Lightweight, aluminum, mirror design optimization for conventional and additive manufacturing processes

Jitsupa Paenoi; Cyril Bourgenot; Carolyn Atkins; Robert Snell; Iain Todd; Paul White; Kenneth Parkin; David Ryder; Richard Kotlewski; Scott McPhee; Krittapas Chanchaiworawit; Pearachad Chartsiriwattana; Auychai Laoyang; Teerawat Kuha; Apichat Leckngam; Christophe Buisset; Wiphu Rujopakarn; Saran Poshyachinda

doi:10.1117/12.2627757

29 August 2022 Lightweight, aluminum, mirror design optimization for conventional and additive manufacturing processes

Jitsupa Paenoi, Cyril Bourgenot, Carolyn Atkins, Robert Snell, Iain Todd, Paul White, Kenneth Parkin, David Ryder, Richard Kotlewski, Scott McPhee, Krittapas Chanchaiworawit, Pearachad Chartsiriwattana, Auychai Laoyang, Teerawat Kuha, Apichat Leckngam, Christophe Buisset, Wiphu Rujopakarn, Saran Poshyachinda

Author Affiliations +

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 121880U (2022) https://doi.org/10.1117/12.2627757
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Lightweight, aluminum, freeform prototype mirrors have been designed and fabricated by a Thai led team, with UK support, for intended applications within the Thai Space Consortium (TSC) satellite series. The project motivation was to explore the different design strategies and fabrication steps enabled by both conventional (mill, drill, and lathe) and additive (3D printing) manufacture of the prototype substrates. Single Point Diamond Turning was used to convert the substrates into mirrors and optical metrology was used to evaluate the different mirror surfaces. The prototype criteria originated from the TSC-1 satellite tertiary mirror, which is designed to minimize the effect of Seidel aberrations before the beam enters the hyperspectral imager. To converge upon the prototype designs, Finite Element Analysis (FEA) was used to evaluate the different physical conditions experienced by the prototypes during manufacture and how these influence the optical performance. The selected designs satisfied the mass and surface displacement criteria of the prototype and were adapted to either the conventional or additive manufacturing process. This paper will present the prototype design process, substrate manufacture, optical fabrication, and an interferometric evaluation of the optical surfaces comparing the conventional and additive manufacturing processes.

Conference Presentation

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Jitsupa Paenoi, Cyril Bourgenot, Carolyn Atkins, Robert Snell, Iain Todd, Paul White, Kenneth Parkin, David Ryder, Richard Kotlewski, Scott McPhee, Krittapas Chanchaiworawit, Pearachad Chartsiriwattana, Auychai Laoyang, Teerawat Kuha, Apichat Leckngam, Christophe Buisset, Wiphu Rujopakarn, and Saran Poshyachinda "Lightweight, aluminum, mirror design optimization for conventional and additive manufacturing processes", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 121880U (29 August 2022); https://doi.org/10.1117/12.2627757

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