中国科学院云南天文台机构知识库

建立一个两镜系统用于模拟拼接镜面中各子镜面的相对位姿关系。提出采用相邻子镜边缘安装边缘传感器和设置倾斜传感器相结合的方法对子镜倾斜（tip/tilt）及轴向平移（Piston）3个自由度进行检测的位姿检测方法。采用理论控制矩阵和实测控制矩阵进行主动校正实验,实验结果表明:理论控制矩阵校正时,边缘传感器均方根误差不大于7.4 nm,倾斜均方根误差不大于0.080″;实测控制矩阵校正时,边缘传感器均方根误差不大于7.3 nm,倾斜均方根误差不大于0.076″。研究结果可为环型拼接主动光学子镜间相对位置自由度探测不足的问题提供参考解决途径。

A two-mirror active optics system is established to simulate the relative pose relationship between the both segments. A pose detection method is proposed to detect the three Degrees of Freedom ( DOFs), tip /tilt and piston, of the active segment. It is a combinational method of two edge sensors and a laser-CCD based tilt sensor. The theoretical control matrix and the measured control matrix are used to carry out active calibration experiments. The experiment shows that the maximum Root Mean Square ( RMS) error of the edge sensors is about 7. 4 nm and the tilt about 0. 080″ when the theoretical control matrix is used. While the measured control matrix is used, the edge sensor's RMS error is about 7. 3 nm, and the tilt about 0. 076″. The research offers a potential solution to the problem of insufficient detection of the DOFs between the mirrors segmented in a ring.