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Proceedings Paper

Active optics and wavefront sensing at the upgraded 6.5-meter MMT
Author(s): Timothy E. Pickering; Steven C. West; Daniel G. Fabricant
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Paper Abstract

Shack-Hartmann wavefront sensors have been commissioned and are now in routine use at both of the optical foci (f/9 and f/5) of the converted MMT. Both units are of moderate resolution with 14x14 square apertures across the pupil for f/5 and 13x13 hexagonal apertures for f/9. They share a common software interface that fits a set of 19 Zernike polynomials to the wavefront errors. Zernike focus and coma are corrected by moving the secondary mirror, third order spherical by a combination of secondary motion and primary bending, and the rest by primary bending alone. In this paper we will describe the two wavefront sensor systems and how they have performed thus far.

Paper Details

Date Published: 28 September 2004
PDF: 11 pages
Proc. SPIE 5489, Ground-based Telescopes, (28 September 2004); doi: 10.1117/12.551008
Show Author Affiliations
Timothy E. Pickering, MMT Observatory, Smithsonian Institution and Univ. of Arizona (United States)
Steven C. West, Steward Observatory/Univ. of Arizona (United States)
Daniel G. Fabricant, Harvard-Smithsonian Ctr. for Astrophysics (United States)

Published in SPIE Proceedings Vol. 5489:
Ground-based Telescopes
Jacobus M. Oschmann, Editor(s)

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