Scintillation Resistant Wave-Front Sensors for Strong-Turbulence Adaptive Optics

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F29601-01-C-0096
Agency Tracking Number: 011NM-1455
Amount: $99,046.00
Phase: Phase I
Program: SBIR
Awards Year: 2001
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
G A TYLER ASSOC., INC.
1341 S. Sunkist St., Anaheim, CA, 92806
DUNS: 801256199
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Terry Brennan
 Senior Scientist
 (714) 772-7668
 tbrennan@tosc.com
Business Contact
 Glenn Tyler
Title: President
Phone: (714) 772-7668
Email: gatyler@tosc.com
Research Institution
N/A
Abstract
Wavefront sensing in high scintillation environments is degraded in conventional sensors by a coupling, in the measurement, between phase and irradiance variations. An evaluation of this effect, and its impact on performance of systems, such as ABL, isproposed. An innovative wavefront sensor design has been proposed which mitigates this effect by pixel-level processing of the data. The design exhibits other advantageous features such as ease of implementation, elimination of the unobservable wafflemode, potential noise gain reduction, and measurements which permit both linear and non-linear (branch-cut) phase reconstruction. This design will be fully evaluated, analytically and in simulation, and fine-tuned as necessary. This proposed sensor design will improve phase gradient measurement precision in high scintillation, resulting in increased Strehl ratio performance of a conventional least-squares reconstruction. It will also support the use of branch-cut phasereconstruction.

* information listed above is at the time of submission.

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