红外干涉信号采样误差分析及修正方法研究

量子电子学报

红外干涉信号采样误差分析及修正方法研究

李亚凯1,2,3, 徐亮1,3, 金岭1,3, 李胜1,3, 叶树彬1,2,3, 胡荣1,2,3, 李妍1,2,3, 高闽光1,3, 刘建国1,3

1中国科学院安徽光学精密机械研究所，中国科学院环境光学与技术重点实验室，安徽合肥 230031; 2中国科学技术大学，科学岛分院，安徽合肥 230026; 3安徽省环境光学监测技术重点实验室，安徽合肥 230031

出版日期:2018-03-28 发布日期:2019-06-11
通讯作者: 徐亮(1981-),安徽芜湖人,研究员,博士生导师,从事傅里叶变换红外光谱分析方法和应用研究工作。 E-mail: xuliang@aiofm.ac.cn
作者简介:李亚凯(1991-),河南禹州人,研究生,从事数据处理算法和面向对象软件开发。Email: ykli@aiofm.ac.cn
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 41405029)， National Major Scientific Instruments and Equipment Development Projects of China(国家重大科学仪器设备开发专项, 2013YQ22064302)， National Key Research and Development Program of China(国家重点研发计划, 2016YFC0803001-08)，Key Research Program of Frontier Sciences，CAS(中国科学院前沿科学重点研究项目, QYZDY-SSW-DQC016)，Key Research and Development Plan of Anhui Province(安徽省重点研究与开发计划, 1704c0402196)，National Key Technology R&D Program of China(国家科技支撑计划, 2014BAC17B01)

Error analysis and correction method of infrared interference signal sampling

LI Yakai1,2,3, XU Liang1,3, JIN Ling1,3, LI Sheng1,3, YE Shubin1,2,3, HU Rong1,2,3, LI Yan1,2,3, GAO Minguang1,3, LIU Jianguo1,3

1 Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2 Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China; 3 Key Laboratory of Optical Monitoring Technology for Environment, Anhui Province，Hefei 230031, China

Published:2018-03-28 Online:2019-06-11

摘要/Abstract

摘要： 傅立叶变换红外(FTIR)光谱系统用He-Ne激光干涉信号作为参考信号，存在过零点采样误差。基于光的干涉原理，通过傅里叶变换建立了FTIR光谱仪采样误差与光谱鬼线位置和强度之间的理论仿真模型。为降低采样误差，采用三次样条插值法修正过零点误差，线性插值法重建红外光干涉信号强度。结果表明该模型可以作为由采样误差引起光谱误差修正算法的理论依据，三次样条插值法用于He-Ne信号过零点重建能减小采样误差，误差范围降低了93%，线性插值法用于红外光信号强度重建能提升光谱信噪比,平均提升5.7%。

关键词: 傅里叶光学, 傅里叶变换红外光谱仪, Brault采样方法, 采样误差分析

Abstract: Fourier transform infrared (FTIR) spectroscopy system uses He-Ne laser interference signal as a reference signal, but there is zero crossing sampling error. Based on the principle of light interference, a theoretical simulation model between FTIR spectroscopy sampling error and spectral ghost line position and intensity is established by Fourier transform. In order to reduce the sampling error, the cubic spline interpolation method is used to correct the zero crossing error, and intensity of the infrared optical interference signal is reconstructed by linear interpolation method. Results show that the model can be used as a theoretical basis for spectral error correction algorithm caused by sampling error. The cubic spline interpolation method can reduce the sampling error on reconstruction of He-Ne signal zero-crossing, and the error range is reduced by 93%. The linear interpolation method is applied to reconstruction of the infrared light intensity signal, which can improve the spectral signal to noise ratio, with an average increase of 5.7%.

Key words: Fourier optics, Fourier transform infrared spectrometer, Brault sampling method, sampling error analysis

李亚凯1,2,3, 徐亮1,3, 金岭1,3, 李胜1,3, 叶树彬1,2,3, . 红外干涉信号采样误差分析及修正方法研究[J]. 量子电子学报.

LI Yakai1,2,3, XU Liang1,3, JIN Ling1,3, LI Sheng1,3, YE Shubin1,2,3, HU Rong1,2,3, . Error analysis and correction method of infrared interference signal sampling[J]. Chinese Journal of Quantum Electronics.

参考文献

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