Search results for "Cyclotomic fast Fourier transform"

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Fast algorithms for free-space diffraction patterns calculation

1999

Here we present a fast algorithm for Fresnel integral calculation. Some fast algorithms using the fast Fourier transform are analysed and their performance has been checked. These methods are of easy implementation, but are only valid for a specific range of distances. Fast algorithms based on the Fractional Fourier transform allow accurate evaluation of the Fresnel integral from object to Fraunhofer domain in a single step.

DiffractionComputer sciencebusiness.industryFast Fourier transformPhysics::OpticsFresnel integralAtomic and Molecular Physics and OpticsDiscrete Fourier transformFractional Fourier transformElectronic Optical and Magnetic MaterialsDiscrete Fourier transform (general)symbols.namesakeCyclotomic fast Fourier transformOpticsFourier transformsymbolsPseudo-spectral methodElectrical and Electronic EngineeringPhysical and Theoretical ChemistryHarmonic wavelet transformbusinessAlgorithmFresnel diffractionOptics Communications
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