干涉型光谱仪高精度光谱定标方法

发布时间：2018-07-06 13:54

本文选题：干涉型光谱仪 + 光谱定标　；参考：《光谱学与光谱分析》2015年12期

【摘要】：干涉型光谱仪获取光谱的干涉数据信息,数据处理过程中将干涉信息进行一系列光谱复原,最终得到光谱信息数据。光谱定标处理是干涉型光谱仪光谱反演的重要环节,直接决定了光谱信息的可用性和准确度。介绍了干涉型光谱仪光谱定标的基本思路,并在此基础上提出了一种基于总光程差精确解算的光谱定标方法。由于干涉型光谱仪总光程差难以精确测量,而总光程差解算是光谱定标的核心和关键,基于此情况,提出了遍历总光程差,分析光谱漂移,最终确定干涉型光谱仪总光程差的总体思路。定标处理中将所有总光程差可能值带入光谱复原流程,进行光谱复原与分析,最终得到光谱漂移最小的总光程差,即为总光程差解算值。该方法可以精确解算干涉型光谱仪的总光程差,进而对干涉型光谱仪进行高精度光谱定标。同时介绍了详细、完整的光谱定标流程,最终得到干涉型光谱仪各个波段的中心波长值、波数分辨率等。最后设计了典型的干涉型光谱仪主要参数,并生成了该光谱仪的模拟干涉数据,利用该方法对模拟数据进行光谱定标,并对光谱定标结果进行了精度分析和验证,证明该方法波数分辨率定标精度优于0.000 25cm-1。
[Abstract]:The interferometric spectrometer acquires the interference data of the spectrum. In the process of data processing, the interference information is restored by a series of spectra, and the spectral information data are finally obtained. Spectral calibration is an important step in spectral inversion of interferometric spectrometers, which directly determines the availability and accuracy of spectral information. The basic idea of spectral calibration for interferometric spectrometers is introduced, and a spectral calibration method based on the accurate calculation of total optical path difference is proposed. Because the total optical path difference of interferometric spectrometer is difficult to measure accurately, and the solution of total optical path difference is the core and key of spectrum calibration, the traversal total optical path difference is proposed to analyze the spectral drift. Finally, the total optical path difference of interferometric spectrometer is determined. In the calibration process, all the possible values of total optical path difference are brought into the spectral recovery process, and the spectral recovery and analysis are carried out. Finally, the total optical path difference with the minimum spectral drift is obtained, that is, the total optical path difference solution. This method can accurately calculate the total optical path difference of the interferometric spectrometer and then calibrate the interferometric spectrometer with high accuracy. At the same time, the detailed and complete spectral calibration flow is introduced. Finally, the center wavelength and wavenumber resolution of each band of the interferometer are obtained. Finally, the main parameters of the typical interferometer are designed, and the simulated interference data of the spectrometer are generated. The spectral calibration method is used to calibrate the simulated data, and the accuracy of the calibration results is analyzed and verified. It is proved that the calibration accuracy of wavenumber resolution is better than that of 0.000 cm ~ (-1).
【作者单位】：中国资源卫星应用中心;
【基金】：国家自然科学基金项目(41401424)资助
【分类号】：TH744.1

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