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Aplanatic lens correctors for imaging optics
(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 ...
Radiative transfer of star formation and destruction regions
(NUI Galway, 2022-12-14)
While star formation and destruction may lie at the opposite ends of a star's life cycle, they display remarkable similarities. Both star forming regions and pre-planetary nebulae can be detected by observing molecular ...
Mechanical evaluation of ovine brain tissue using rheometry and shear wave ultrasound elastography
(NUI Galway, 2023-08-24)
The aim of this thesis is to measure the mechanical properties of brain
matter to aid clinical decisions in tissue resection. Brain tissue has proven
difficult to model in part due to its extreme softness, requiring ...
Analysis of EMCCD gain estimation techniques for use in astronomical instruments
(NUI Galway, 2023-09-14)
Electron-multiplied Charge Coupled Devices (EMCCDs) are used in many astro nomical instruments where they provide much improved signal to noise compared to
conventional CCDs. However, the gain provided by electron-multiplication ...
Carbonization of polyimide using CO2 laser and femtosecond laser for sensor applications
(NUI Galway, 2023-10-05)
Laser carbonization is the process of photothermal conversion of polymers rich in aromatic
carbons such as Polyimide (PI) into graphene, via a process called Laser Induced Graphene
(LIG) using a laser as the source of ...
Using spatial light modulators to investigate the limitations of adaptive optics performance for the European Extremely Large Telescope
(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 ...
Non-thermal crystallization and sintering of thin films and nanoparticles by using ultrashort laser technology
(NUI Galway, 2023-12-04)
Ultrashort laser pulses can have a transformative effect on materials processing,
enabling new processes which cannot be achieved with laser pulses of longer duration
or with other material processing technologies. ...
Gradient-index lenses: Symplectic ray tracing and optical testing
(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, ...