11 November 2004 Comparison of a Shack-Hartmann and distorted grating wavefront sensor using WaveTrain simulation software
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Abstract
The concept of a curvature-based wavefront sensor using a distorted grating as the imaging element to capture images of two spatially separated planes onto a single detector has been reported previously. This presentation reports on simulations comparing a Shack-Hartmann (S-H) sensor with a distorted grating wavefront sensor (DGWFS) for a generic adaptive optics (AO) system using a Clear-1 atmospheric model. Using WaveTrainTM simulation software a model of the DGWFS has been developed and integrated into the software. A simulation of a complete AO system including a tip/tilt system, high order correction system, atmospheric model, and a back-propagating laser system has been constructed. The model has then been exercised using various seeing conditions, noise levels, WFS sensitivities, camera systems, and other parameters. A comparison between the performance of the AO system using the S-H sensor and the DGWFS is presented, both in terms of wavefront measurement accuracy, image quality, and as a beam delivery system.
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Gavin R. G. Erry, Gavin R. G. Erry, Paul Harrison, Paul Harrison, Leonard John Otten, Leonard John Otten, Lawrence D. Weaver, Lawrence D. Weaver, } "Comparison of a Shack-Hartmann and distorted grating wavefront sensor using WaveTrain simulation software", Proc. SPIE 5572, Optics in Atmospheric Propagation and Adaptive Systems VII, (11 November 2004); doi: 10.1117/12.584584; https://doi.org/10.1117/12.584584
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