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Proceedings Paper

Modal Fourier wavefront reconstruction using graphics processing units
Author(s): José M. Rodríguez-Ramos; José G. Marichal-Hernández; Fernando Rosa
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Paper Abstract

Large degree-of-freedom real-time adaptive optics control requires reconstruction algorithms computationally efficient and readily parallelized for hardware implementation. Lysa Poyneer (2002) has shown that the wavefront reconstruction with the use of the fast Fourier transform (FFT) and spatial filtering is computationally tractable and sufficiently accurate for its use in large Shack-Hartmann-based adaptive optics systems (up to 10,000 actuators). We show here that by use of Graphical Processing Units (GPUs), a specialized hardware capable of performing FFTs on big sequences almost 7 times faster than a high-end CPU, a problem of up to 50,000 actuators can be already done within a 6 ms limit. The method to adapt the FFT in an efficient way for the underlying architecture of GPUs is given.

Paper Details

Date Published: 27 June 2006
PDF: 11 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 627215 (27 June 2006); doi: 10.1117/12.670406
Show Author Affiliations
José M. Rodríguez-Ramos, Univ. de La Laguna (Spain)
José G. Marichal-Hernández, Univ. de La Laguna (Spain)
Fernando Rosa, Univ. de La Laguna (Spain)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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