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Communication Dans Un Congrès Année : 2012

Comparison of LGS wavefront-sensing with pyramid, yaw, and quad-cell types wavefront sensors

Résumé

LGS wavefront sensing is a topic of importance for future ELTs. However, the elongation effect makes this task particularly difficult on a large apertures, and require large format detectors. An alternative solution is to use quad-cell types wavefront sensors : either shack-hartmann, or pyramid (using only 4 pixels per phase measurement), or yaw (an optical differentiation wavefront sensor proposed recently, also using 4 pixels, like the pyramid). We compare the performance of these devices and we develop a common model of operation, so that their behavior can be directly compared and their differences easily enlightened.
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Dates et versions

hal-03734064 , version 1 (21-07-2022)

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Éric Gendron, Damien Gratadour. Comparison of LGS wavefront-sensing with pyramid, yaw, and quad-cell types wavefront sensors. Adaptive Optics Systems III, Jul 2012, Amsterdam, Netherlands. pp.13, ⟨10.1117/12.925558⟩. ⟨hal-03734064⟩
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