High-speed closed-loop dual deformable-mirror phase-diversity testbed

James A. Georges III; Pam Dorrance; Kurt Gleichman; Julie Jonik; Dean Liskow; Harold Lapprich; Vipul Naik; Stuart Parker; Rick Paxman; Matt Warmuth; Aaron Wilson; Tom Zaugg

doi:10.1117/12.732165

27 September 2007 High-speed closed-loop dual deformable-mirror phase-diversity testbed

James A. Georges III, Pam Dorrance, Kurt Gleichman, Julie Jonik, Dean Liskow, Harold Lapprich, Vipul Naik, Stuart Parker, Rick Paxman, Matt Warmuth, Aaron Wilson, Tom Zaugg

Author Affiliations +

Proceedings Volume 6711, Advanced Wavefront Control: Methods, Devices, and Applications V; 671105 (2007) https://doi.org/10.1117/12.732165
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

A proof-of-concept phase diversity (PD) wavefront sensing and control (WFS&C) testbed has been developed that displays 5/1,000 wave RMS accuracy, operates at a sample rate of 100Hz, uses the extended scene of interest in lieu of a guide star, and is comprised of all low-cost commercial-off-the-shelf (COTS) parts - including the PD processor. This testbed allows closed-loop operation via a dual deformable-mirror (DM) concept where two DMs are optically conjugate to the exit pupil: one acting as an independent disturbance and the other reacting to PD WFS&C commands in order to correct the system wavefront. The use of low-cost, COTS components demonstrated the flexibility of a PD-only WFS&C approach, and additionally allowed for this system to be conceived, designed, assembled and brought to operation in approximately nine months. Automatic calibration efforts begun on this testbed have allowed for the quick discrimination of prominent PD forward-model parameters and a more rapid verification and validation (V&V) process. Also aiding the V&V process is a novel spatial-heterodyning optical interferometer that collects all information in a single snapshot and may be made synchronous with the fast PD sample rate. This demonstration proves a PD-only WFS&C subsystem capability suitable for use on a wide variety of adaptive-optics imaging systems.

Citation Download Citation

James A. Georges III, Pam Dorrance, Kurt Gleichman, Julie Jonik, Dean Liskow, Harold Lapprich, Vipul Naik, Stuart Parker, Rick Paxman, Matt Warmuth, Aaron Wilson, and Tom Zaugg "High-speed closed-loop dual deformable-mirror phase-diversity testbed", Proc. SPIE 6711, Advanced Wavefront Control: Methods, Devices, and Applications V, 671105 (27 September 2007); https://doi.org/10.1117/12.732165

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available