Adaptive Control for Adaptive Optics AO

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Adaptive Control for Adaptive Optics (AO)
Steve Gibson, UCLA (gibson_at_ucla.edu) AFOSR Grants
F49620-02-01-0319 and F-49620-03-1-0234
Adaptive Optics as a Control Problem
Intended Applications Laser Weapons (ABL)
Recent Application Atmospheric Simulation and
Adaptive-optics Laboratory Testbed (ASALT) at the
Starfire Optical Range (AFRL), Kirtland AFB Troy
A. Rhoadarmer, Laura M. Klein, Steve Gibson, Neil
Chen and Yu-Tai Lu, Adaptive control and
filtering for closed-loop adaptive-optical
wavefront reconstruction, SPIE Vol. 6306,
2006. Novel scheme for enhancing beam control in
adaptive optics, SPIE Newsroom,
http//newsroom.spie.org/x4973.xml?highlightx537
y measured wavefront c control command
vector UCLA Innovation Adaptive lattice filter
L(z) predicts wavefront to compensate for loop
latency and limited bandwidth of classical AO
loop.

• Two Types of Implementation
• Fully adaptive filter gains updated at each
  frame
• Quasi-adaptive gains updated periodically

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ASALT LabU.S. Air Force Research Laboratory,
Kirtland AFB, NM

• AO Test Evaluation Laboratory

Atmospheric Turbulence Simulator
577-channel Deformable Mirror25 actuators across
pupil
Well-controlled calibrated and
reproducible test conditions
Indigo Phoenix cameras
Flexible test over a wide range of
operational scenarios
49x49 SRI-WFS
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ASALT TestbedObjective Use adaptive optics to
maintain tight, high-intensity image on scoring
camera.
Experimental Results
Representative Closed-loop Scoring Camera Images
Average Closed-Loop Strehl Ratios
AFRL research sponsored by AFOSR Laboratory Task
LRIR-93DE01COR. UCLA research sponsored by HEL
JTO and AFOSR, AFOSR Grants F49620-02-01-0319 and
F-49620-03-1-0234.