• Super-resolution by pupil plane phase filtering

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      https://www.ias.ac.in/article/fulltext/pram/075/05/0855-0867

    • Keywords

       

      Super-resolution; high-resolution imaging; pupil plane filtering; phase filters; global optimization; evolutionary programming; genetic algorithm.

    • Abstract

       

      Resolution capability of any optical imaging system is limited by residual aberrations as well as diffraction effects. Overcoming this fundamental limit is called super-resolution. Several new paradigms for super-resolution in optical systems use ‘a posteriori’ digital image processing. In these ventures the three-dimensional point spread function (PSF) of the lens plays a key role in image acquisition. A straightforward tailoring of the PSF can be performed by appropriate pupil plane filtering. With a brief review of the state-of-art in this research area, this paper dwells upon the inverse problem of global optimization of the pupil function by phase filtering in accordance with the desired PSF.

    • Author Affiliations

       

      L N Hazra1 N Reza1

      1. Department of Applied Optics and Photonics, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India
    • Dates

       
  • Pramana – Journal of Physics | News

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