Czerny-Turner正交型光栅单色仪的波长校准  

Wavelength Calibration Research on the Automatic Grating Monochromator for Orthogonal Czerny-Turner Structure

作　　者：寇婕婷[1,2] 巴音贺希格[1] 唐玉国[1] 齐向东[1] 于宏柱[1] 

机构地区：[1]中国科学院长春光学机密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100049

出　　处：《光谱学与光谱分析》2012年第4期1127-1131,共5页Spectroscopy and Spectral Analysis

基　　金：国家"十一五"科技支撑计划重大项目(2006BAK03A02);中国科学院重大科研装备研制项目(YZ200804);吉林省科技发展计划项目(20070523;20086013);吉林省重大科技攻关项目(09ZDGG005)资助

摘　　要：研究了Czerny-Turner正交型光栅单色仪的波长校准技术。结合单色仪的结构参数和特点,提出以符合光栅方程的正弦曲线作为仪器出射波长的校准方程,基于最小二乘法原理给出校准方程的拟合残差表达式,由于校准方程的非线性,应用二维Nelder-Mead单纯形法求解拟合残差的待定系数,建立了波长与光栅转角的精确表达式,并通过实验验证了该算法的准确性。结果表明,经过校准的单色仪波长定位精度小于0.1nm,比设计要求提高一个数量级。该方法在Czerny-Turner正交型光栅单色仪的波长校准过程中,应用简单,容易实现,只需稍加修改步进电机的控制程序,即可完成对仪器出射波长的快速实时校准,实用性强。The wavelength calibration research on the automatic grating monochromator for orthogonal Czernyturner structure was investigated. Combined with the structure parameters and characteristic of this monochromator, the sinusoid that accords with the grating equation was proposed as the function of the wavelength calibration. Based on the principle of the least square method, the formula of the fitting residual error of the wavelength calibration was given. Using the NelderMead simplex meth od, the undetermined coefficient of the fitting residual error was solved, which founded the precise formula between the wave length and the grating turning angle. The accuracy of the method was verified through the experiment. The calibrated wave length precision of the monochromator is less than O. 1 nm, which satisfies the application requirement. Applied in the wave length calibration of the automatic grating monochromator with orthogonal CzernyTurner structure, this method is simple to ap ply and easy for implementation. Using this method, the wavelength calibration can be realized quickly and realtimely, but it is only needed to modify the control program of the stepping motor slightly, which shows a better practicability.

关 键 词：光栅单色仪 Czerny-Turner结构 波长校准 Nelder-Mead单纯形法 

分 类 号：O433.4[机械工程—光学工程]