d→0时衍射光栅的光强分布

Light Intensity Distribution of Diffractive Grating When d→0

光栅衍射花样是由夫琅禾费衍射对多光束干涉调制的结果,本文讨论了光栅长度不变,随着光栅常数d的减少,通过缝数N的增加,保持Nd为常数时衍射光栅的光强分布,并得出,当d→0时,衍射光栅的光强分布与单缝夫琅禾费衍射的光强分布形式一致。

The diffraction pattern is the result of the fraunhofer single slit diffraction intervening and modulating the multi-light beam. This paper discussed the relationship among grating coefficient d, the numbers of slits and the light intensity when length of grating fixedness. The author educes the conclusions below ： the light intensity distributions of diffractive grating are consistent with the light intensity distributions of the fraunhofer single slit diffraction when d→O.