11 May 2017 Progress on high-performance rapid prototype aluminum mirrors
Author Affiliations +
Near net shape parts can be produced using some very old processes (investment casting) and the relatively new direct metal laser sintering (DMLS) process. These processes have significant advantages for complex blank lightweighting and costs but are not inherently suited for producing high performance mirrors. The DMLS process can provide extremely complex lightweight structures but the high residual stresses left in the material results in unstable mirror figure retention. Although not to the extreme intricacy of DMLS, investment casting can also provide complex lightweight structures at considerably lower costs than DMLS and even conventional wrought mirror blanks but the less than 100% density for casting (and also DMLS) limits finishing quality. This paper will cover the progress that has been made to make both the DMLS and investment casting processes into viable near net shape blank options for high performance aluminum mirrors. Finish and figure results will be presented to show performance commensurate with existing conventional processes.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kenneth S. Woodard, Bruce H. Myrick, "Progress on high-performance rapid prototype aluminum mirrors", Proc. SPIE 10181, Advanced Optics for Defense Applications: UV through LWIR II, 101810T (11 May 2017); doi: 10.1117/12.2263319; https://doi.org/10.1117/12.2263319


Development of beryllium-mirror turning technology
Proceedings of SPIE (September 01 1991)
Diamond Machined Optics For Use At Visible Wavelengths
Proceedings of SPIE (December 11 1984)
Metal mirrors with excellent figure and roughness
Proceedings of SPIE (September 25 2008)
Diamond Machining Of Metal & Plastic Optics
Proceedings of SPIE (December 16 1976)
Diamond machining of high-purity aluminium alloys
Proceedings of SPIE (October 01 1990)

Back to Top