نتایج جستجو برای: aspherical optics

تعداد نتایج: 34678  

2011
Jiaze Wu Changwen Zheng Xiaohui Hu Fanjiang Xu

A novel method is proposed to accurately simulate the peripheral vision under different visual perception. An accurate aspherical schematic eye model is firstly introduced to reasonably predict the anatomical and optical properties of the human eye. This eye model is composed of the Navarro schematic eye model with aspherical surfaces as a basic model, and a corresponding accommodation model, a...

2003
A. N. DRANISHNIKOV

We present sufficient conditions for the cohomology of a closed aspherical manifold to be proper Lipschitz in sense of Connes-Gromov-Moscovici [CGM]. The conditions are stated in terms of the Stone-Čech compactification of the universal cover of a manifold. We show that these conditions are formally weaker than the sufficient conditions for the Novikov conjecture given in [CP]. Also we show tha...

Journal: :IEEE Access 2023

Vehicular Visible light communication (VLC) technology has recently attracted much interest from researchers and scientists. This enables connectivity between vehicles infrastructures along the road by using vehicles’ headlights taillights as wireless transmitters. The reliability of vehicle-to-vehicle (V2V) VLC systems is affected several factors, such car mobility, optics system design, visib...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2013
Cristian E Gutiérrez

Given a three-dimensional surface G, not necessarily rotationally symmetric, and away from a point source, we design a surface F such that the lens sandwiched between the two surfaces refracts radiation into a given direction or into a given point. The surface F satisfies a system of first-order partial differential equations that can be solved in terms of G and the refractive indices of the me...

Journal: :بینا 0
محمدرضا روحانی mr rohani zahedan university of medical sciences, zahedan, iranزاهدان- میدان آزادی- بلوار شهید مطهری (بلوار فرودگاه)- بیمارستان فوق تخصصی چشم پزشکی الزهرا (س) سیامک دلفزا باهر s delfaza-baher zahedan university of medical sciences, zahedan, iranزاهدان- میدان آزادی- بلوار شهید مطهری (بلوار فرودگاه)- بیمارستان فوق تخصصی چشم پزشکی الزهرا (س) حمیدرضا برخورداری یزدی hr barkhordari-yazdi zahedan university of medical sciences, zahedan, iranزاهدان- میدان آزادی- بلوار شهید مطهری (بلوار فرودگاه)- بیمارستان فوق تخصصی چشم پزشکی الزهرا (س)

purpose: to compare aspheric and spherical hydrophilic intraocular lenses (iols) in terms of contrast sensitivity and visual acuity in photopic and mesopic conditions. methods: this triple-blind randomized clinical trial was performed on 40 eyes of 40 patients at al-zahra eye center, zahedan, iran. the eyes were randomized to standard phacoemulsification procedure with spherical (adapt, b&l;) o...

2001
Wim Malfait WIM MALFAIT

For a closed orientable surface S, any map f : S→S whose n-th power is homotopic to the identity, is homotopic to a homeomorphism g of S of order n. This famous theorem of Nielsen is known to fail in general for aspherical manifolds. In this paper, for model aspherical manifolds M associated to a finitely extendable set of data, we, however, present a weaker version of Nielsen’s result. We show...

1998
J. I. Katz

When an asymmetric bubble collapses it generally produces a well defined high velocity jet. This is remarkable because one might expect such a collapse to produce a complex or chaotic flow rather than an ordered one. I present a dimensional argument for the ubiquity of jets from collapsing bubbles, and model the aspherical collapse of a bubble with pieces of Rayleigh’s solution for spherical co...

Journal: :Physical review letters 2004
E A Goremychkin R Osborn E D Bauer M B Maple N A Frederick W M Yuhasz F M Woodward J W Lynn

The results of inelastic neutron scattering provide a solution for the crystal field level scheme in PrOs4Sb12, in which the ground state in the cubic crystal field potential of T(h) symmetry is a Gamma(1) singlet. The conduction electron mass enhancement is consistent with inelastic exchange scattering, and we propose that inelastic quadrupolar, or aspherical Coulomb, scattering is responsible...

Journal: :Journal of the Australian Mathematical Society 1973

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