Complex Pupil Masks for Aberrated Imaging of Closely Spaced Objects


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Abstract

Current approach demonstrates the suppression of optical side-lobes and the contraction of the main lobe in the composite image of two object points of the optical system under the influence of defocusing effect when an asymmetric phase edges are imposed over the apodized circular aperture. The resolution of two point sources having different intensity ratio is discussed in terms of the modified Sparrow criterion, functions of the degree of coherence of the illumination, the intensity difference and the degree of asymmetric phase masking. Here we have introduced and explored the effects of focus aberration (defect-of-focus) on the two-point resolution of the optical systems. Results on the aberrated composite image of closely spaced objects with amplitude mask and asymmetric phase masks forms a significant contribution in astronomical and microscopic observations.

About the authors

A. N. K. Reddy

Samara National Research University; Department of Physics (H&S)

Author for correspondence.
Email: naarereddy@gmail.com
Russian Federation, Samara, 443086; Hyderabad, 501401

D. K. Sagar

Optics Research Group, Department of Physics, University College of Science

Email: naarereddy@gmail.com
India, Hyderabad, Telangana, 500007

S. N. Khonina

Samara National Research University; Image Processing Systems Institute–Branch of the FSRC “Crystallography and Photonics” of Russian Academy of Sciences

Email: naarereddy@gmail.com
Russian Federation, Samara, 443086; Samara, 443001

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