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13 September 2012 Comparison of LGS wavefront-sensing with pyramid, yaw, and quad-cell types wavefront sensors
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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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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); doi: 10.1117/12.925558; https://doi.org/10.1117/12.925558
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