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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 16 — Jun. 1, 2000
  • pp: 2525–2538

Adaptive optics: wave-front correction by use of adaptive filtering and control

James Steven Gibson, Chi-Chao Chang, and Brent L. Ellerbroek  »View Author Affiliations


Applied Optics, Vol. 39, Issue 16, pp. 2525-2538 (2000)
http://dx.doi.org/10.1364/AO.39.002525


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Abstract

A class of adaptive-optics problems is described in which phase distortions caused by atmospheric turbulence are corrected by adaptive wave-front 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 used in conventional adaptive optics. The basic problem is posed as an adaptive disturbance-rejection problem with many channels. The solution given is an adaptive feedforward control loop built around a multichannel adaptive lattice filter. Simulation results are presented for a 1-m telescope with both one-layer and two-layer atmospheric turbulence profiles. These results demonstrate the significant improvement in imaging resolution produced by the adaptive control loop compared with a classical linear time-invariant control loop.

© 2000 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.7060) Atmospheric and oceanic optics : Turbulence
(110.6770) Imaging systems : Telescopes

History
Original Manuscript: February 25, 2000
Revised Manuscript: February 25, 2000
Published: June 1, 2000

Citation
James Steven Gibson, Chi-Chao Chang, and Brent L. Ellerbroek, "Adaptive optics: wave-front correction by use of adaptive filtering and control," Appl. Opt. 39, 2525-2538 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-16-2525


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