Morphing of Segmented Bimorph Mirrors

Autor: André Preumont, Gonçalo Rodrigues, Renaud Bastaits
Rok vydání: 2010
Předmět:
Zdroj: International Journal of Optomechatronics. 4:217-236
ISSN: 1559-9620
1559-9612
DOI: 10.1080/15599612.2010.510588
Popis: Atmospheric turbulence compensation for the next generation of terrestrial telescopes (30–40 m 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).
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje