直接驱动型光栅单色仪的波长标定  

Wavelength Calibration of Grating Monochromator Directly Driven by Stepping Motor

作　　者：李香香 牛海波[2] 刘会玲[2] 竹有章 LI Xiang-xiang;NIU Hai-bo;LIU Hui-ling;ZHU You-zhang(Department of Nursing,Xi’an Jiaotong University City College,Xi’an 710018,China;Department of Physics,Xi’an Jiaotong University City College,Xi’an 710018,China)

机构地区：[1]西安交通大学城市学院护理系,西安710018 [2]西安交通大学城市学院物理系,西安710018

出　　处：《自动化与仪表》2022年第11期76-79,共4页Automation & Instrumentation

基　　金：陕西省自然科学基础研究计划项目(2021JM-541);西安交通大学城市学院校级科研项目(2021Y01)。

摘　　要：单色仪是光谱测量设备的核心组件,其中光栅单色仪最为常见。随着电子技术的发展,当前的单色仪大多不再使用复杂的驱动装置而直接采用步进电机控制光栅转动。从光栅衍射方程出发,推导了步进电机转动步数和单色仪输出波长的定量关系并对其进行了实验验证。按照所得关系对一台单色仪进行了标定并对汞灯光谱进行了实际测量,结果表明,在整个测量范围内测量值和标准值高度一致,具有很好的实用性。标定过程不包含任何拟合,仅依据硬件参数,并讨论了在未知情况下确定各参数的方法。和简化的线性标定进行了比较,发现线性标定在小范围内具有较好的近似度。对于相关设备的使用和维护,以及自主开发光谱测量设备有重要参考价值。Monochromator is a core component of spectral measurement equipment,and grating monochromator is the most common one.With the development of electronic technology,the complex driving device has been elided in most of the current monochromators and the grating is driven directly by stepping motor.Based on the grating diffraction equation,the quantitative relationship between the step-number of motor and the output wavelength of the monochromator was deduced and it was verified in experiment.A monochromator was calibrated and the spectrum of a mercury lamp was obtained.The results show that the measured wavelengths of emission lines are highly consistent with the standard values in the whole spectral range,indicating good practicability of the calibration method.The calibration does not include any fitting process,involves only the hardware parameters.The method to determine these parameters when they are unknown is also discussed.Compared with the simplified linear calibration,it is found that the linear calibration is a better approximation in a small range.These contents are valuable to the usage,maintenance,and development of spectral measurement equipment.

关 键 词：光栅单色仪 波长标定 步进电机 光谱测量 

分 类 号：TH744[机械工程—光学工程]