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Practical, corrected Kirkpatrick-Baez telescope for x-ray astronomy.

Dana Longcope, Loren Acton, Charles Kankelborg

    Applied Optics
    |September 11, 2019
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    Summary

    A corrected Kirkpatrick-Baez (K-B) optic design significantly reduces aberrations for soft x-ray imaging. This low-cost K-B telescope offers improved resolution for space-based astronomical observations.

    Area of Science:

    • X-ray astronomy
    • Optical physics
    • Telescope design

    Background:

    • Kirkpatrick-Baez (K-B) optics provide a cost-effective alternative to Wolter designs for soft x-ray imaging.
    • Traditional K-B telescopes suffer from significant aberrations due to mirror interactions.
    • Low-cost K-B systems are desirable for long-duration orbital observations of cosmic x-ray sources.

    Purpose of the Study:

    • To demonstrate a corrected Kirkpatrick-Baez prescription with significantly reduced aberrations.
    • To explore a novel construction method for K-B optics using deformable glass slats.
    • To achieve improved resolution and effective area for x-ray astronomy applications.

    Main Methods:

    • Developed a corrected Kirkpatrick-Baez optical prescription.

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  • Investigated the feasibility of constructing K-B optics by deforming flat glass slats in precision grooves.
  • Quantified aberration reduction compared to classic K-B designs.

    • Main Results:

    • Achieved an order-of-magnitude reduction in aberrations with the corrected K-B prescription.
    • Demonstrated that deformed glass slats can approximate optimal figures for K-B optics.
    • The novel construction method yields focusing performance superior to the best classic K-B telescopes.

    Conclusions:

    • The corrected K-B prescription offers a viable path to high-performance, low-cost x-ray optics.
    • Deformable glass slats provide a simplified and effective method for fabricating K-B systems.
    • This approach significantly advances the potential for achieving useful resolution and high effective area in x-ray astronomy.