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Related Experiment Video

Updated: Jul 15, 2026

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

Published on: October 27, 2017

Efficient Fresnel x-ray optics made simple.

Christoph Braig¹, Peter Predehl

¹Max-Plank-Institut für Extraterrestrische Physik, Germany. cbraig@mpe.mpg.de

|April 21, 2007

Summary

A new spaceborne X-ray telescope design uses Fresnel lenses for ultrahigh angular resolution. This cost-effective approach enhances instrumental sensitivity and astronomical capabilities for future space missions.

Area of Science:

Astronomy and Astrophysics
Optical Engineering
Space Science

Background:

Upcoming spaceborne X-ray telescopes require ultrahigh angular resolution.
Existing designs may face challenges with cost and complexity.

Purpose of the Study:

To propose a practical, cost-effective design for spaceborne X-ray telescopes.
To optimize optical arrangements for enhanced sensitivity and resolution.

Main Methods:

Utilizing dispersion-corrected Fresnel lenses.
Analyzing the radial transmission profile of a diffractive-refractive aperture.
Evaluating performance for energies above 4 keV.

Main Results:

An optimized lens arrangement was identified for improved instrumental sensitivity.

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The optical Gamow peak's dependence on aperture transmission was demonstrated.

Feasibility for large-scale compact and segmented objectives was shown.

Conclusions:

The proposed design offers a practical solution for high-resolution X-ray astronomy.
Conventional semiconductor detectors are well-suited for the proposed achromatic lenses.
Fabrication constraints using materials like Lithium, Beryllium, and plastics were discussed.