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Journal of Electronic Imaging

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

Large degree-of-freedom, real-time adaptive optics control requires reconstruction algorithms that are computationally efficient and readily parallelized for hardware implementation. Poyneer et al. [J. Opt. Soc. Am. A 19, 2100–2111 (2002)] have 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 the use of graphical processing units (GPUs), a specialized hardware capable of performing FFTs on big sequences almost 5 times faster than a high-end CPU, a problem of up to 50,000 actuators can already be done within a 6-ms limit. We give the method to adapt the FFT in an efficient way for the underlying architecture of GPUs.

Paper Details

Date Published: 1 April 2007
PDF: 9 pages
J. Electron. Imaging. 16(2) 023005 doi: 10.1117/1.2732379
Published in: Journal of Electronic Imaging Volume 16, Issue 2
Show Author Affiliations
José Gil Marichal-Hernandez, Univ. de La Laguna (Spain)
José M. Rodríguez-Ramos, Univ. de La Laguna (Spain)
Fernando L. Rosa, Univ. de La Laguna (Spain)


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