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Proceedings Paper

Adaptive reconstructors for adaptive optics
Author(s): Steve Gibson; C.-C. Chang; Brent L. Ellerbroek
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Paper Abstract

This paper concerns a class of adaptive optics problems in which phase distortions due to atmospheric turbulence are corrected by adaptive wavefront reconstruction with a deformable mirror - i.e., the control loop that drives the mirror adapts in real time to time-varying atmospheric conditions, as opposed to the linear time-invariant control loops use din conventional 'adaptive optics.' The basic problem is posed here as an adaptive disturbance rejection problem with many channels. The solution given here is to augment a linear time-invariant feedback control loop with an adaptive feedforward control loop based on a multichannel adaptive lattice filter. Simulation results are presented for a one-meter telescope with both single-layer and two- layer atmospheric turbulence profiles. These results demonstrate the significant improvement in imagin resolution produced by the adaptive control loop.

Paper Details

Date Published: 3 August 1999
PDF: 12 pages
Proc. SPIE 3706, Airborne Laser Advanced Technology II, (3 August 1999); doi: 10.1117/12.356973
Show Author Affiliations
Steve Gibson, Univ. of California/Los Angeles (United States)
C.-C. Chang, Univ. of California/Los Angeles (United States)
Brent L. Ellerbroek, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 3706:
Airborne Laser Advanced Technology II
Todd D. Steiner; Paul H. Merritt, Editor(s)

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