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Proceedings Paper

Design of the first-generation wavefront sensor and actuator geometry for the 6.5-m MMT adaptive optical system
Author(s): Troy A. Rhoadarmer; Patrick C. McGuire; Michael Lloyd-Hart; James Roger P. Angel; Brian Cuerden; Bruce C. Fitz-Patrick; David G. Sandler
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Paper Abstract

A description is given for the geometry of the first generation adaptive-optical (AO) system being developed for the 6.5m single-mirror telescope that will replace the Multiple Mirror Telescope on Mt. Hopkins. The AO system consists of an adaptive secondary mirror with 330-actuators and a wave front senor composed of a 13 by 13 square subaperture array. The deformable mirror actuator vibrational modes were determined from a finite element model of the adaptive-secondary mirror. Numerical simulations in based on the finite element results were carried out to determine the expected performance of the system. Two reconstruction algorithms were compared - a least squares reconstructor and a modal equalization technique developed for this AO geometry. Strehl ratios are reported for the two algorithms for various guide star magnitudes and number of corrected wave front modes.

Paper Details

Date Published: 11 September 1998
PDF: 12 pages
Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); doi: 10.1117/12.321715
Show Author Affiliations
Troy A. Rhoadarmer, Steward Observatory/Univ. of Arizona (United States)
Patrick C. McGuire, Steward Observatory/Univ. of Arizona (Spain)
Michael Lloyd-Hart, Steward Observatory/Univ. of Arizona (United States)
James Roger P. Angel, Steward Observatory/Univ. of Arizona (United States)
Brian Cuerden, Steward Observatory/Univ. of Arizona (United States)
Bruce C. Fitz-Patrick, Steward Observatory/Univ. of Arizona (United States)
David G. Sandler, ThermoTrex Corp. and Steward Observatory/Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 3353:
Adaptive Optical System Technologies
Domenico Bonaccini; Robert K. Tyson, Editor(s)

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