Tailoring of Defocused Point Spread Function of Asymmetrically Apodized Four Zone Aperture Optical Imaging System in the presence of Primary Spherical Aberration

Abstract

In this paper we present the attempts made for the improvement of the resolution of an optical system in the presence of higher orders of defocus and primary spherical aberration function by introducing four level asymmetric filters of Triangular, Connes, Polynomial and Hanning. Four zone aperture shading amplitude in each zone have been tested for better results. Using the above four filters placing Triangular filter in the inner zone, Connes filter in the second zone, Polynomial filter in the third zone and Hanning filter in the outer zone at higher degrees of both defocusing and primary spherical aberration situation provides the optical system to achieve super-resolver state. The highest degree of the amplitude apodization improves the lateral resolution of the central maxima and suppression of side lobes which helps to study the two point resolution.