用拼接法获取大面积衍射光栅

Manufacturing large-size grating by mosaic way

近年来大面积衍射光栅已成为许多大型高技术工程项目的关键元件 ,它的获取方法也一直是光栅界探求的目标 ,本文简要回顾衍射光栅研制技术的发展历史 ,介绍了衍射光栅的发展趋势以及国内外研制大面积衍射光栅的技术现状 ,说明了拼接光栅的原理、方法以及利用这种方法来获取大面积衍射光栅的诸多优点。目前拼接光栅中各小光栅的衍射波阵面的位相还没有做到完全一致 ,要做到一致还需做很多工作 ,但用拼接手段来获取大面积光栅已是一种非常有效的方法。

The large-size diffraction gratings have become the key unit of some major engineering. All of grating experts around the world are searching the way to produce the large size gratings. This paper reviewed the history of grating manufacturing and introduced the trend of grating development, meanwhile, described the principle of the mosaic gratings. By analyzing the way which foreign country made mosaic gratings, we found the diffraction wave front of every grating is out of phase in a large one and there are a lot of things to do for it to be in-phase. But there are many advantages for manufacturing large-size gratings by mosaic way. We come to a dicision, at present, the way of mosaic gratings is a very effective method for manufacturing large-size gratings.