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Reduction in Edge-Ringing in Aberrated Images of Coherent Edge Objects by Multishaded Aperture
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 casewith the use of single, double and triple filtering.
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