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Proceedings Paper

Formula For The RMS Blur Circle Radius Of Wolter Telescopes Based On Aberration Theory
Author(s): David L. Shealy; Timo T. Saha
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Paper Abstract

A formula for the RMS blur circle radius of Wolter telescopes has been derived using the transverse ray aberration expressions of Saha. The resulting formula for the RMS blur circle radius over an image plane and a formula for the surface of best focus are based on third, fifth, and seventh order aberration theory and predict results in very good agreement with exact ray tracing. It has also been shown that one of the two terms in the empirical formula of VanSpeybroeck and Chase for the RMS blur circle radius of a Wolter I telescope can be justified in terms of the aberration theory results. Numerical results are given comparing the RMS blur radius and the surface of best focus versus the half field angle computed by skew ray tracing and from the analytical formulas for grazing incidence Wolter I-II telescopes and a normal incidence Cassegrain telescope.

Paper Details

Date Published: 11 October 1989
PDF: 15 pages
Proc. SPIE 1113, Reflective Optics II, (11 October 1989); doi: 10.1117/12.955569
Show Author Affiliations
David L. Shealy, University of Alabama at Birmingham (United States)
Timo T. Saha, NASA/Goddard Space Flight Center (United States)


Published in SPIE Proceedings Vol. 1113:
Reflective Optics II
Dietrich G. Korsch, Editor(s)

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