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Alvarez varifocal X-ray lens

Author

Listed:
  • Vishal Dhamgaye

    (Harwell Science and Innovation Campus
    Raja Ramanna Centre for Advanced Technology)

  • David Laundy

    (Harwell Science and Innovation Campus)

  • Hossein Khosroabadi

    (Harwell Science and Innovation Campus)

  • Thomas Moxham

    (Harwell Science and Innovation Campus
    University of Oxford, Parks Road)

  • Sara Baldock

    (Lancaster University)

  • Oliver Fox

    (Harwell Science and Innovation Campus)

  • Kawal Sawhney

    (Harwell Science and Innovation Campus)

Abstract

Visible light optical elements such as lenses and mirrors have counterparts for X-rays. In the visible regime, a variable focusing power can be achieved by an Alvarez lens which consists of a pair of inline planar refractors with a cubic thickness profile. When the two refractors are laterally displaced in opposite directions, the parabolic component of the wavefront is changed resulting in a longitudinal displacement of the focus. This paper reports an implementation of this concept for X-rays using two planar microfabricated refractive elements. The Alvarez X-ray lens can vary the focal distance of an elliptical X-ray mirror or a planar compound X-ray lens over several millimetres. The study presents the first demonstration of an Alvarez X-ray lens which adaptively corrects defocus and astigmatism aberrations of X-ray optics. In addition, the Alvarez X-ray lens eliminates coma aberration in an elliptical mirror, to the lowest order, when combining the lens with an adjustment of the pitch angle of the mirror.

Suggested Citation

  • Vishal Dhamgaye & David Laundy & Hossein Khosroabadi & Thomas Moxham & Sara Baldock & Oliver Fox & Kawal Sawhney, 2023. "Alvarez varifocal X-ray lens," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40347-1
    DOI: 10.1038/s41467-023-40347-1
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