15 July 2008 The double pyramid wavefront sensor for LBT
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Abstract
The wavefront sensor (WFS) for the Large Binocular Telescope is based on a pyramid sensor with a maximum sampling of 30x30 subapertures. In particular the pyramid used in the WFS is a Double Pyramid (DP). This for two reasons: the first is that so doing it is possible to have pyramids with a base angle greeter than the angle of a single pyramid so that athe polishing process is made easier. The second is that it is possible to reduce the chromatic effects that the use of a single pyramid introduces. This enables to work with a larger wavelenght range.
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A. Tozzi, A. Tozzi, P. Stefanini, P. Stefanini, E. Pinna, E. Pinna, S. Esposito, S. Esposito, } "The double pyramid wavefront sensor for LBT", Proc. SPIE 7015, Adaptive Optics Systems, 701558 (15 July 2008); doi: 10.1117/12.789311; https://doi.org/10.1117/12.789311
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