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Proceedings Paper

Mitigation of third order spherical, coma, and astigmatism using segmented mirrors
Author(s): James Contreras
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Paper Abstract

Constructing telescope pupil mirrors, most traditionally the primary mirror, from a series of hexagonal segments enables the construction of larger telescopes and offers a degree of aberration mitigation beyond what is feasible with traditional monolithic mirror design. The degree of correction possible varies as a function of the number of segments used to construct the mirror, the nature of the mirror surface, and the degrees of freedom available to adjust each segment. This presentation discusses the degree of aberration mitigation possible as the number of segments used increases from 6 to 60 for a constant aperture system. It includes considerations for powered or flat segmented mirrors for the cases where segmentation at other pupil positions besides the primary might be considered. It also includes the effects of 3 levels of segment adjustability: (a) piston and tilt only, (b) 6 degree of freedom, and (c) 6DOF plus radius of curvature adjustment.

Paper Details

Date Published: 22 June 2006
PDF: 9 pages
Proc. SPIE 6271, Modeling, Systems Engineering, and Project Management for Astronomy II, 62710J (22 June 2006); doi: 10.1117/12.669362
Show Author Affiliations
James Contreras, Ball Aerospace and Technologies Corp. (United States)

Published in SPIE Proceedings Vol. 6271:
Modeling, Systems Engineering, and Project Management for Astronomy II
Martin J. Cullum; George Z. Angeli, Editor(s)

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