Browsing by Subject "Spatial filtering operations"

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    Fourier transforms of fractional order and their optical interpretation
    (Elsevier, 1993) Özaktaş, Haldun M.; Mendlovic, D.
    Fourier transforms of fractional order a are defined in a manner such that the common Fourier transform is a special case with order a=1. An optical interpretation is provided in terms of quadratic graded index media and discussed from both wave and ray viewpoints. Fractional Fourier transforms can extend the range of spatial filtering operations.