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Proceedings Paper

Adaptive optics reconstruction utilizing supersampled deformable mirror influence functions
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Paper Abstract

Control laws for an adaptive optics system for the Palomar Mountain Hale Telescope are described. These are derived using a linear matrix model of the optics, which gives the Hartman-sensor centroids and the science camera wavefront as functions of deformable mirror (DM) commands and atmospheric phase. The matrices defining this system can be directly measured from the optics, some at finer spatial resolution than the wavefront sensor can resolve. A minimum-wavefront compensator feeds back both the wavefront sensor centroids and previous DM commands, using the atmospheric covariance to smooth the response at the finer spatial scale. The DM command feedback provides direct observability of waffle, piston and other modes unobservable in the wavefront sensor. Compensator gains can be updated using Kalman filtering techniques to track the evolution of the atmospheric covariance matrix.

Paper Details

Date Published: 11 September 1998
PDF: 10 pages
Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); doi: 10.1117/12.321711
Show Author Affiliations
David C. Redding, Jet Propulsion Lab. (United States)
Scott A. Basinger, Jet Propulsion Lab. (United States)
Gary L. Brack, Jet Propulsion Lab. (United States)
Richard G. Dekany, Jet Propulsion Lab. (United States)
Ben R. Oppenheimer, California Institute of Technology (United States)

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

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