Robert Praus (MZA Associates Corporation)
Keywords: Adaptive Optics, Fried Geometry, Waffle
Abstract:
A common difficulty of Fried geometry-based adaptive optics is the build-up of the unsensed spatial wavefront mode called waffle. This paper presents a Fried geometry wavefront reconstructor matrix which ameliorates the impact the waffle mode in closed-loop adaptive optics systems. Typical waffle suppression algorithms employ spatial filters that can adversely affect the adaptive optics system’s ability to correct the highest spatial frequencies. Because it is not based on spatial filtering techniques, but on algebraic constraints in the development of the reconstructor matrix itself, the waffle constrained reconstructor does not sacrifice correction of high spatial frequencies in order to reduce waffle. This paper will provide the mathematical development of the waffle constrained reconstructor and provide analysis of its closed-loop performance as compared to other recontructors utilizing high-fidelity wave-optics simulations.
Date of Conference: September 9-12, 2014
Track: Poster