Active Optics in LAMOST
Active Optics in LAMOST
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DOI：
10.1088/1009-9271/4/1/1
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发表时间：
2004-01
期刊：
影响因子：
--
通讯作者：
D. Su;X. Cui
中科院分区：
文献类型：
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作者：
D. Su;X. Cui
大空域多目标光纤光谱望远镜（LAMOST）是中国正在建设的重大国家工程之一。主动光学是新型大型望远镜的重要技术之一。它用于校正由引力和热变化引起的望远镜误差。然而，在这里，我们使用该技术来实现LAMOST的配置，这是一项传统方式无法完成的任务。本文还对LAMOST中使用的主动光学进行了全面而深入的研究，包括一种开环控制方法和一种辅助闭环控制方法。另一个重要的发展是开环控制的预校准方法，它具有一些新的特点：力致动器和位移致动器的力和位移同时计算；镜面轮廓可以任意设置；镜面形状不是用拟合多项式来表示，而是由镜面形状公式推导而来，具有较高的精度；证明了预标定方法的解与最小二乘解相同。
Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) is one of the major national projects under construction in China. Active optics is one of the most important technologies for new large telescopes. It is used for correcting telescope errors generated by gravitational and thermal changes. Here, however, we use this technology to realize the configuration of LAMOST,—a task that cannot be done in the traditional way. A comprehensive and intensive research on the active optics used in LAMOST is also reported, including an open-loop control method and an auxiliary closed-loop control method. Another important development is in our pre-calibration method of open-loop control, which is with some new features: simultaneous calculation of the forces and displacements of force actuators and displacement actuators; the profile of mirror can be arbitrary; the mirror surface shape is not expressed by a fitting polynomial, but is derived from the mirror surface shape formula which is highly accurate; a proof is given that the solution of the pre-calibration method is the same as the least squares solution.