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Proceedings Paper

Experimental analysis of perspective elongation effects using a laser guide star in an adaptive-optics system
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Paper Abstract

The use of a laser guidestar (LGS) for the purpose of a beacon in an adaptive-optics (AO) system is prone to perspective elongation effects on the spots of a Shack-Hartmann wavefront sensor. The elongated spots can vary in size over the subapertures and affect the gradient sensitivity of the sensor. The Air Force Research Laboratory (AFRL) has developed a LGS model that outputs gradient gains which represent the effects of an extended beacon on the spots for a Shack-Hartmann wavefront sensor. This paper investigates the application of these gains in an experimental setup in order to both analyze the effects of the variation in those gains due to spot size elongation and to measure the impact on the performance of an AO system.

Paper Details

Date Published: 12 August 2009
PDF: 11 pages
Proc. SPIE 7466, Advanced Wavefront Control: Methods, Devices, and Applications VII, 746604 (12 August 2009); doi: 10.1117/12.825413
Show Author Affiliations
Kevin P. Vitayaudom, Air Force Research Lab. (United States)
Darryl J. Sanchez, Air Force Research Lab. (United States)
Denis W. Oesch, Science Applications International Corp. (United States)
Patrick R. Kelly, Air Force Research Lab. (United States)
Carolyn M. Tewksbury-Christle, Air Force Research Lab. (United States)
Julie C. Smith, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 7466:
Advanced Wavefront Control: Methods, Devices, and Applications VII
Richard A. Carreras; Troy A. Rhoadarmer; David C. Dayton, Editor(s)

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