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5 October 2023 Optical performance of additive manufactured aluminum, aluminum metal matrix composite, and lightweighted aluminum alloy mirrors at cryogenic temperature
Ron Eng, John Casstevens, Alex Few, Christopher Hopkins, Tomasz M. Lis, Jaganathan Ranganathan, H. P. Stahl
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Proceedings Volume PC12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV; PC126770B (2023) https://doi.org/10.1117/12.2676844
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States
Abstract
Low cost, high performance lightweight Aluminum mirror provides an alternative to glass ceramic, ceramic, and exotic metal mirrors. NASA funded several lightweight Aluminum mirror technology development efforts for future space and balloon-borne infrared telescope programs. As part of these efforts, subscale Al-SiC metal matrix composite, Aluminum-6061 and Aluminum-5083 mirrors, and additive manufactured AlSi10Mg mirrors were evaluated at room temperature to 20 degrees Kelvin for its optical performance. This paper will discuss objectives, material properties, fabrication, cryogenic testing infrastructure and instrumentation, thermal test results, modelling effort compared to empirical data, and lessons learned.
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Ron Eng, John Casstevens, Alex Few, Christopher Hopkins, Tomasz M. Lis, Jaganathan Ranganathan, and H. P. Stahl "Optical performance of additive manufactured aluminum, aluminum metal matrix composite, and lightweighted aluminum alloy mirrors at cryogenic temperature", Proc. SPIE PC12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV, PC126770B (5 October 2023); https://doi.org/10.1117/12.2676844
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KEYWORDS
Aluminum
Optics manufacturing
Cryogenics
Additive manufacturing
Alloys
Aluminum mirrors
Composites
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