中阶梯光栅光谱仪的谱图还原与波长标定  

Spectral reducing of cross-dispersed echelle spectrograph and its wavelength calibration

作　　者：唐玉国[1] 陈少杰[1,2] 巴音贺希格[1] 崔继承[1,2] 陈今涌[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,吉林长春130033 [2]中国科学院研究生院,北京100039

出　　处：《光学精密工程》2010年第10期2130-2136,共7页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.60478043);"十一五"国家科技支撑计划重大项目(No.2006BAK03A02);国家创新方法工作专项基金资助项目(No.2008IM040700);国家重大科研装备研制项目(No.ZBYZ2008-1);中国科学院重大科研装备研制项目(No.YZ200804);吉林省重大科技攻关项目(No.09ZDGG005);吉林省科技发展计划资助项目(No.20070523;No.20086013)

摘　　要：研究了与中阶梯光栅光谱仪相关的二维重叠光谱的实时还原与波长自动标定技术。基于分光系统主色散及横向色散规律及它们之间的相互关系,建立了3个变换矩阵M1,M2和M3,由此给出了中阶梯光栅光谱仪面阵CCD上所有接收点处空间坐标与波长关系的谱图矩阵Mλ-XY,利用中心波长与自由光谱区特性获得了理想的无重叠谱图数据模型。提出了信号光斑识别方法,并对信号光斑位置坐标进行准确定位;结合所建立的谱图数据模型,实现了对二维重叠谱图的快速还原与标定。实验结果表明:该方法在中阶梯光栅光谱仪谱图分析中不仅实时性强,而且波长精度可达0.01nm,满足中阶梯光栅光谱仪高分辨率、全谱瞬态直读等要求。The key technologies for cross-dispersed eehelle spectrography, spectral reducing in real time and wavelength calibration, were researched. Based on the main dispersion, cross-dispersion and the relationship between them, the matrixes M1, M2 and M2 were established, and then the cross-dispersed echelle spectral matrixe Mλ-xy with the space coordinate on area CCD and the corresponding wavelength were given. By the characteristics of central wavelength and the free spectral range, the ideal data model without wavelength overlapping were obtained. A method to recognize the signal spots was proposed to locate the signal spot coordinate precisely. Using the data model without wavelength overlapping and the signal spot recognition, the two-dimensional overlapping echelle spectra were reduced and the wavelength was calibrated efficiently. By the result, this method is not only strong realtime in the echelle spectral analysis, but the wavelength accuracy is up to 0. 01 nm. It can satisfy the requirements of eehelle spectrograph for high resolutions, high precisions and rapid reading full spectra.

关 键 词：中阶梯光栅 谱图还原 波长标定 中心波长 自由光谱区 

分 类 号：TH744.1[机械工程—光学工程]