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| Chambouleyron, V; Fauvarque, Olivier; Janin-potiron, P.; Correia, C.; Sauvage, J-f; Schwartz, N.; Neichel, B.; Fusco, T.. |
| Context. Extremely large telescopes are overwhelmingly equipped with pyramid wavefront sensors (PyWFS) over the more widely used Shack-Hartmann wavefront sensor to perform their single-conjugate adaptive optics (SCAO) mode. The PyWFS, a sensor based on Fourier filtering, has proven to be highly successful in many astronomy applications. However, this sensor exhibits non-linear behaviours that lead to a reduction of the sensitivity of the instrument when working with non-zero residual wavefronts. This so-called optical gains (OG) effect, degrades the closed-loop performance of SCAO systems and prevents accurate correction of non-common path aberrations (NCPA).Aims. In this paper, we aim to compute the OG using a fast and agile strategy to control PyWFS... |
| Tipo: Text |
Palavras-chave: Instrumentation: adaptive optics; Atmospheric effects. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00666/77856/80014.pdf |
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