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Sparse-matrix wavefront reconstruction: simulations and experiments

Shi, Fang and MacMartin, Douglas G. and Troy, Mitchell and Brack, Gary L. and Burruss, Rick S. and Dekany, Richard G. (2003) Sparse-matrix wavefront reconstruction: simulations and experiments. In: Adaptive Optical System Technologies II. Proceedings of SPIE. No.4839. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 1035-1044. ISBN 9780819446183.

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Adaptive optics systems with Shack-Hartmann wavefront sensors require reconstruction of the atmospheric phase error from subaperture slope measurements, with every sensor in the array being used in the computation of each actuator command. This fully populated reconstruction matrix can result in a significant computational burden for adaptive optics systems with large numbers of actuators. A method for generating sparse wavefront reconstruction matrices for adaptive optics is proposed. The method exploits the relevance of nearby subaperture slope measurements for control of an individual actuator, and relies upon the limited extent of the influence function for a zonal deformable mirror. Relying only on nearby sensor information can significantly reduce the calculation time for wavefront reconstruction. In addition, a hierarchic controller is proposed to recover some of the global wavefront information. The performance of these sparse wavefront reconstruction matrices was evaluated in simulation, and tested on the Palomar Adaptive Optics System. This paper presents some initial results from the simulations and experiments.

Item Type:Book Section
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MacMartin, Douglas G.0000-0003-1987-9417
Additional Information:© 2003 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was performed in part at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Observations at the Palomar Observatory were made as part of a continuing collaborative agreement between Palomar Observatory and the Jet Propulsion Laboratory.
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Subject Keywords:Adaptive Optics, Wavefront Sensor, Wavefront Reconstruction, Decentralized Control
Series Name:Proceedings of SPIE
Issue or Number:4839
Record Number:CaltechAUTHORS:20181213-143633632
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Official Citation:Fang Shi, Douglas G. MacMartin, Mitchell Troy, Gary L. Brack, Rick S. Burruss, Richard G. Dekany, "Sparse-matrix wavefront reconstruction: simulations and experiments," Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); doi: 10.1117/12.457134
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91821
Deposited By: George Porter
Deposited On:18 Dec 2018 23:32
Last Modified:16 Nov 2021 03:44

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