Technologies for producing segments for extremely large telescopes
Technologies for producing segments for extremely large telescopes
复制标题
超大型望远镜部件的生产技术
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
G. Yu
中科院分区：
文献类型：
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作者：
D. Walker;C. Atkins;I. Baker;R. Evans;S. Hamidi;P. Harris;H. Li;W. Messelink;J. Mitchell;M. Parry;P. Rees;G. Yu
我们描述了一种新的工艺链上的进展，用于生产8个1.4米的六边形段作为原型的欧洲极大望远镜-一个主球面段作为参考，和7个非球面段。一个新的试验工厂集成了一个由Optic Glyndwr设计和建造的定制全孔径测试塔，以及一台Zeeko 1.6米抛光机。工艺链从在克兰菲尔德BoX™磨床上对六边形段进行非球面化开始，然后使用Zeeko CNC平台进行平滑、校正抛光和边缘矫正。本文介绍了技术和进展，并预计如何通过七个部分的过程链预计将演变，以提高加工速度和表面质量。
We describe progress on a novel process-chain being used to produce eight 1.4m hexagonal segments as prototypes for the European Extremely Large Telescope - a Master Spherical Segment as a reference, and seven aspheric segments. A new pilot plant integrates a bespoke full-aperture test-tower designed and built by OpTIC Glyndwr, with a Zeeko 1.6m polishing machine. The process chain starts with aspherising hexagonal segments on the Cranfield BoX™ grinder, followed by smoothing, corrective-polishing and edge-rectification using the Zeeko CNC platform. The paper describes the technology and progress, and anticipates how the process-chain is expected to evolve through the seven segments to increase both process-speed and surface-quality.