Additive manufacturing of reflective optics: evaluating finishing methods
Additive manufacturing of reflective optics: evaluating finishing methods
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DOI：
10.1117/12.2289998
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发表时间：
2018-02
期刊：
影响因子：
--
通讯作者：
G. Leuteritz;Roland Lachmayer
中科院分区：
文献类型：
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作者：
G. Leuteritz;Roland Lachmayer
单独形状的光分布在照明技术中变得越来越重要，因此增材制造反射器的重要性显著增加。从汽车照明到医疗成像的广泛应用领域支持了这一说法。然而，即使采用优化的选择性激光熔化（SLM）工艺参数，增材制造的反射器表面也存在光学性能不足的问题。因此，为了进一步提高反射镜的光学质量，必须对反射镜进行后处理。这项工作集中在反射光学后处理程序的有效性。在已优化的铝反射镜的基础上，在SLM加工后对零件进行不同的加工。选择了激光抛光、溅射或喷砂等抛光方法，并对其效果进行了量化和比较。研究了后处理过程对表面粗糙度、反射率和几何精度的影响。对于每种精加工方法，将创建一个示范，并将其与完全研磨的样品进行比较。最后，制定了指导方针，以找出关于增材制造反射器的光学和几何特性的最佳处理方法。模拟的光分布将与开发的演示验证。
Individually shaped light distributions become more and more important in lighting technologies and thus the importance of additively manufactured reflectors increases significantly. The vast field of applications ranges from automotive lighting to medical imaging and bolsters the statement. However, the surfaces of additively manufactured reflectors suffer from insufficient optical properties even when manufactured using optimized process parameters for the Selective Laser Melting (SLM) process. Therefore post-process treatments of reflectors are necessary in order to further enhance their optical quality. This work concentrates on the effectiveness of post-process procedures for reflective optics. Based on already optimized aluminum reflectors, which are manufactured with a SLM machine, the parts are differently machined after the SLM process. Selected finishing methods like laser polishing, sputtering or sand blasting are applied and their effects quantified and compared. The post-process procedures are investigated on their impact on surface roughness and reflectance as well as geometrical precision. For each finishing method a demonstrator will be created and compared to a fully milled sample and among themselves. Ultimately, guidelines are developed in order to figure out the optimal treatment of additively manufactured reflectors regarding their optical and geometrical properties. Simulations of the light distributions will be validated with the developed demonstrators.