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X-Ray Optics and Instrumentation
Table of Contents
Special Issues
X-Ray Optics and Instrumentation
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2010
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Article
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Fig 10
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Review Article
Diffractive X-Ray Telescopes
Figure 10
It has long been known that chromatic aberration is minimized by adopting a long focal length. Before the invention of the achromatic lens Hevelius built telescopes with 60 and (shown here) 140 foot focal lengths [
53
].