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

E. Gendron; D. Gratadour

doi:10.1117/12.925558

13 September 2012 Comparison of LGS wavefront-sensing with pyramid, yaw, and quad-cell types wavefront sensors

E. Gendron, D. Gratadour

Proceedings Volume 8447, Adaptive Optics Systems III; 844713 (2012) https://doi.org/10.1117/12.925558
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

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.

Citation Download Citation

E. Gendron and D. Gratadour "Comparison of LGS wavefront-sensing with pyramid, yaw, and quad-cell types wavefront sensors", Proc. SPIE 8447, Adaptive Optics Systems III, 844713 (13 September 2012); https://doi.org/10.1117/12.925558

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