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Proceedings Paper

Pancake ELT: a practical design for an Extremely Large Telescope
Author(s): Mark R. Ackermann; John T. McGraw; Peter C. Zimmer
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Paper Abstract

In this paper we present optical designs for an entirely new approach to extremely large telescopes and telescopes with spherical primary mirrors. The key feature is a novel optical system referred to as the improved spherical aberration corrector (ISAC). This corrector works exceptionally well for post prime focus applications, as well as for Cassegrain and Couder/Schwarzschild-like optical systems with both spherical primary and spherical secondary mirrors. The Couder/Schwarzschild configuration also adapts to a pancake configuration where the telescope is physically shorter than its aperture.

Paper Details

Date Published: 4 August 2010
PDF: 19 pages
Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 773320 (4 August 2010); doi: 10.1117/12.857062
Show Author Affiliations
Mark R. Ackermann, Sandia National Labs. (United States)
John T. McGraw, The Univ. of New Mexico (United States)
Peter C. Zimmer, The Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 7733:
Ground-based and Airborne Telescopes III
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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