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Proceedings Paper

Improved spherical aberration corrector for fast spherical primary mirrors
Author(s): Mark R. Ackermann; John T. McGraw; Peter C. Zimmer
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Paper Abstract

In the quest to design large and extremely large telescopes, one of the first questions encountered is that of basic optical configuration and shape of the primary mirror. Spherical mirrors have a number of advantages in production, testing and alignment but suffer from substantial spherical aberration, thereby requiring some form of corrective optics. Many designs for spherical aberration correctors are present in the literature, but each has its strengths and weaknesses. We present the design for a new spherical aberration corrector which is believed to offer higher performance with less complexity than previous approaches. The new design is substantially more compact and uses slower optical surfaces than most axially symmetric designs. It can scale to accommodate apertures as large as 100m, and adapts equally well to post prime focus and Cassegrain-like focus applications.

Paper Details

Date Published: 11 September 2008
PDF: 24 pages
Proc. SPIE 7061, Novel Optical Systems Design and Optimization XI, 70610I (11 September 2008); doi: 10.1117/12.791666
Show Author Affiliations
Mark R. Ackermann, Sandia National Labs. (United States)
John T. McGraw, Univ. of New Mexico (United States)
Peter C. Zimmer, Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 7061:
Novel Optical Systems Design and Optimization XI
R. John Koshel; James D. Moore; David H. Krevor; G. Groot Gregory, Editor(s)

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