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针对新型超分辨空间外差光谱技术特点,研究了其相位误差形成机理,采用连续可调单色光计算仪器各波长实际相位,用频率定标方式获取理论相位,在频谱域进行卷积从而剔除相位误差。利用光谱仪实测的连续光源、大气CO2吸收干涉图进行相位误差校正实验,结果表明,该算法能够达到很好的空间外差光谱仪相位误差修正效果。
Aiming at the characteristics of the new super-resolution space heterodyne spectroscopy, the mechanism of phase error is studied. The continuous phase of the monochromatic light is used to calculate the actual phase of each wavelength of the instrument, the theoretical phase is obtained by frequency calibration and convolution is performed in the spectral domain to eliminate Phase error. The experimental results of phase error correction using continuous light source and atmospheric CO2 absorption interferometer measured by spectrometer show that this algorithm can achieve good effect of phase error correction of space heterodyne spectrometer.