论文部分内容阅读
为了更好地对大口径望远镜进行误差分析以及分配,引入了由美国30 m望远镜(TMT)团队所提出的标准化点源敏感性(PSSn),来进行大口径望远镜的各项误差及其之间的协调与分配。为了更好地利用PSSn进行误差分配,首先根据其定义对PSSn的基本性质进行了研究,论述了PSSn作为全频域评价指标的优越性,然后与传统的评价指标(波前均方根)进行了比较,重点分析了PSSn的合成特性以及合成误差的特点,之后利用Zernike多项式分析系统静态误差与PSSn的关系,得到了不同的Zernike系数与PSSn之间的关系。对于系统的动态载荷,利用功率谱结合光学传递函数的方法来研究系统的光学特性并对实际的大口径波前做出了仿真研究,得到系统的PSSn从0.996下降到0.991。所做的研究可以更好地理解大口径望远镜的误差特性,同时也可以帮助系统工程师对大口径望远镜的误差进行更好的分配。
In order to better analyze and allocate errors to large-aperture telescopes, the standardized point source sensitivity (PSSn) proposed by the US 30 m Telescope (TMT) team was introduced to carry out the errors of large-aperture telescopes and their Coordination and distribution. In order to make better use of PSSn for error assignment, the basic properties of PSSn are first studied according to its definition. The superiority of PSSn as the evaluation index in the whole frequency domain is discussed. Then the traditional PSSn (wavefront root mean square) After comparing the characteristics of PSSn and the synthetic errors, the relationship between the static error of PSSn and PSSn is analyzed by Zernike polynomial, then the relationship between different Zernike coefficients and PSSn is obtained. For the dynamic load of the system, the optical characteristics of the system were studied by using the power spectrum combined with the optical transfer function and the simulation of the actual large-diameter wave front was done. The PSSn of the system was reduced from 0.996 to 0.991. The research done can better understand the error characteristics of large-aperture telescopes and also help system engineers better distribute the errors of large-aperture telescopes.