Folded path reflective telescope for SWAP limited imaging

James B. Johnson; Robert Martinez; Christopher D. Roll; Benjamin A. Cohen; Gary J. Swanson; Michael P. Chrisp

doi:10.1117/12.3013885

10 June 2024 Folded path reflective telescope for SWAP limited imaging

James B. Johnson, Robert Martinez, Christopher D. Roll, Benjamin A. Cohen, Gary J. Swanson, Michael P. Chrisp

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Proceedings Volume PC13042, Advanced Optics for Imaging Applications: UV through LWIR IX; PC1304202 (2024) https://doi.org/10.1117/12.3013885
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

MIT Lincoln Laboratory has designed and prototyped a series of all-reflective two mirror imaging telescopes offering long focal lengths within a small package volume. These designs take advantage of multiple reflections between the two surfaces to correct aberrations across the field and provide the path length necessary to place the image plane within a compact distance. These designs trade optical throughput, reduced by the large obscuration ratio, for volumetric and mass gains due to their extremely small size, making the form ideal for imaging bright objects in space constrained environments such as small satellites (SmallSats) and cube satellites. We show two different designs for the visible-NIR with 150mm apertures and >1m focal lengths that offer high image quality performance and flat fields across their fields of view. Prototype units were produced using diamond turning and results will be presented including imaging performance.

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Citation Download Citation

James B. Johnson, Robert Martinez, Christopher D. Roll, Benjamin A. Cohen, Gary J. Swanson, and Michael P. Chrisp "Folded path reflective telescope for SWAP limited imaging", Proc. SPIE PC13042, Advanced Optics for Imaging Applications: UV through LWIR IX, PC1304202 (10 June 2024); https://doi.org/10.1117/12.3013885

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KEYWORDS

Telescopes

Reflector telescopes

Prototyping

Satellites

Image quality

Mirror surfaces

Mirrors

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