大空间尺度可控科学反射镜能动光学技术研究

为了保证光束在极大口径天文望远镜中具备高精度波前质量、高精度中继变换，以满足极大口径天文望远镜技术发展需求，对大空间尺度可控科学反射镜和能动光学进行了相关关键技术研究。大空间尺度平面镜面形精度评价、波前整体中继变换原理与误差传递、波前整体中继变换集成控制方法均为极大口径天文望远镜技术发展中所急需解决的关键技术问题。依托三十米望远镜（TMT）三镜系统(GSSM)，以该3.594m×2.536m×0.1m（长轴×短轴×厚）的椭圆形平面镜系统作为研究对象，并以该系统的原理样机为实验平台，开展基于功率谱拼接技术的大空间尺度平面镜面形精度评价、基于多体系统运动学及结构函数的波前整体中继变换原理与误差传递、基于LuGre摩擦模型的波前整体中继变换集成控制方法等三方面的理论研究和应用研究，解决大空间尺度可控科学反射镜所面临的科学问题，掌握极大口径天文望远镜研制的关键技术，服务于国家将来的天文大科学工程。

The research on giant steerable science mirror with adaptive optics is to meet the technology development of very large aperture telescope and ensure the beam of light could relay with high accuracy of wavefront and steering. There are some key techonology needed to be solved in the development of very large aperture telescope including the evaluation of mirror surface accuracy, the optical ralay principle and error transform, the integrated control of wavefront. The research could rely on the project of Giant Steerable Science Mirror (GSSM) of Thirty Meter Telescope (TMT). It's the tertiary mirror of TMT and with the elliptical shape of 3.594 meter × 2.536 meter × 0.1 meter (long axis × short axis × thickness). With the platform and the prototype of the GSSM, we could develop the technology of evaluation of accuracy of large aperture flat mirror surface based on power spectrum density (PSD) stitching, theory and algorithm of optical relay and error transfer based on multi-object kinematic and structure function, the integrated control based on friction model of LuGre, during the research with theory analysis and experiments. In order to dominate the key technology of the very large aperture telescope, the project of adaptive optics for GSSM is expect to be done as the contribution to the large project of national astronomy.