The production of metal mirrors for use in astronomy
The production of metal mirrors for use in astronomy
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天文学用金属镜的生产
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
D. Brooks
中科院分区：
文献类型：
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作者：
D. Brooks
这篇论文证明了用镀镍铝制造更大反射镜的可能性，与零膨胀玻璃陶瓷或硼硅酸盐相比，它具有相当大的成本和风险效益。用铝制造大型镜子可以将生产成本降低三分之一。新一代超大望远镜正在设计中，直径约为100米。建议的设计是镶嵌式反射镜类似凯克望远镜的主要。所需的大量玻璃抑制了建筑，仅仅是因为它的成本和生产时间。很少有人研究大型金属镜的生产过程。然而，记录了热效率和潜在的改进的镜视益处。空间望远镜和光学电信也可受益于金属镜的应用。这里介绍的是最终导致比尔望远镜重生的过程和结果。主要介绍了1.83米直径1.4吨铝主镜的材料选择和制造工艺。所开发的铝镜技术也被应用于非球面薄弯月面变形镜的构造。描述了在其生产中使用的方法。记录了先进的计算机控制抛光方法，用于生产双子望远镜双曲次镜的三分之一比例模型。这些都是使用主动抛光研磨。
This thesis demonstrates the possibility of manufacturing larger mirrors from nickel coated aluminium with a considerable cost and risk benefits compared to zero expansion glass ceramic or borosilicate. Constructing large mirrors from aluminium could cut the cost of production by one third. A new generation of very large telescopes is being designed, on the order of 100 meters diameter. The proposed designs are of mosaic type mirrors similar to the Keck Telescope primary. The enormous mass of glass required inhibits the construction, simply by its cost and production time. Very little research has been done on the processes involved in the production of large metal mirrors. However the thermal efficiency and potential improved mirror seeing benefits are documented. Space telescopes and optical telecommunications could also benefit with the application of metal mirrors. Presented here are the processes and results that culminated in the rebirth of the Birr Telescope. The main section concerns the material selection and processes in the construction of a 1.83 meter diameter 1.4 tonne aluminium primary mirror. The aluminium mirror technology developed was also applied to the construction of an aspheric thin meniscus deformable mirror. Methods employed in its production are described. Documented are the advanced computer controlled polishing methods employed in producing a one third scale model of the hyperbolic secondary mirror for the Gemini Telescopes. These were developed using an active polishing lap.