par Rodrigues, Gonçalo;Bastaits, Renaud 
;Preumont, André
Référence International Journal of Optomechatronics, 4, 3, page (217-236)
Publication Publié, 2010
;Preumont, André Référence International Journal of Optomechatronics, 4, 3, page (217-236)
Publication Publié, 2010
Article révisé par les pairs
| Résumé : | Atmospheric turbulence compensation for the next generation of terrestrial telescopes (30-40m diameter) will require deformable mirrors of increasing size and a number of actuators reaching several thousands. However, the mere extrapolation of existing designs leads to complicated and extremely expensive mirrors. This article discusses an alternative solution based on the use of segmented identical hexagonal bimorph mirrors. This allows to indefinitely increase the degree of correction while maintaining the first mechanical resonance at the level of a single segment, and shows an increase in price only proportional to the number of segments. Extensive simulations using random turbulent screens show that the segmentation produces only moderate reductions of the Strehl number, compared to a monolithic bimorph mirror with the same number of actuators (S = 0.86 instead of S = 0.89 in this study). © Taylor & Francis Group, LLC. |
