secondary mirror

This paper presents some technological barriers in producing the new secondary mirror for Φ 2.16m telescope and introduces the methods which have been adopted to resolve these technical problems. The possibility that optical surface is produced smoothly by selecting suitable shape of tool is discussed.

介绍了Φ2.16m望远镜新副镜加工中的一些工艺难点及所采取的方法，定性分析了选择合适的工具形状，使镜面面形平滑过渡的可能性。

Consider the present processing technology and art, the design with spherical secondary mirror is beneficial to its manufacture and cost reduction. The design with free-form surfaces is compact and diffraction limited, but its manufacture cost is still high as things as are at the moment.

结合当前加工工艺进行分析比较，指出次镜为球面的方案，有利于加工，且成本低；自由曲面方案结构紧凑，成像质量达到衍射极限，但目前加工成本还比较高。

Under this condition, the stray light of a Cassegrain telescope comes from diffuse reflection of telescope tube wall, directly reflected light by a horseshoe mirror, diffuse reflection light by secondary mirror mount and is symmetrically distributed.

在这种条件下，卡塞格伦望远镜系统杂散光成对称分布，主要来源于望远镜筒壁的漫反射光、马蹄镜的直接反射光和次镜支架的漫反射光。

The secondary mirror must be adapted during the process of grinding and polishing to this other form.

副镜在磨制和抛光过程中必须与此新形状相适应。

Analysis of a Supporting System with a Stewart Platform for Telescope Secondary Mirror

基于六杆机构的望远镜副镜支承的分析

In the presence of the Seidal optical aberration theory, third order aberration caused by the main mirror and secondary mirror positions' errors were analyzed in detail.

借助于塞德尔像差理论，详细地分析了主光学系统的主次镜位置误差可能导致的三级像差。

The paper introduces the structure, lay-up, materials option, molding process and performance testing of carbon/ epoxy composite materials secondary mirror substrate.

文章介绍了碳/环氧复合材料两次表面镜基板的结构与铺层、选材与成型工艺，性能测试等内容。

Secondary key mirror field. This cell contains the most recently retrieved value for the secondary database key ( optional).

辅助关键字镜像字段。此单元格含有数据库辅助关键字（可选）的最近检索值。