基于相位相关性的傅里叶变换光谱数据的相位误差修正方法

王彩玲; 李玉山; 刘学武; 胡炳樑

应用光学, 2011, 32 (5): 878, 网络出版: 2011-11-18

基于相位相关性的傅里叶变换光谱数据的相位误差修正方法

Phase error correction in Fourier transform spectrometer based on phase correlation

论文大纲

王彩玲 ^*李玉山刘学武胡炳樑

作者单位

中国科学院西安光学精密机械研究所，陕西西安 710119

傅里叶变换光谱成像仪相位误差误差校正干涉曲线对称性 Fourier transform spectral imager phase error error connection interference curve symmetry

摘要

相位误差的校正是傅里叶变换成像光谱仪数据处理的重要环节之一。针对干涉曲线的对称性特征，利用相位相关性计算方法，提出一种新的傅里叶变换光谱数据的相位校正的方法。将相位相关性拟合为Sinc函数，计算亚像素的偏移量，采用离散余弦变换转换到光谱域。使用标准光谱库中的源光谱数据作为原始数据，将通过离散余弦变换仿真的干涉数据与该方法得到的结果进行比较和验证，并与Mertz方法进行了对比。结果表明: 该方法精度优于Mertz方法，并且计算简单。

Abstract

Phase error correction (PEC) is an important step during hyperspectral data processing of the Fourier transform spectrometer. We present a new method for phase correction of the Fourier transform data according to the symmetry of interference curve and the calculation of phase correlation method. The phase correlation is fitted to Sinc function, the sub-pixel offset is calculated, and the interference curve is converted into spectral domain through discrete cosine transform (DCT). The interference data simulated by DCT is compared with the data by Mertz method, and the results shows that the proposed method has higher correction accuracy than Mertz and simple calculation.

参考文献

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LIU Yue, ZHAO Yong-chao,GENG Xiu-rui,et al.Analysis of the phase error non-linearity of FTS and discussion about Mertz method［J］.Spectroscopy and Spectral Analysis,2009,29(7):1809-1812.(in Chinese with an English abstract)

王彩玲, 李玉山, 刘学武, 胡炳樑. 基于相位相关性的傅里叶变换光谱数据的相位误差修正方法[J]. 应用光学, 2011, 32(5): 878. WAN Cai-ling, LI Yu-shan, LIU Xue-wu, HU Bing-liang. Phase error correction in Fourier transform spectrometer based on phase correlation[J]. Journal of Applied Optics, 2011, 32(5): 878.

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