中国光学2018，Vol.11Issue(2)：219-230,12.DOI:10.3788/CO.20181102.0219
紫外双光栅光谱仪结构设计与波长精度分析
Structure design and wavelength accuracy analysis of ultraviolet double grating spectrometer
摘要
Abstract
In order to observe the solar spectrum between 170 nm to 380 nm precisely,an ultraviolet double grating spectrometer with its wavelength repeatability accuracy better than±0.02 nm has been designed.A wavelength scanning mechanism is the key module of the ultraviolet double grating spectrometer.Mechanical parameters are derived from optical parameters according to the grating dispersion principle.Error sources which influence the spectrometer wavelength repeatability error have been analyzed.According to the analysis results,the repeatability error of the lead screw is the main error source.A wavelength scanning mechanism has been assembled with a±2 μm accuracy lead screw,and the spectrometer mechanism structure has been designed.Experiments have been carried out with a mercury lamp as light source to verify wavelength repeat-ability.The experiment results show that the wavelength repeatability of the spectrometer is between-0.005 nm and+0.007 nm,which is better than the required accuracy of±0.02 nm.关键词
双光栅光谱仪/波长扫描机构/波长重复性/凹面光栅/误差分析Key words
double grating spectrometer/wavelength scanning mechanism/wavelength repeatability/concave grating/error analysis分类
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曹佃生,林冠宇,杨小虎,张子辉,闻宝朋..紫外双光栅光谱仪结构设计与波长精度分析[J].中国光学,2018,11(2):219-230,12.基金项目
国家自然科学基金重大科研仪器设备研制专项(No.41527806)Supported by Major Scientific Instruments&Equipment Special Project of National Natural Science Foundation of China(No.41527806) （No.41527806）
