntarily.This paper shows that the diffractionphenomenon depends on the property of space in which the optical wave fieldsare propagated,and this property is an inevitable outcome of the wave-motionof light.In practice,the diffraction phenomenon is also a distorted phennomenon that may occur in information tranmission.