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11 October 1989 Formula For The RMS Blur Circle Radius Of Wolter Telescopes Based On Aberration Theory
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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.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David L. Shealy and Timo T. Saha "Formula For The RMS Blur Circle Radius Of Wolter Telescopes Based On Aberration Theory", Proc. SPIE 1113, Reflective Optics II, (11 October 1989); https://doi.org/10.1117/12.955569
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