Equal-curvature grazing-incidence x-ray telescopes

Details Equal-curvature grazing-incidence x-ray telescopes Equal-curvature grazing-incidence x-ray telescopes

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apopt..42.4599s&link_type=abstract

Applied Optics, Volume 42, Issue 22, pp. 4599-4605 (2003).

Physics

Optics

2

Astronomical Telescopes, X-Ray Spectrometers, Ray Tracing, Curvature Measurement, Angular Measurement, Optical Elements

Scientific paper

We introduce a new type of x-ray telescope design, an equal-curvature telescope. We simply add a second-order axial sag to the base grazing-incidence cone-cone telescope. The radius of curvature of the sag terms is the same on the primary surface and on the secondary surface. The design is optimized such that the on-axis image spot at the focal plane is minimized. The on-axis rms spot diameter of two telescopes that we studied is less than 0.2 arc sec. The off-axis performance is comparable with that of equivalent Wolter type 1 telescopes.

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