Effect of defocusing and apodization on the resolution of incoherent optical system beyond the Rayleigh limit

We have investigated the resolution of the two overlapping point sources produced by the defocused incoherent system. By employing the quadratic amplitude filter in the pupil plane, the resultant intensity distributions produced by the incoherent optical system have been modified into a required com...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-12, Vol.1124 (5), p.51003
Main Authors: Kumar Reddy, Andra Naresh, Butt, M.A., Khonina, S.N.
Format: Article
Language:English
Subjects:
Apodization
Defocusing
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Summary:We have investigated the resolution of the two overlapping point sources produced by the defocused incoherent system. By employing the quadratic amplitude filter in the pupil plane, the resultant intensity distributions produced by the incoherent optical system have been modified into a required component, while two-point sources are separated by the distance less than that of the diffraction limit and a comparison between them has been made by analyzing the position of the central dip in the curves. The results of the study indicate that, the apodization mask produces a higher spatial frequency under the Rayleigh limit, which means that the resolution limit is improved.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1124/5/051003