Research on and Correction of Interference Fringes Phenomenon in Dispersive Hyperspectral Imaging Spectrometer Using Back-Illuminated CCDs in Near-Infrared Band
Research on and Correction of Interference Fringes Phenomenon in Dispersive Hyperspectral Imaging Spectrometer Using Back-Illuminated CCDs in Near-Infrared Band
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DOI：
10.3964/j.issn.1000-0593(2014)07-1995-05
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发表时间：
2014-07-01
影响因子：
0.7
通讯作者：
Huang Xiao-xian
中科院分区：
文献类型：
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作者：
Ma Liang;Wei Jun;Huang Xiao-xian
使用背光源的色散型高光谱成像光谱仪会在近红外波段产生干涉条纹，降低近红外光谱分辨率。为了解决这一问题，我们建立了类似于Farby-Perot干涉仪的多光束干涉模型，估算了700~900 nm范围内干涉条纹的强度分布，用测量数据验证了其正确性，并分析了CCD光敏区厚度与干涉现象的关系。在此基础上，采用改进的平场校正算法对干扰进行校正。从751年开始。83比1 010。04 nm波长，校正效率可达96。6%。结果表明，该算法能有效地消除近红外波段色散高光谱成像光谱仪的干扰。
Dispersive hyperspectral imaging spectrometer using back-illuminated CCDs will cause interference fringes in near-infrared band, reducing the near-infrared spectral resolution. To solve this problem, we established a multi-beam interference model similar to a Farby-Perot interferometer, estimated the intensity of distribution of interference fringes from 700 to 900 nm, verified its correctness with measured data, and analyzed the relationship between CCD photosensitive zone thickness and the interference phenomenon. On this base, the authors used the improved flat-field correction algorithm to correct the interference. From 751. 83 to 1 010. 04 nm wavelength, the correction efficiency can reach 96. 6%. The results show that the algorithm can effectively eliminate the interference of dispersive hyperspectral imaging spectrometer in near-infrared band.