Upgrade plans for the Subaru AO system
Upgrade plans for the Subaru AO system
复制标题
斯巴鲁AO系统升级计划
DOI：
10.1117/12.459679
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
M. Iye
中科院分区：
文献类型：
--
作者：
Y. Hayano;H. Takami;W. Gaessler;N. Takato;M. Goto;Y. Kamata;Y. Minowa;N. Kobayashi;M. Iye
一个36单元的曲率自适应光学（AO）系统已经在斯巴鲁望远镜上运行了大约一年半。我们在K波段实现了0.3的Strehl比，这比我们预期的要小。同时，我们正在调查之间的差异获得的性能和模拟性能的当前AO系统，我们也正在改善目前的AO系统的Strehl性能和观测效率。与此同时，我们已经开始计划下一代斯巴鲁AO系统。本文提出了两个主要的升级。一种是尽可能多地增加子孔径的数量。实际上，子孔径的数量在100到200之间。子孔径的大小变为当前系统的子孔径的一半到三分之一，并且我们预期K波段Strehl比将提高到0.6以上。高阶曲率AO系统的第一盏灯计划于2004年发射。另一个升级计划是使用激光制导星星（LGS）。在钠层投射单个LGS，输出功率为4 W。激光系统、光束中继系统、激光发射望远镜和控制系统的概念设计已经开始。斯巴鲁望远镜发射激光的首次试验将于2005年进行。
A 36-elements curvature adaptive optics (AO) system has been operating on the Subaru telescope for about one and a half year. We achieved a Strehl ratio of 0.3 in the K-band, which is a rather smaller value than we expected. While we are investigating the discrepancy between the obtained performance and the simulated performance of the current AO system and we are also improving the current AO system in terms of the Strehl performance and the observing efficiency. Meanwhile we have started to plan a next generation of Subaru AO system. Two major upgrades are proposed in this paper. One is to increase the number of subapertures as much as possible. Practically, the number of subapertures lies between 100 and 200. The size of subaperture becomes half to one-third of that of the current system and we expected that the K-band Strehl ratio will improve to more than 0.6. The first light of the higher order curvature AO system is scheduled for 2004. Another upgrade plan is to use a laser guide star (LGS). A single LGS is projected at the sodium layer with an output power of 4 W. Conceptual designs for the laser system, beam relay system, laser launching telescope and control system have begun. The first test of launching laser from Subaru telescope will be in 2005.