Cell compaction is not required for the development of gradient refractive index profiles in the embryonic chick lens.
Sign Up to like & getrecommendations! 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… read more here.
Keywords: gradient refractive; grin; eye; development ... See more keywords
Further study of coupling efficiency of ultra-small gradient-index fiber probe
Sign Up to like & getrecommendations! 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… read more here.
Keywords: grin; distance; ultra small; coupling efficiency ... See more keywords
An Analytical Inverse Approach to Design GRIN Lenses
Sign Up to like & getrecommendations! 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… read more here.
Keywords: inverse approach; method; approach design; analytical inverse ... See more keywords
Dual-step method to manufacture a polymeric GRIN lens with a high refractive index range.
Sign Up to like & getrecommendations! 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… read more here.
Keywords: grin; refractive index; index; method ... See more keywords
Analytical ray transfer matrix for the crystalline lens.
Sign Up to like & getrecommendations! 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… read more here.
Keywords: matrix; lens power; ray transfer; grin ... See more keywords
Electrically tunable gradient-index lenses via nematic liquid crystals with a method of spatially extended phase distribution.
Sign Up to like & getrecommendations! 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… read more here.
Keywords: electrically tunable; grin lens; liquid; via nematic ... See more keywords
Mechanically loaded GRIN lens for endoscopy.
Sign Up to like & getrecommendations! 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… read more here.
Keywords: mechanically loaded; grin; lens endoscopy; loaded grin ... See more keywords
Replacing optical surfaces with gradient index functions which preserve ray trajectory.
Sign Up to like & getrecommendations! 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… read more here.
Keywords: index; optical surfaces; replacing optical; gradient index ... See more keywords