Engineering of Aberrated PSF by Asymmetric Apodization with the Complex Shaded Aperture

Abstract

The point spread function (PSF) produced by a coherent optical system under the influence of defocus, coma, and primary spherical aberration (PSA) is examined in this work. This paper deals with asymmetric apodization and pupil engineering to control monochromatic aberrations. To reduce the influence of monochromatic aberrations on the diffracted PSF, this approach uses amplitude and phase apodization. Analytical investigations on intensity PSF are carried out with varying amounts of aberrations and degrees of amplitude and phase apodization. Computed central peak intensity and full width at half maxima (FWHM) and analyzed. The resolution of a diffraction-limited optical imaging system is improved by using an asymmetric optical filter that minimizes the effect of defocus.

Mitigation of Edge Ringing for the Optimization of Highly Aberrated Coherent Optical Systems

“…The above equation ( 9) gives the object's modified spectrum at the optical system's exit pupil. The inverse Fourier Transform of expression will give the amplitude distribution spectrum in the image plane (9). Therefore,…”

“…Apodization is a subset of the more general spatial filtering approach [3]. Apodization can help an aberrated optical system improve certain aspects of its imaging performance [8][9][10]. To improve image quality, some researchers have investigated various pupil functions' edge-ringing and edge-shifting aspects [11][12][13].…”