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Proceedings Paper

FPGA adaptive optics system test bench
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Paper Abstract

FPGA (Field Programmable Gate Array) technology has become a very powerful tool available to the electronic designer, specially after the spreading of high quality synthesis and simulation software packages at very affordable prices. They also offer high physical integration levels and high speed, and eases the implementation of parallelism to obtain superb features. Adaptive optics for the next generation telescopes (50-100 m diameter) -or improved versions for existing ones- requires a huge amount of processing power that goes beyond the practical limits of today's processor capability, and perhaps tomorrow's, so FPGAs may become a viable approach. In order to evaluate the feasibility of such a system, a laboratory adaptive optical test bench has been developed, using only FPGAs in its closed loop processing chain. A Shack-Hartmann wavefront sensor has been implemented using a 955-image per second DALSA CA-D6 camera, and a 37-channel OKO mirror has been used for wavefront correcting. Results are presented and extrapolation of the behavior for large and extremely large telescopes is discussed.

Paper Details

Date Published: 25 August 2005
PDF: 9 pages
Proc. SPIE 5903, Astronomical Adaptive Optics Systems and Applications II, 59030D (25 August 2005); doi: 10.1117/12.614378
Show Author Affiliations
Luis F. Rodriguez-Ramos, Institute of Astrophysics of the Canary Islands (Spain)
Teodora Viera, Institute of Astrophysics of the Canary Islands (Spain)
Jose V. Gigante, Institute of Astrophysics of the Canary Islands (Spain)
Fernando Gago, Institute of Astrophysics of the Canary Islands (Spain)
Guillermo Herrera, Institute of Astrophysics of the Canary Islands (Spain)
Angel Alonso, Institute of Astrophysics of the Canary Islands (Spain)
Nicolas Descharmes, Ecole Nationale Superieure des Sciences Appliquees et de Tecnologie (France)


Published in SPIE Proceedings Vol. 5903:
Astronomical Adaptive Optics Systems and Applications II
Robert K. Tyson; Michael Lloyd-Hart, Editor(s)

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