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Proceedings Paper

Shack-Hartmann wavefront sensing error induced by laser illumination
Author(s): M.-T. Velluet; G. Rousset; T. Fusco
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Paper Abstract

The speckles produced in the image of a laser-illuminated object introduce errors in the wavefrontmeasurement by a Shack Hartmann (SH) Wave-Front Sensor (WFS). The speckles are similar to a spatial noise onto the image and contribute to the error in the computation of the image position for each lenslet of the sensor. This speckle error impacts directly the performance of an adaptive optics system. We express this error term for different cases without and with turbulence and show that it is an additive white noise. Based on end to end numerical simulations, we quantify the speckle error and compare it to the turbulent wavefront variance in different turbulence regimes.

Paper Details

Date Published: 13 October 2005
PDF: 9 pages
Proc. SPIE 5981, Optics in Atmospheric Propagation and Adaptive Systems VIII, 59810M (13 October 2005); doi: 10.1117/12.628107
Show Author Affiliations
M.-T. Velluet, ONERA (France)
G. Rousset, ONERA (France)
T. Fusco, ONERA (France)


Published in SPIE Proceedings Vol. 5981:
Optics in Atmospheric Propagation and Adaptive Systems VIII
Karin Stein; Anton Kohnle, Editor(s)

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