Fig. 5
From: Investigation of a new modulated aperture using speckle techniques
a An aperture composed of eight equally spaced uniform circles surrounded by an annulus. The external radius of the whole aperture = 352 pixels, the annular width = 16 pixels, and radius of each circle = 64 pixels. The matrix of dimensions 1024 × 1024 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 a