利用阿贝成像原理制作全息光栅的理论分析

Theoretical Analysis of Holographic Grating Fabrication Based on Abbe Imaging Principle

用相干光源照射黑白光栅,并通过透镜得到黑白光栅的像。在黑白光栅的频谱面上设置光阑,仅让±1 级衍射光通过,这样在像平面就得到全息光栅。通过改变物距和像距,可以连续改变横向放大率,从而改变像平面上光强分布的空间频率,于是在像平面上就得到强度按余弦规律变化的全息光栅。

By placing an aperture on the rear focus plate of black-white grating and letting only ± 1 order diffracted beams pass, we can get a holographic grating on the image plate. Using this method, we can change the spatial frequency easily.