1 April 2007 Modal Fourier wavefront reconstruction using graphics processing units
Author Affiliations +
J. of Electronic Imaging, 16(2), 023005 (2007). doi:10.1117/1.2732379
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.
José Gil Marichal-Hernandez, José M. Rodríguez-Ramos, Fernando L. Rosa, "Modal Fourier wavefront reconstruction using graphics processing units," Journal of Electronic Imaging 16(2), 023005 (1 April 2007). https://doi.org/10.1117/1.2732379

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