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Published in 2020 at "Experimental eye research"
DOI: 10.1016/j.exer.2020.108112
Abstract: The development of the eye requires the co-ordinated integration of optical and neural elements to create a system with requisite optics for the given animal. The eye lens has a lamellar structure with gradually varying…
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Keywords:
gradient refractive;
grin;
eye;
development ... See more keywords
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Published in 2019 at "Optik"
DOI: 10.1016/j.ijleo.2019.03.018
Abstract: Abstract In this paper, the relationship between the coupling efficiency and transmission distance of different fiber optic probes is compared for further studying the focusing performance of ultra-small GRIN fiber probes. Taking an example of…
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Keywords:
grin;
distance;
ultra small;
coupling efficiency ... See more keywords
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1
Published in 2018 at "Acoustical Physics"
DOI: 10.1134/s1063771018060131
Abstract: An analytical inverse method to design lenses of isotropic inhomogeneous refractive index (RI) distribution is presented, where the wave ray propagation is described by the eikonal equation. We show that some particular RI distributions can…
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Keywords:
inverse approach;
method;
approach design;
analytical inverse ... See more keywords
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Published in 2021 at "Applied optics"
DOI: 10.1364/ao.439888
Abstract: We introduce a new method to obtain gradient index (GRIN) lenses by dual-step process based on interdiffusion of two different polymeric solutions and gelation of the final mixture. The aim of the study was investigated…
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Keywords:
grin;
refractive index;
index;
method ... See more keywords
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2
Published in 2022 at "Biomedical optics express"
DOI: 10.1364/boe.466374
Abstract: We present the formulation of a paraxial ray transfer or ABCD matrix for onion-type GRIN lenses. In GRIN lenses, each iso-indicial surface (IIS) can be considered a refracting optical surface. If each IIS is a…
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Keywords:
matrix;
lens power;
ray transfer;
grin ... See more keywords
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Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.032398
Abstract: The dilemma between tunable range of a lens power and an aperture size in gradient-index (GRIN) type of liquid crystal (LC) lenses is well known due to the limitation of birefringence of LC martials and…
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Keywords:
electrically tunable;
grin lens;
liquid;
via nematic ... See more keywords
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2
Published in 2023 at "Optics express"
DOI: 10.1364/oe.485554
Abstract: Endoscopic techniques are broadly used in medicine. Small diameter endoscopes are either made as fiber bundles or, beneficially, as graded index lenses. Fiber bundles can withstand a mechanical load during their use but the GRIN…
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Keywords:
mechanically loaded;
grin;
lens endoscopy;
loaded grin ... See more keywords
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1
Published in 2022 at "Optics letters"
DOI: 10.1364/ol.449210
Abstract: Laws of reflection and refraction between homogeneous media and gradient index (GRIN) ray behavior are both derived from Fermat's principle. Design methods for GRIN can be difficult to analytically develop. This Letter proposes a foundation…
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Keywords:
index;
optical surfaces;
replacing optical;
gradient index ... See more keywords