Compact freeform 3 mirrors telescope for CubeSat within an additively manufactured housing (Conference Presentation)

Cyril J. Bourgenot; Joel Coukham; David G. Bramall; Paul A. White; Christopher J. Graham; Daniel Tomlinson; Hongchang Wang; Riley Shurvinton; Paresh C. Pradhan; Weichen Gu; Arindam Majhi; Kawal Sawhney; Abdul M. Haque

doi:10.1117/12.3020101

26 August 2024 Compact freeform 3 mirrors telescope for CubeSat within an additively manufactured housing (Conference Presentation)

Cyril J. Bourgenot, Joel Coukham, David G. Bramall, Paul A. White, Christopher J. Graham, Daniel Tomlinson, Hongchang Wang, Riley Shurvinton, Paresh C. Pradhan, Weichen Gu, Arindam Majhi, Kawal Sawhney, Abdul M. Haque

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131001J (2024) https://doi.org/10.1117/12.3020101
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

This paper reports on a nested freeform Three Mirror Anastigmat (TMA) telescope designed for a 3U CubeSat, achieving a compact 1.5U form factor with a focal length of 500mm, F/4.6. Capable of near-diffraction-limited performance in a 0.37°x0.42° field of view, it provides 5m Ground Sampling Resolution in Low Earth Orbit. The paper explores two housing options: one for additive manufacturing (AM) and the other for conventional machining (CM), aiming to determine the optimal approach for creating an AM-based optical system housing suitable for space. The AM option offers lightweighting opportunities and enhanced structural integrity. The mirrors, manufactured in RSA 443 with Nickel Phosphorus plating, alongside the AM material, AlSi40, are discussed for their homogeneous coefficient of thermal expansion crucial for orbital conditions. The paper reports on the AM process, system metrology, and high precision finishing through Ion Beam Figuring.

Conference Presentation

Citation Download Citation

Cyril J. Bourgenot, Joel Coukham, David G. Bramall, Paul A. White, Christopher J. Graham, Daniel Tomlinson, Hongchang Wang, Riley Shurvinton, Paresh C. Pradhan, Weichen Gu, Arindam Majhi, Kawal Sawhney, and Abdul M. Haque "Compact freeform 3 mirrors telescope for CubeSat within an additively manufactured housing (Conference Presentation)", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131001J (26 August 2024); https://doi.org/10.1117/12.3020101

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