新型超分辨干涉型光谱仪光谱定标研究

针对综合光栅衍射与空间干涉与一体的新型空间外差光谱(SHS)技术开展了光谱定标技术研究。从SHS干涉机理入手,列举了SHS与传统超光谱仪器光谱定标的差异,开展了仪器线性函数、光谱分辨率和光谱范围等光谱特性数据的定标原理研究,设计可调谐激光积分球光谱定标法,并且针对超光谱数据特点探讨了谱峰定位等数据处理算法。利用上述光谱定标方法对CO2空间外差光谱仪样机开展了光谱定标实验,并利用镁元素灯进行了定标精度验证,结果表明该光谱定标方法能够满足SHS光谱定标要求,样机实测光谱定标数据与理论设计值吻合。

Study on Spectral Calibration of a Novel Interferometric Spectrometer with Supper-Resolution Capability

In connection with the new spatial heterodyne spectroscopy (SHS), integrated grating diffraction and space interference, a study on the spectral calibration technology is done. From interference mechanism of SHS, the spectral calibration difference between SHS and traditional dispersive spectrometer is analyzed, study on ILS, spectral resolution, bandwidth calibration principle and method of SHS is done, and spectral calibration method of tunable laser with integrating sphere is designed and calibration data processing algorithm according to hyper-spectral data features is explored. Finally, using the above method CO2 spatial heterodyne spectrometer is calibrated experimentally, and calibration accuracy is validated using magnesium lamp. The results show that spectral calibration method can meet the requirements of SHS spectral calibration, and are consistent with theoretical values of prototype.