多通道共光栅转轴太阳光谱仪波长非线性研究  

Wavelength Nonlinearity of Multi-Channel Solar Spectrometer with Common Grating Rotating Axis

作　　者：李占峰[1] 黄煜[1] 王淑荣[1] 于淼[2] 林冠宇[1] 张子辉[1] 曹佃生 Li Zhanfeng;Huang Yu;Wang Shurong;Yu Miao;Lin Guanyu;Zhang Zihui;Cao Diansheng(State Key Laboratory of Applied Optics , Changchun Institute of Optics , Fine Mechanics and Physics ,Chinese Academy of Sciences , Changchun , Jilin 130033, China;Load and Ground Application Technology Laboratory , Shanghai Institute of Satellite Engineering ,Shanghai 200240, China)

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,吉林长春130033 [2]上海卫星工程研究所载荷与地面应用技术研究室,上海200240

出　　处：《中国激光》2019年第9期308-312,共5页Chinese Journal of Lasers

基　　金：国家重点研发计划(2018YFF01011003)

摘　　要：为了提高多通道光栅扫描光谱仪的波长定标精度,在介绍传统单通道光栅光谱仪线性波长扫描原理的基础上,分析并推导了多通道光谱仪中,共用光栅轴装调误差导致的光谱仪输出波长与丝杠移动距离的理论非线性公式。利用该非线性公式作为波长定标公式对风云三号太阳辐照度光谱仪原理样机进行波长定标,结果表明:传统线性公式的定标精度为0.08 nm,利用波长非线性公式可将波长定标精度提高到0.03 nm,满足仪器的波长定标精度,验证了多通道光栅扫描光谱仪波长非线性关系的准确性。To improve the wavelength calibration accuracy of multi-channel grating scanning spectrometers, the principle of linear wavelength scanning of traditional single-channel grating spectrometers is first introduced. Then, the theoretical nonlinear relationship between the spectrometer's output wavelength and the moving distance of the lead screw is derived based on the common grating axis error. Given the nonlinear relationship, wavelength calibration of a prototype of Fengyun-3 solar irradiance spectrometer is performed. The results demonstrate that the calibration accuracy of the traditional calibration is 0.08 nm, and the calibration accuracy is increased to 0.03 nm by using the wavelength nonlinear formula. This result satisfies the requirements of the i*nstrument s specifications. Thus, the wavelength nonlinear relationship of a multi-channel grating scanning spectrometer is verified.

关 键 词：光谱学 光栅光谱仪 波长定标 多通道光谱仪 波长非线性 正弦结构 

分 类 号：TP731[自动化与计算机技术—检测技术与自动化装置]