Study the effect of Gaussian Filter on Point Spread Function for elliptical Aperture with elliptical obstruction
Abstract
In this research , Point Spread Function (PSF) for elliptical aperture with elliptical obstruction of different obstruction ratio Ɛ(0.2,0.5, 0.8) was studied for regular illumination together with Gaussian filter. Also the standard deviation modulus was changed to have different value of a (0.2,0.4,0.6,0.8 , 1). The calculations performed for diffraction limited system and with a different values of spherical aberration W40 (0.25 λ , 0.5 λ ,0.75λ). The results showed that as the standard deviation modulus decreased the central intensity of PSF is increased, and the effect of spherical aberration is decreased too. In addition the increasing in obstruction ratio results in decreasing full width half maximum and increasing the secondary peaks of the pattern, i.e. the increase of noise in the image.
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Copyright (c) 2018 Wedad Hamza Terkan
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