Very low noise Shack-Hartmann wavefront sensor for adaptive optics in the near-IR

Silvère Gousset; Clélia Robert; Thierry Fusco; Vincent Michau; Cyril Petit; Sophie Derelle; Joel Deschamps; Philippe Feautrier; Eric Stadler; Eric D. de Borniol; Johan Rothman; Jérôme Coussement

doi:10.1117/12.2057712

21 July 2014 Very low noise Shack-Hartmann wavefront sensor for adaptive optics in the near-IR

Silvère Gousset, Clélia Robert, Thierry Fusco, Vincent Michau, Cyril Petit, Sophie Derelle, Joel Deschamps, Philippe Feautrier, Eric Stadler, Eric D. de Borniol, Johan Rothman, Jérôme Coussement

Author Affiliations +

Proceedings Volume 9148, Adaptive Optics Systems IV; 91481A (2014) https://doi.org/10.1117/12.2057712
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

Near-Infrared wave front sensing allows to enhance sky coverage with adaptive optics. The recently developed HgCdTe avalanche photodiode arrays are promising, but still present an unperfect cosmetic. After the fine characterization of such a HgCdTe array, we propose a statistical model of the pixel response. Assuming the cosmetic is partially corrected, we simulate the impact of the residual error on a Shack-Hartmann wavefront sensor measurement. The study shows the operability of such a real time correction, and of the HgCdTe APD array characterized in this framework: the RAPID camera.

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Silvère Gousset, Clélia Robert, Thierry Fusco, Vincent Michau, Cyril Petit, Sophie Derelle, Joel Deschamps, Philippe Feautrier, Eric Stadler, Eric D. de Borniol, Johan Rothman, and Jérôme Coussement "Very low noise Shack-Hartmann wavefront sensor for adaptive optics in the near-IR", Proc. SPIE 9148, Adaptive Optics Systems IV, 91481A (21 July 2014); https://doi.org/10.1117/12.2057712

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KEYWORDS

Adaptive optics

Wavefront sensors

Mercury cadmium telluride

Sensors

Avalanche photodetectors

Calibration

Cameras

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