CubeSpec: Optical payload design

Gert Raskin*, Jeroen de Maeyer, Bart Vandenbussche, Dominic Bowman, Jan Goris, Maarten Kempenaers, Jacob Pember, Pierre Royer, Job Schuermans, Andrew Tkachenko, Dirk Vandepitte, Wim De Munter, Jelle Lanting, Huges Sana

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


    CubeSpec is an ESA in-orbit-demonstration mission, based on a 6U CubeSat, targeting high-resolution astronomical spectroscopy. It is developed and funded in Belgium and scheduled for launch at the end of 2024. The CubeSpec payload consists of an off-axis Cassegrain telescope with a rectangular aperture (186x82mm2) and a prism cross-dispersed echelle spectrograph. The telescope aperture almost completely covers the surface area of 2 CubeSat units and the entire optical system fits in 4 units (10x20x20cm) of the spacecraft. CubeSpec delivers a spectral resolution of R=55000 and covers the wavelength range from 420 to 620 nm. Furthermore, it is equipped with a fine-guidance system based on a fast beam-steering mirror and a fine-guidance sensor that provide accurate centering of the source image on the spectrograph slit to compensate for spacecraft pointing jitter. In this contribution, we present the optical design of the CubeSpec payload.

    Original languageEnglish
    Title of host publicationSpace Telescopes and Instrumentation 2022
    Subtitle of host publicationOptical, Infrared, and Millimeter Wave
    EditorsLaura E. Coyle, Shuji Matsuura, Marshall D. Perrin
    Place of PublicationBellingham, Washington
    Number of pages8
    ISBN (Electronic)9781510653429
    ISBN (Print)9781510653412
    Publication statusPublished - 27 Aug 2022
    EventSpace Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave - Montreal, Canada
    Duration: 17 Jul 202222 Jul 2022

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X


    ConferenceSpace Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave


    • CubeSat
    • Optical design
    • Spectroscopy
    • Telescope


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