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arXiv 1806.01591physics.app-ph
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通过选择性laser熔融制造轻质镜体的精密制造

Precision manufacturing of a lightweight mirror body made by selective laser melting

Enrico Hilpert, Johannes Hartung, Stefan Risse, Ramona Eberhardt, Andreas Tünnermann

备注：
13 pages, 19 figures, online version (corrected proof)
发表信息：
Precis. Eng. 53 (2018) 310-317
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摘要：

本文提出了一种通过增材制造生成光机械组件的新的个性化方法，嵌入到金属光学制造的既定工艺链中。增材技术提供的设计自由度使我们有机会生产出更轻的部件，同时提高机械稳定性。后者是通过模拟几种模型的金属镜具有恒定的外形，但不同的质量减少因素。与传统设计相比，优化的轻质反射镜表现出质量减少的$63.5 \%$和更高的刚度，但它不能通过切割技术制造。利用选择性激光熔化代替，所述拓扑非平凡设计的演示器由AlSi 12合金粉末制成。它进一步表明，-像在传统的制造镜基板的情况下-光学质量可以通过金刚石车削，化学镀镍，抛光技术，这最终导致在$< 150$ ~nm峰谷形状偏差和$< 1$ ~nm rms的粗糙度在$140 \times 110$ $μ$ m ${}^2$的测量区域中实现。增材制造的负面影响可以忽略不计。此外，它表明，在环境条件下，表面形状保持超过两年的存储期。

英文摘要：

This article presents a new and individual way to generate opto-mechanical components by Additive Manufacturing, embedded in an established process chain for the fabrication of metal optics. The freedom of design offered by additive techniques gives the opportunity to produce more lightweight parts with improved mechanical stability. The latter is demonstrated by simulations of several models of metal mirrors with a constant outer shape but varying mass reduction factors. The optimized lightweight mirror exhibits $63.5 \%$ of mass reduction and a higher stiffness compared to conventional designs, but it is not manufacturable by cutting techniques. Utilizing Selective Laser Melting instead, a demonstrator of the mentioned topological non-trivial design is manufactured out of AlSi12 alloy powder. It is further shown that -- like in case of a traditional manufactured mirror substrate -- optical quality can be achieved by diamond turning, electroless nickel plating, and polishing techniques, which finally results in $< 150$~nm peak-to-valley shape deviation and a roughness of $< 1$~nm rms in a measurement area of $140 \times 110$ $μ$m${}^2$. Negative implications from the additive manufacturing are shown to be negligible. Further it is shown that surface form is maintained over a two year storage period under ambient conditions.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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