温度对某机载成像光谱仪谱线漂移的影响

发布时间：2018-06-18 18:01

  本文选题：遥感 + 谱线漂移　； 参考：《光学学报》2015年04期

【摘要】：为了研究温度对机载成像光谱仪谱线漂移的影响,分析了机载环境下仪器温度载荷的特点、作用机理和表现形式,研究了光谱仪的谱线漂移特性。根据机载环境下温度载荷特点,利用有限元法,结合最小二乘法和坐标转换法,计算了光学系统各镜面在温度载荷作用下面形变化和刚体位移。对变形后的光学系统进行了光线追迹,研究了其谱线漂移特性。通过热光学实验和飞行成像期间光谱定标实验验证了理论分析。热光学实验表明,在±10℃温度变化范围内,谱线在光谱方向仅发生整体平移,没有拉伸或压缩效应。在飞行期间的定标实验中,其平均谱线偏移量为0.248 nm,满足定标精度的1/3(定标精度为1 nm)要求。后续成像不需要再进行光谱定标或光谱修正。
[Abstract]:In order to study the effect of temperature on spectral line drift of airborne imaging spectrometer, the characteristics, mechanism and form of temperature load of airborne imaging spectrometer are analyzed, and the characteristics of spectral line drift in airborne imaging spectrometer are studied. According to the characteristics of temperature load in airborne environment, the shape change and rigid body displacement under temperature load are calculated by means of finite element method, least square method and coordinate transformation method. The ray tracing of the deformed optical system is carried out, and the characteristics of spectral line drift are studied. The theoretical analysis is verified by thermal optical experiments and spectral calibration experiments during flight imaging. The thermal optical experiments show that in the temperature range of 卤10 鈩，

本文编号：2036389