A Generalized Sine Condition And Performance Comparison Of Wolter Type II And Wolter-Schwarzschild Extreme Ultraviolet Telescopes

Timo T. Saha

doi:10.1117/12.937965

3 November 1983 A Generalized Sine Condition And Performance Comparison Of Wolter Type II And Wolter-Schwarzschild Extreme Ultraviolet Telescopes

Timo T. Saha

Author Affiliations +

Proceedings Volume 0444, Advanced Technology Optical Telescopes II; (1983) https://doi.org/10.1117/12.937965
Event: 1983 Astronomy Conferences, 1983, London, United Kingdom

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.

Citation Download Citation

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); https://doi.org/10.1117/12.937965

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