Research for surface characteristics of aluminum mirrors made by laser additive manufacturing

Xiao Han; Nan Kang; Jianchao Jiao; Chao Wang

doi:10.1117/12.2548108

18 December 2019 Research for surface characteristics of aluminum mirrors made by laser additive manufacturing

Xiao Han, Nan Kang, Jianchao Jiao, Chao Wang

Proceedings Volume 11333, AOPC 2019: Advanced Laser Materials and Laser Technology; 113331I (2019) https://doi.org/10.1117/12.2548108
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

Additive manufacturing (AM) enable new and innovative design forms that cannot be produced by conventional manufacturing methods. Space optical instruments are precision systems that require high resolution, light weight, low cost and short schedule. Metal AM technology is more adept to the fabrication of mirror blanks and support structures with complex shapes. In this study, selective laser melting (SLM) technology were utilized to create workpieces. The AlSi10Mg mirror blanks were fabricated with metallic powder bed fusion. After forming, post annealing process at 300 ℃ for 2 h was performed to relieve internal stresses. The microstructure of AlSi10Mg produced by SLM is compact, and the mechanical properties are much higher than the alloy formed by conventional casting. The single point diamond turning (SPDT) was been applied to deliver optical quality mirror. The surface characteristics of AM components have been measured. The turning surface meets the 8~11nm RMS and 1.05λ PV. This research can be used for the manufacturing of lightweight space optical mirrors and improve overall process efficiency.

Citation Download Citation

Xiao Han, Nan Kang, Jianchao Jiao, and Chao Wang "Research for surface characteristics of aluminum mirrors made by laser additive manufacturing", Proc. SPIE 11333, AOPC 2019: Advanced Laser Materials and Laser Technology, 113331I (18 December 2019); https://doi.org/10.1117/12.2548108

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KEYWORDS

Mirrors

Aluminum

Additive manufacturing

Spatial light modulators

Optics manufacturing

Photomicroscopy

Space mirrors

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