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Proceedings Paper

Automatic calibration of a phase diversity wavefront sensing and control testbed
Author(s): James A. Georges; Pam Dorrance; Kurt Gleichman; Julie Jonik; Dean Liskow; Harold Lapprich; Vipul Naik; Stuart Parker; Rick Paxman; Matt Warmuth; Aaron Wilson; Tom Zaugg
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Paper Abstract

This paper will report on efforts to automatically calibrate in situ a phase-diversity (PD) wavefront sensing and control (WFS&C) system, the results of which are demonstrated on the General Dynamics Advanced Information System's (GDAIS') QuickStar testbed1, a dual deformable mirror (DM) system which operates at 100Hz sampling rate. The iterative automatic calibration (AutoCal) process includes both coarse and fine calibration modes, initial closed-loop flattening of the commercial-off-the-shelf (COTS) DMs, estimation of the system's static wavefront - including DM print-through, determination of PD-derived actuator influence functions, formulating the resulting system matrix and the resulting forward-model parameters. Analyses of the system after the calibration routines shows low-order WFS accuracy of ~0.005λ RMS and closed-loop residual wavefront measurement of ~0.002λ. All of these results were accomplished with a software package that takes on the order of one hour to operate.

Paper Details

Date Published: 27 September 2007
PDF: 12 pages
Proc. SPIE 6711, Advanced Wavefront Control: Methods, Devices, and Applications V, 671106 (27 September 2007); doi: 10.1117/12.732193
Show Author Affiliations
James A. Georges, General Dynamics Advanced Information Systems (United States)
Pam Dorrance, General Dynamics Advanced Information Systems (United States)
Kurt Gleichman, General Dynamics Advanced Information Systems (United States)
Julie Jonik, General Dynamics Advanced Information Systems (United States)
Dean Liskow, General Dynamics Advanced Information Systems (United States)
Harold Lapprich, General Dynamics Advanced Information Systems (United States)
Vipul Naik, General Dynamics Advanced Information Systems (United States)
Stuart Parker, General Dynamics Advanced Information Systems (United States)
Rick Paxman, General Dynamics Advanced Information Systems (United States)
Matt Warmuth, General Dynamics Advanced Information Systems (United States)
Aaron Wilson, General Dynamics Advanced Information Systems (United States)
Tom Zaugg, General Dynamics Advanced Information Systems (United States)


Published in SPIE Proceedings Vol. 6711:
Advanced Wavefront Control: Methods, Devices, and Applications V
Richard A. Carreras; John D. Gonglewski; Troy A. Rhoadarmer, Editor(s)

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