Translator Disclaimer
3 August 1999 Adaptive reconstructors for adaptive optics
Author Affiliations +
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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Steve Gibson, C.-C. Chang, and Brent L. Ellerbroek "Adaptive reconstructors for adaptive optics", Proc. SPIE 3706, Airborne Laser Advanced Technology II, (3 August 1999);

Back to Top