超光譜空間外差干涉儀探測(cè)器響應(yīng)誤差校正
發(fā)布時(shí)間：2019-04-16 14:09
【摘要】：應(yīng)用于大氣CO2高精度探測(cè)的超光譜分辨率空間外差光譜儀,采用面陣探測(cè)器同時(shí)采集二維干涉數(shù)據(jù)。針對(duì)面陣探測(cè)器響應(yīng)同時(shí)存在的非均勻性和非線性,分別分析了其對(duì)干涉數(shù)據(jù)及復(fù)原光譜的影響,指出在相同的探測(cè)器非均勻性噪聲下,光譜分辨率越高復(fù)原光譜噪聲越大;而非線性不但對(duì)有效光譜范圍內(nèi)光譜復(fù)原精度有影響,還會(huì)產(chǎn)生光譜截止頻率外的非零值。闡述了一種多能量等級(jí)均勻輻射源的非線性及單一均勻輻射源非均勻性同時(shí)校正算法。開(kāi)展了探測(cè)器響應(yīng)校正實(shí)驗(yàn)。探測(cè)器數(shù)據(jù)校正后非均勻性從4.04%降至0.14%;干涉數(shù)據(jù)校正后復(fù)原的光譜平滑,大大降低了非均勻噪聲,校正后光譜截止頻率之外數(shù)據(jù)基本為零,去除了非線性影響。
[Abstract]:A hyperspectral resolution spatial heterodyne spectrometer for high-precision detection of atmospheric CO2 is used to collect two-dimensional interferometric data simultaneously with a plane array detector. In view of the non-uniformity and nonlinearity of the response of the array detector, the influence on the interferometric data and the restored spectrum is analyzed respectively. It is pointed out that the higher the spectral resolution is, the greater the restored spectral noise is under the same non-uniform noise of the detector. The nonlinearity not only affects the spectral restoration accuracy in the effective spectral range, but also produces a non-zero value outside the spectral cutoff frequency. In this paper, an algorithm for simultaneous correction of non-uniformity and non-uniformity of a single uniform radiation source with multiple energy levels is presented. The detector response correction experiment is carried out. After correction, the non-uniformity of detector data decreases from 4.04% to 0.14%, and the spectral smoothing after correction of interferometric data greatly reduces the non-uniform noise, and the data outside the spectral cut-off frequency after correction is basically zero and the nonlinear effect is eliminated.
【作者單位】： 中國(guó)科學(xué)院安徽光學(xué)精密機(jī)械研究所中國(guó)科學(xué)院通用光學(xué)定標(biāo)與表征技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(41301373)
【分類號(hào)】：TH744.3
[Abstract]:A hyperspectral resolution spatial heterodyne spectrometer for high-precision detection of atmospheric CO2 is used to collect two-dimensional interferometric data simultaneously with a plane array detector. In view of the non-uniformity and nonlinearity of the response of the array detector, the influence on the interferometric data and the restored spectrum is analyzed respectively. It is pointed out that the higher the spectral resolution is, the greater the restored spectral noise is under the same non-uniform noise of the detector. The nonlinearity not only affects the spectral restoration accuracy in the effective spectral range, but also produces a non-zero value outside the spectral cutoff frequency. In this paper, an algorithm for simultaneous correction of non-uniformity and non-uniformity of a single uniform radiation source with multiple energy levels is presented. The detector response correction experiment is carried out. After correction, the non-uniformity of detector data decreases from 4.04% to 0.14%, and the spectral smoothing after correction of interferometric data greatly reduces the non-uniform noise, and the data outside the spectral cut-off frequency after correction is basically zero and the nonlinear effect is eliminated.
【作者單位】： 中國(guó)科學(xué)院安徽光學(xué)精密機(jī)械研究所中國(guó)科學(xué)院通用光學(xué)定標(biāo)與表征技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(41301373)
【分類號(hào)】：TH744.3
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