光学学报, 2012, 32 (5): 0528002, 网络出版: 2012-04-16
新型超分辨干涉型光谱仪光谱定标研究
Study on Spectral Calibration of a Novel Interferometric Spectrometer with Supper-Resolution Capability
遥感 空间外差光谱技术 光谱定标 超光谱 半峰全宽 remate sensing spatial helerodyne spectroscopy spectral calibration hyper-spectral full width at half maxium
摘要
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。
Abstract
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.
施海亮, 方勇华, 吴军, 熊伟. 新型超分辨干涉型光谱仪光谱定标研究[J]. 光学学报, 2012, 32(5): 0528002. Shi Hailiang, Fang Yonghua, Wu Jun, Xiong Wei. Study on Spectral Calibration of a Novel Interferometric Spectrometer with Supper-Resolution Capability[J]. Acta Optica Sinica, 2012, 32(5): 0528002.