【摘要】 光学系统是光谱仪的核心部件,决定了整个仪器的基本性能与体积。因此分析了几种光学系统的利弊,最终确定采用交叉非对称切尔尼-特纳系统,并用Zemax软件对光路进行了优化设计,确定整体分辨率为1.8 nm,测量范围为200~900 nm。利用Matlab软件求解最小二乘法三阶多项式的拟合系数,采用HG-1汞-氩校准光源对波长进行三阶曲线拟合校正,使其相对波长误差控制在0.05 nm以内。与USB4000光纤光谱仪进行了数据对比分析,表明该设计思路及方法切实可行。更多还原

【Abstract】 The optical system is the core part of a spectrometer, and it determines the basic properties and the volume of the entire instrument. Advantages and disadvantages of several optical systems are analyzed, and the asymmetric Czerny-Turner system is adopted. The resulting optical path optimized with Zemax has an overall resolution of 1.8 nm, and a measurement range of 200~900 nm. Relative error of wavelength is controlled to be below 0.05 nm, with cubic spline interporlation coefficients obtained from Matlab and HG- 1 mercury- argon used as the calibration light source. Analyses on data for comparision with the USB4000 fiber spectrometer show that both of the design and implementation are feasible.更多还原