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

Kevin P. Vitayaudom; Darryl J. Sanchez; Denis W. Oesch; Patrick R. Kelly; Carolyn M. Tewksbury-Christle; Julie C. Smith

doi:10.1117/12.825413

11 August 2009 Experimental analysis of perspective elongation effects using a laser guide star in an adaptive-optics system

Kevin P. Vitayaudom, Darryl J. Sanchez, Denis W. Oesch, Patrick R. Kelly, Carolyn M. Tewksbury-Christle, Julie C. Smith

Author Affiliations +

Proceedings Volume 7466, Advanced Wavefront Control: Methods, Devices, and Applications VII; 746604 (2009) https://doi.org/10.1117/12.825413
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

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.

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Kevin P. Vitayaudom, Darryl J. Sanchez, Denis W. Oesch, Patrick R. Kelly, Carolyn M. Tewksbury-Christle, and Julie C. Smith "Experimental analysis of perspective elongation effects using a laser guide star in an adaptive-optics system", Proc. SPIE 7466, Advanced Wavefront Control: Methods, Devices, and Applications VII, 746604 (11 August 2009); https://doi.org/10.1117/12.825413

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