Design of the first-generation wavefront sensor and actuator geometry for the 6.5-m MMT adaptive optical system

Troy A. Rhoadarmer; Patrick C. McGuire; Michael Lloyd-Hart; James Roger P. Angel; Brian Cuerden; Bruce C. Fitz-Patrick; David G. Sandler

doi:10.1117/12.321715

11 September 1998 Design of the first-generation wavefront sensor and actuator geometry for the 6.5-m MMT adaptive optical system

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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Proceedings Volume 3353, Adaptive Optical System Technologies; (1998) https://doi.org/10.1117/12.321715
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

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.

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Troy A. Rhoadarmer, Patrick C. McGuire, Michael Lloyd-Hart, James Roger P. Angel, Brian Cuerden, Bruce C. Fitz-Patrick, and David G. Sandler "Design of the first-generation wavefront sensor and actuator geometry for the 6.5-m MMT adaptive optical system", Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); https://doi.org/10.1117/12.321715

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KEYWORDS

Actuators

Adaptive optics

Mirrors

Wavefronts

Telescopes

Finite element methods

Reconstruction algorithms

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