Fig. 4From: Investigation of a new modulated aperture using speckle techniquesa Eight equally spaced uniform circular apertures where the centers placed at fixed distance = 268 pixels from the center placed at (512, 512). The radius of each conic aperture = 64 pixels. b Normalized PSF as a function of radial distance r (pixels) in the Fourier plane for a lens limited by the aperture shown in Figure aBack to article page