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EUV telescope for a Cubesat nanosatellite.

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    This study details a compact extreme ultraviolet telescope designed for solar corona observation at 17.14 nm. It features a Ritchey-Chrétien design with advanced multilayer coatings for high-resolution solar imaging.

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    Area of Science:

    • Solar Physics
    • Astronomy
    • Optical Engineering

    Background:

    • The solar corona's study requires specialized instruments for extreme ultraviolet (EUV) observation.
    • Compact and high-resolution telescopes are crucial for in-situ or space-based solar research.

    Purpose of the Study:

    • To describe the design and performance of a compact 2U-format telescope for solar corona studies.
    • To detail the optical parameters, coatings, and metrology techniques employed.

    Main Methods:

    • Utilized a Ritchey-Chrétien optical design for the telescope objective.
    • Employed reflective multilayer Aluminum/Beryllium (Al/Be) coatings with specific reflectance and bandwidth.
    • Applied an interferometric technique for substrate control and optical system alignment.

    Main Results:

    • Achieved a compact 2U form factor suitable for space applications.
    • The telescope operates at 17.14 nm with a 2x2 degree field of view and 11 arcsecond angular resolution.
    • Demonstrated effective use of Al/Be multilayer coatings and interferometric metrology.

    Conclusions:

    • The developed telescope is a capable instrument for EUV solar corona observation.
    • The described design and metrology are suitable for creating advanced solar observation systems.