像面衍射场系夫琅禾费衍射

The diffraction fields at image plane belong to the Fraunhofer diffraction

提出了一个标准积分形式其被积函数由屏函数与一线性相因子的乘积构成,作为夫琅禾费衍射场的普遍定义.据此证明了有4种实验装置能接收到夫琅禾费衍射场,特别强调了像面接收装置及其优点.最后介绍了夫琅禾费衍射与傅里叶变换的关系,以及3种可供选择的相干光学信息处理系统.

A standard integral form whose integrated function equals to the product of the screen function and a linear phase-factor, as a general definition of the Fraunhofer diffraction is proposed. The four devices for receiving this field are shown, especially the receiving set-up of image-plane and its advantages is described. Finally this article introduces to the relationship of the Fraunhofer diffraction and the Fourier transform, and corresponding three kinds of the coherent optical information processing system.