An additive manufactured CubeSat mirror incorporating a novel circular lattice

Robert Snell,Carolyn Atkins,Hermine Schnetler,Iain Todd,Everth Hernandez-Nava,Alistair Lyle,George Maddison,Katherine Morris,Christopher J. Miller,Melanie Roulet,Emmanuel Hugot, Fabio Tenegi Sanginés, A. Vega-Moreno, L. T. G. van de Vorst, Joris Dufils,Leon Brouwers,Szigfrid Farkas,György Mező, Mat Beardsley,Michael Harris

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV（2020）

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Abstract

Additive Manufacturing (AM; 3D printing) for mirror fabrication allows for intricate designs that can combine lightweight structures and integrated mounting. Conventional lightweight structures utilise cubic or prismatic unit cells, which do not provide uniform support at the edge of curved mirrors. We present a new circular lattice based upon cylindrical coordinates and how this lattice has been incorporated within an 80 mm diameter mirror intended for use in a 3U CubeSat telescope. Several design iterations are explored, which include prototype mirrors produced in a titanium alloy and a finite element analysis of the one of the design iterations.

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Key words

Additive manufacturing, 3D printing, lightweight mirrors, metal mirrors, CubeSat, finite element analysis, lightweight structures, lattice

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