凹面光栅成像的谱线线形以及杂散光的计算

CALCULATION OF THE LINE PROFILES AND STRAY LIGHT DISTRIBUTIONS FORMED BY CONCAVE GRATINGS

提出了一种计算凹面光栅成像的谱线强度分布和计算凹面光栅３种随机误差造成的杂散光强度分布的方法，这种方法在采用光线追迹方法的同时，也考虑到了凹面光栅的衍射效率及光栅误差造成的衍射及散射作用。

This paper presents a method for computing both the line profiles of spectral images formed by concave gratings and the stray light distributions caused by three kinds of imperfections of concave gratings. This method takes account of the diffraction efficieny of concave gratings and the effects of diffraction and scattering caused by concave gratings' imperfections, while calculating the line intensities from spot diagram. An example is given for a Seya_Namioka monochromator.