3 November 1983 A Generalized Sine Condition And Performance Comparison Of Wolter Type II And Wolter-Schwarzschild Extreme Ultraviolet Telescopes
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Abstract
An equation similar to the Abbe sine condition is derived for a Wolter type II telescope. This equation and the sine condition are then combined to produce a so called generalized sine condition. Using the law of reflection, Fermat's principle, the generalized sine condition, and simple geometry the surface equations for a Wolter type II telescope and an equivalent Wolter-Schwarzschild telescope are calculated. The performances of the telescopes are compared in terms of rms blur circle radius at the gaussian focal plane and at best focus.
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Timo T. Saha, Timo T. Saha, "A Generalized Sine Condition And Performance Comparison Of Wolter Type II And Wolter-Schwarzschild Extreme Ultraviolet Telescopes", Proc. SPIE 0444, Advanced Technology Optical Telescopes II, (3 November 1983); doi: 10.1117/12.937965; https://doi.org/10.1117/12.937965
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