Fraunhofer Diffraction

夫琅禾费衍射

Fraunhofer diffraction deals with the limiting cases where the source of light and the screen on which the pattern is observed are effectively at infinite distances from the aperture causing the diffraction. The more general case where these restrictions are relaxed is called Fresnel diffraction.

夫琅禾费衍射处理的是光源和观察屏与孔径的距离可以视为无限远的极限情况。当这些限制被放松时，更一般的情况称为菲涅耳衍射。