Perkin-Elmer It turned out that Perkin-Elmer, which was probably the best optical manufacturer in America at that time, had built the primary mirror for this telescope.
结果事实是，当时美国最优秀的,光学部件制造商，为这个望远镜制造主镜。
This is the distance (usually in mm.) from the lens (or primary mirror) to the point where the telescope is in focus (focal point).
就是从透镜(或者主反射镜)到焦点的距离，通常单位是毫米(mm)。
The work on the technical transform of the mounting system of the primary mirror of the 1.2m alt-az telescope at the Yunnan Observatory is introduced and discussed in this paper.
本文介绍和讨论了云南天文台1.2米地平式望远镜主镜支承装置的技术改造工作。
应用推荐