Table of Contents
Advances in Optics
Volume 2014, Article ID 963980, 7 pages
Research Article

Reduction in Edge-Ringing in Aberrated Images of Coherent Edge Objects by Multishaded Aperture

Optics Research Group, Department of Physics, Osmania University, Hyderabad, Telangana 500007, India

Received 28 April 2014; Accepted 21 July 2014; Published 20 August 2014

Academic Editor: Shuangchun Wen

Copyright © 2014 Venkanna Mekala and Karuna Sagar Dasari. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The images of a straight edge in coherent illumination produced by an optical system with circular aperture and apodized with multiple filters have been studied. The most common problem encountered in the coherent-imaging techniques is the edge-ringing. To minimize the edge-ringing, multishaded aperture method has been proposed. Image intensity distribution curves are drawn and edge-ringing values are evaluated. The results are compared to that of the airy case with the use of single, double and triple filtering.