2023年第2期仪表技术与传感器InstrumentTechniqueandSensor2023No.2基金项目:国家重点研发计划项目(2018YFB0504600);中国电波传播研究所稳定支持科研经费资助项目(A132001W03)收稿日期:2022-02-16单光束紫外分光光度计波长准确度分析与修正陈建波1,2,林冠宇1,杨小虎1(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.中国科学院大学,北京100049)摘要:为了提高单光束紫外分光光度计的波长准确度,基于光栅色散原理对影响紫外分光光度计系统波长输出准确度的各项因素及特征进行了分析,提出了将结构修正与光学定标修正相结合的综合波长修正方法。利用该综合修正方法对研制的单光束紫外分光光度计进行波长修正,修正后在100~400nm波段范围内的波长精度由±0.2nm提高到±0.07nm。实验结果证明了单光束紫外分光光度计波长准确度分析的合理性以及结构修正与光学定标修正相结合的综合波长修正方法的有效性。关键词:分光光度计;波长准确度;波长精度;波长修正;凹面光栅中图分类号:TP212文献标识码:A文章编号:1002-1841(2023)02-0027-07AnalysisandCorrectionofWavelengthAccuracyofSingle-beamUVSpectrophotometerCHENJian-bo1,2,LINGuan-yu1,YANGXiao-hu1(1.ChangchunInstituteofOptics,FineMechanicsandPhysics,ChineseAcademyofSciences,Changchun130033,China;2.UniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:Inordertoimprovethewavelengthaccuracyofthesingle-beamUVspectrophotometer,thefactorsandcharacter-isticsaffectingthewavelengthoutputaccuracyoftheUVspectrophotometersystemwereanalyzedbasedonthegratingdispersiontheory,andcomprehensivewavelengthcorrectionmethodcombiningofstructuralcorrectionandopticalcalibrationcorrectionwasproposed.Thiscomprehensivecorrectionmethodwasusedtocorrectthewavelengthofthesingle-beamUVspectrophotometerde-velopedinthelaboratory.Aftercorrection,thewavelengthaccuracyintherangeof100~400nmwasimprovedfrom±0.2nmto±0.07nm.Theexperimentalresultsdemonstratetherationalityofthewavelengthaccuracyanalysisofthesingle-beamUVspectro-photometerandtheeffectivenessofthecomprehensivewavelengthcorrectionmethodcombiningstructuralcorrectionandopticalcalibrationcorrection.Keywords:spectrophotomete...