Ebert-Fastie型双层结构平面全息光栅双单色仪的光学设计  

Optical Design of Holographic Plane Grating Double Monochromator with the Double Decked Ebert-Fastie Structure

作　　者：薛庆生[1] 王淑荣[1] 李福田[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室

出　　处：《光电工程》2008年第7期116-120,共5页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(40675083)

摘　　要：为满足空间紫外遥感高精度光谱辐射测量工作的要求,设计了一种Ebert-Fastie型双层结构平面全息光栅双单色仪,由球面准直聚光镜、平面和屋脊转向镜、平面全息光栅及入射、出射和中间狭缝组成,扫描波长范围160～400nm。这种双层结构的特点在于两块完全相同的平面全息光栅安装在同一转轴上做到同轴转动,不但把机构基本上简化为一个单色仪的结构,而且确保了两块光栅同步地进行光谱扫描,色散相加,光谱分辨率小于0.15nm。此外,前后两单色系统被隔成基本封闭的腔体,用来割断两单色系统杂散光之间的相互影响,抑制整个系统的杂散光,整个系统的杂散光水平可达10-6,满足空间紫外遥感高精度光谱辐射测量的要求。For the need of high-precision spectral radiance measurement, a holographic plane grating double monochromator with the double decked Ebert-Fastie structure is designed. This system consists of two spherical collimating mirrors, a plane mirror, a roof mirror, two holographic plane gratings, entrance slit, exit slit and mid slit. Wavelength region from 160nm to 400nm can be scanned. This double decked design has a compact structure, high spectral resolution and low stray level. Its spectral resolution is less than 0.15nm, and stray level is 10^-6, which satisfies the need of high-precision spectral radiance measurement in ultraviolet wavelength region in space.

关 键 词：双单色仪 色散相加 杂散光 线色散率 分辨率 

分 类 号：TH744.1[机械工程—光学工程]