نتایج جستجو برای: refractive surfaces
تعداد نتایج: 150251 فیلتر نتایج به سال:
purpose: to evaluate visual outcomes after deep anterior lamellar keratoplasty (dalk) in patients with keratoconus. methods: in this interventional case series, patients with moderate to advanced keratoconus underwent dalk. inclusion criteria consisted of contact lens intolerance or poor spectacle-corrected visual acuity. dalk was performed using the big-bubble technique introduced by anwar and...
This paper investigates the potential of a new integrated solar concentrated photovoltaic (CPV) system that uses solo point focus Fresnel lens for multiple multi-junction cells (MJSCs). The proposed comprises an FL concentrator as primary optical element, multi-leg homogeniser secondary element (SOE), plano-concave lens, and four MJSCs. A three-dimensional model this was developed using ray tra...
The surface modified hydrophilic zinc sulfide nano powder was prepared by hydrothermal method, and the corresponding sulfide/polyurethane organic-inorganic composite transparent coating via in-situ polymerization. structure of ZnS Nanoparticles were characterized Infrared Spectroscopy, X-Ray Diffraction, Laser Particle Size Analyzer Scanning Electron Microscopy. optical properties measured Ultr...
Background and Aim: Vision improvement and reduction of refractive errors are considered as important goals of cataract surgery. The purpose of this study was to evaluate residual refractive errors after cataract surgery in the patients with senile cataract in Shahid Rahimi Hospital in Khorramabad City between 2017 and 2018. Material and Methods: This cross-sectional study included 178 patients...
Integrating nanostructured silicon materials with aqueous biological systems requires a suitable chemical passivation that can be controlled in a reproducible fashion. Herein, we investigate in detail a facile method to control both the stability of a porous silicon rugate filter and the degree to which the material can be functionalized with biological molecules. Hydrosilylation of neat and di...
1. Laboratório de Helmintoses Intestinais do Centro de Pesquisas René Rachou da Fundação Oswaldo Cruz, Belo Horizonte, MG, Brasil. 2. Departamento de Patologia do Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro, RJ, Brasil. Apoio financeiro: PAPES 2/FIOCRUZ. Endereço para correspondência: Dr. Omar S. Carvalho. Centro de Pesquisas René Rachou/FIOCRUZ. Av. Augusto de Lima 1715, Barro Preto, 30190-...
Dispersion, as the characteristic variation of refractive index with wavelength, is more pronounced, where the wavelength is approaching to the absorption band. In ultra-optical glasses, the nonlinear refractive index, concerning to the light intensity dependent phenomenon, becomes considerable. Here, two ultra-optical property glass systems; TiO2-Bi2O3-PbO (TBP...
Background & Objectives: To determine the prevalence rates of refractive errors in Mashhad, Iran Methods: In this population-based study, random cluster sampling was performed on the urban population of Mashhad and of 4453 selected individuals, 70.4% participated in the study. Refractive errors were assessed using cycloplegic refraction in participants who were ≤ 15 years of age and non-cycl...
In this article, the eigenvalues of the sound equation are used to determine the refractive index. This refractive index helps to extract the acoustic components of the material such as the speed of sound in the material. This will help in identifying targets, especially in the field of signal processing. For this purpose, a method has been extracted that can be used to establish a relation bet...
Grasping and manipulating transparent objects with a robot is challenge in vision. To successfully perform robotic grasping, 6D object pose estimation needed. However, are difficult to recognize because their appearance varies depending on the background, modern 3D sensors cannot collect reliable depth data surfaces due translucent, refractive, specular surfaces. address these challenges, we pr...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید