Modal Fourier wavefront reconstruction using graphics processing units

José M. Rodríguez-Ramos; José G. Marichal-Hernández; Fernando Rosa

doi:10.1117/12.670406

27 June 2006 Modal Fourier wavefront reconstruction using graphics processing units

José M. Rodríguez-Ramos, José G. Marichal-Hernández, Fernando Rosa

Proceedings Volume 6272, Advances in Adaptive Optics II; 627215 (2006) https://doi.org/10.1117/12.670406
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

Citation Download Citation

José M. Rodríguez-Ramos, José G. Marichal-Hernández, and Fernando Rosa "Modal Fourier wavefront reconstruction using graphics processing units", Proc. SPIE 6272, Advances in Adaptive Optics II, 627215 (27 June 2006); https://doi.org/10.1117/12.670406

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