地球临边紫外环形成像仪几何定标技术研究  

Research of Geometric Calibration of the Earth Annular Ultraviolet Limb Imager

作　　者：杨小虎[1] 王淑荣[1] 黄煜[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《中国激光》2014年第9期259-264,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(41074126);国家863计划(2009AA12Z151)

摘　　要：针对地球临边紫外环形成像仪的结构特点及高精度几何定标的需要,提出了一种基于紫外平行光管、高精度经纬仪及六维转台等设备进行的几何定标新方法。通过构建相应的几何定标新装置,实现了地球临边紫外环形成像仪超大临边视场的几何定标。几何定标结果显示,仪器在临边高度方向与理论设计符合程度在2pixel以内,而在临边方位方向与理想情况偏差最大为25pixel。不确定度分析表明,仪器在临边高度和方位方向上的几何定标不确定度分别为0.488pixel和0.612pixel,均达到亚像素级精度。几何定标新方法及装置对后续同类型仪器的前期光机装调及检测提供了重要参考和实现平台。Considering the design feature and requirement in high precision of geometric calibration of the earth annular ultraviolet（UV）limb imager,a new method based on UV collimator,high precision theodolite and six-dimension rotator is proposed.Geometric calibration is done as soon as the new device is built-up.The result shows an agreement of 2 pixel or less with the theoretical design in limb altitude and a biggest deviation of 25 pixel in limb azimuth orientation.The combined standard uncertainty analysis indicates a 0.488 pixel and a 0.612 pixel uncertainty in limb altitude and azimuth orientation respectively,both reaching sub-pixel precision.With the successful accomplishment of the geometric calibration,the method and the device offer an important reference and a realized platform for the pre-optic-mechanical installing and measuring of the similar type of instrument.

关 键 词：几何光学 紫外环形成像仪 几何定标 临边高度方向 临边方位方向 不确定度 

分 类 号：TP706[自动化与计算机技术—检测技术与自动化装置]