Abstract
Grazing-incidence X-ray optics have revolutionized X-ray astrophysics. The
ability to concentrate flux to a tiny detection region provides a dramatic
reduction in background and a consequent very large improvement in sensitivity.
The X-ray optics also permit use of small-format, high-performance focal plane
detectors and, of course, especially for high-angular-resolution optics,
provide a wealth of imaging data from extended sources. This review, follows
the use of X-ray optics from the first rocket-borne instruments in the 1960s
through to the Observatories flying today and being developed for future use.
It also includes a brief overview of the challenges of fabricating X-ray optics
and the various technologies that have been used to date
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