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Modal Fourier wavefront reconstruction using graphics processing units

[+] Author Affiliations
José G. Marichal-Hernández

Universidad de La Laguna, Tenerife, Spain E-mail: jmariher@ull.es

José M. Rodríguez-Ramos

Universidad de La Laguna, Tenerife, Spain E-mail: jmariher@ull.es

Fernando Rosa

Universidad de La Laguna, Tenerife, Spain E-mail: jmariher@ull.es

J. Electron. Imaging. 16(2), 023005 (May 01, 2007). doi:10.1117/1.2732379
History: Received June 02, 2006; Revised December 14, 2006; Accepted December 21, 2006; Published May 01, 2007
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Large degree-of-freedom, real-time adaptive optics control requires reconstruction algorithms that are computationally efficient and readily parallelized for hardware implementation. 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.

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© 2007 SPIE and IS&T

Citation

José G. Marichal-Hernández ; José M. Rodríguez-Ramos and Fernando Rosa
"Modal Fourier wavefront reconstruction using graphics processing units", J. Electron. Imaging. 16(2), 023005 (May 01, 2007). ; http://dx.doi.org/10.1117/1.2732379


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