Fig. 3
From: Investigation of rectangular apertures and their application on speckle imaging
a The PSF for the aperture shown in the Fig. 1a, in the range from 500 to 526 pixels. The cut-off for the central lope = 15 pixels while the central peak at 14 pixels. FWHM = 1 pixels. b The PSF for the aperture shown in the Fig. 1b, in the range from 500 to 526 pixels. The cut-off for the central lope = 15 pixels while the central peak at 14 pixels. FWHM = 1 pixels. c The PSF for the aperture shown in the Fig. 1c, in the range from 500 to 526 pixels. The cut-off for the central lope = 15 pixels while the central peak at 14 pixels. FWHM = 1 pixels. The side lobes are strengthen compared with that shown in the figure (b). d The PSF for the whole square of dimensions 640 × 640 pixels in the same range as in the figure (c). The cut-off for the central lope = 17 pixels while the central peak at 14 pixels. FWHM = 3 pixels