Browsing by Author "Goncharov, Alexander"

Now showing items 1-7 of 7

    • Aplanatic lens correctors for imaging optics 

      Rocha, Michelle Cristine (NUI Galway, 2022-09-05)
      This thesis proposes analytically developed aplanatic field correctors. To begin, an astigmatism correction method for aplanatic Gregorian telescopes was developed employing two lenses with spherical surfaces and a ...

    • Eye modelling for personalised intraocular lens design 

      Sheehan, Matthew (2012-08-03)
      Approximately 20 million cataract operations are performed per year worldwide, routinely removing the opaque cataractous lens and implanting an artificial intraocular lens (IOL). Modern technologies used to treat cataract ...

    • Gradient-index lenses: Symplectic ray tracing and optical testing 

      McKeon, Ben (NUI Galway, 2024-02-22)
      The chief objective of this thesis is to provide an introduction to symplectic numerical methods and how they may be applied to optical problems, particularly for tracing rays within gradientindex (GRIN) optics. Specifically, ...

    • On extending depth of field in fast photographic lenses 

      Fitzgerald, Niamh (NUI Galway, 2019-09-04)
      Modern smartphone cameras are equipped with multiple camera modules. These modules are typically five millimetres in length limiting the focal length of the lens. To preserve resolution the entrance pupil of these lenses ...

    • Polychromatic modelling of the human eye containing a GRIN lens 

      Coughlan, Mark (2017-12-01)
      The ingenuity and complexity of the human eye have attracted the interest of many researchers. In this thesis, we take a closer look at the polychromatic nature of the human eye, with special attention paid to the gradient ...

    • A review of resolution losses for AR/VR foveated imaging applications 

      Cognard, Timothee E.; Goncharov, Alexander; Devaney, Nicholas; Dainty, Chris; Corcoran, Peter (Institute of Electrical and Electronics Engineers, 2018-08-15)
      Foveated imaging is of great interest for Augmented and Virtual Reality applications. The resolution losses off-axis simulated in foveated imaging are modelled using cone density on the retina. This article reviews the ...

    • Using spatial light modulators to investigate the limitations of adaptive optics performance for the European Extremely Large Telescope 

      Malone, Deborah Catherina (NUI Galway, 2024-02-02)
      The European Extremely Large Telescope (E-ELT) will be the world’s largest ground based optical / near-infrared telescope ever built. Its primary mirror, M1, will be 39 m in diameter and consist of 798 individual hexagonal ...