Additive manufacturing of glass for optical applications

SPIE LASE Pub Date : 2016-04-06 DOI:10.1117/12.2218137
Junjie Luo, L. Gilbert, D. Bristow, R. Landers, J. Goldstein, A. Urbas, E. Kinzel
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引用次数: 38

Abstract

Glasses including fused quartz have significant scientific and engineering applications including optics, communications, electronics, and hermetic seals. This paper investigates a filament fed process for Additive Manufacturing (AM) of fused quartz. Additive manufacturing has several potential benefits including increased design freedom, faster prototyping, and lower processing costs for small production volumes. However, current research in AM of glasses is limited and has focused on non-optical applications. Fused quartz is studied here because of its desirability for high-quality optics due to its high transmissivity and thermal stability. Fused quartz also has a higher working temperature than soda lime glass which poses a challenge for AM. In this work, fused quartz filaments are fed into a CO2 laser generated melt pool, smoothly depositing material onto the work piece. Single tracks are printed to explore the effects that different process parameters have on the morphology of printed fused quartz. A spectrometer is used to measure the thermal radiation incandescently emitted from the melt pool. Thin-walls are printed to study the effects of layer-to-layer height. Finally, a 3D fused quartz cube is printed using the newly acquired layer height and polished on each surface. The transmittance and index homogeneity of the polished cube are both measured. These results show that the filament fed process has the potential to print fused quartz with optical transparency and of index of refraction uniformity approaching bulk processed glass.
光学应用玻璃的增材制造
包括熔融石英在内的玻璃具有重要的科学和工程应用,包括光学,通信,电子和密封。研究了一种用于熔融石英增材制造(AM)的长丝进料工艺。增材制造有几个潜在的好处,包括增加设计自由度,更快的原型制作,以及降低小批量生产的加工成本。然而,目前对玻璃增材制造的研究是有限的,主要集中在非光学应用上。熔融石英由于其高透射率和热稳定性而成为高质量光学器件的理想选择。熔融石英还具有比钠石灰玻璃更高的工作温度,这对增材制造提出了挑战。在这项工作中,熔融石英细丝被送入二氧化碳激光产生的熔池,顺利地将材料沉积到工件上。通过单轨印刷,探索不同工艺参数对熔融石英印刷形貌的影响。光谱仪用于测量从熔池中发出的白炽热辐射。为了研究层间高度的影响,对薄壁进行了打印。最后,使用新获得的层高度打印3D熔融石英立方体,并在每个表面进行抛光。测量了抛光后立方体的透光率和折射率均匀性。这些结果表明,该工艺有可能打印出具有光学透明度和折射率均匀性接近大块加工玻璃的熔融石英。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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