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。 Aiming at the structural characteristics of the ultraviolet imager near the earth and the need of high-precision geometric calibration, a new method of geometric calibration based on UV collimator, high-precision theodolite and six-dimensional turntable is proposed. By constructing a new geometrical calibration device, the geometrical calibration of the VLR imager is realized. The results of geometric calibration show that the instrument is within 2 pixels of the theoretical height in the direction of the height of the edge and 25 pixels in the direction of the edge with the ideal. Uncertainty analysis shows that the geometrical calibration uncertainties of the instrument at the edge height and azimuth direction are 0.488 and 0.612 pixels, respectively, and both achieve sub-pixel accuracy. The new method and device for geometric calibration provide an important reference and realization platform for the subsequent installation and testing of the optical equipment of the same type of subsequent instruments.