常规的视轴测试采用单台经纬仪读取俯仰绝对数值的定位方式, 探测器的线阵、视轴平行于整星坐标系+Y、+Z方向。区别于常规测试, 离轴相机视轴不再遵循探测器视轴与基准镜平行的原则, 并且整星坐标、立方镜坐标及视轴线阵三者是空间分离的, 因此提出了一种新的测试方法, 实验前需要将视轴调整到相机坐标系理论位置, 并且四色与五色线阵平行。借助于钻模支架, 利用经纬仪分别将相机视轴和整星坐标引出到相机立方镜a和钻模立方镜b, 通过立方镜坐标系的方向余弦矩阵, 将相机视轴引出到整星坐标。对视轴精度以及九谱段线阵多维定位进行分析, 给出实验采集的图像。结果表明, 视轴矩阵满足要求, 定位引出方法合理可行。

The conventional axis test adopted the position mode that uses a single theodolite to read the pitch absolute value. In this conventional axis test case, the line array and the axis of the detector are parallel to the +Y direction and +Z direction of the global coordinate system. The off-axis camera axis test, different from conventional axis test, did not follow the principle that the detector axis was parallel to the camera cube mirror. It is separated from the global coordinate system, the camera cube mirror coordinates and optical axis array. So a new axis test is proposed. It is need to adjust the optical axis to theory position of the camera coordinate system, and the four-colored line array should be parallel with five-colored line array before the experiment. With the aid of bracket, the camera axis was extract to camera cube mirror a and drilling cube mirror b using theodolite. Respectively, the direction cosine matrix was used to reduce error of camera axis. The accuracy and the multi-dimensional positioning of nine-band linear array were analyzed, and also the experiment image was obtained. The results show that the optical axis matrix meets the requirements and the location extraction method is reasonable and feasible.