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Proceedings Paper

Comparison of a Shack-Hartmann and distorted grating wavefront sensor using WaveTrain simulation software
Author(s): Gavin R. G. Erry; Paul Harrison; Leonard John Otten; Lawrence D. Weaver
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Paper 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.

Paper Details

Date Published: 11 November 2004
PDF: 11 pages
Proc. SPIE 5572, Optics in Atmospheric Propagation and Adaptive Systems VII, (11 November 2004); doi: 10.1117/12.584584
Show Author Affiliations
Gavin R. G. Erry, Kestrel Corp. (United States)
Paul Harrison, Kestrel Corp. (United States)
Leonard John Otten, Kestrel Corp. (United States)
Lawrence D. Weaver, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 5572:
Optics in Atmospheric Propagation and Adaptive Systems VII
John D. Gonglewski; Karin Stein, Editor(s)

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