2014/03/26 by Aglaé Kellerer, Kellerer, Aglae
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Advanced optical system design #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Optical Wireless Communication Technologies
paper · pdf · doi:10.48550/arxiv.1403.6673
openalex publication_date 2014/03/26 · openalex created_date 2022/08/28 · openalex updated_date 2026/07/28
The future generation of telescopes will be equipped with multi-conjugate\nadaptive optics (MCAO) systems in order to obtain high angular resolution over\nlarge fields of view. MCAO comes in two flavors: star- and layer-oriented.\nExisting solar MCAO systems rely exclusively on the star-oriented approach.\nEarlier we have suggested a method to implement the layer-oriented approach,\nand in view of recent concerns we now explain the proposed scheme in further\ndetail. We note that in any layer-oriented system one sensor is conjugated to\nthe pupil and the others are conjugated to higher altitudes. For the latter not\nall the sensing surface is illuminated by the entire field-of-view. The\nsuccessful implementation of nighttime layer-oriented systems shows that the\nfield reduction is no crucial limitation. In the solar approach the\nfield-reduction is directly noticeable because it causes vignetting of the\nShack-Hartmann sub-aperture images. It can be accounted for by a suitable\nadjustment of the algorithms to calculate the local wave-front slopes. We\ndispel a further concern related to the optical layout of a layer-oriented\nsolar system.\n