Results 21 to 30 of about 619,306 (307)
Optics Express, 2007 In this paper we present a new kind of kinoform lenses in which the phase distribution is characterized by the "devil's staircase" function. The focusing properties of these fractal DOEs coined devil's lenses (DLs) are analytically studied and compared with conventional Fresnel kinoform lenses.
Juan A, Monsoriu +3 more
openaire +2 more sources
Microfabricated rubber microscope using soft solid immersion lenses [PDF]
, 2006 We show here a technique of soft lithography to microfabricate efficient solid immersion lenses (SIL) out of rubber elastomers. The light collection efficiency of a lens system is described by its numerical aperture (NA), and is critical for applications
Gambin, Yann +2 more
core +1 more source
Is it a coloboma or not? A new definition for isolated lens coloboma: focal zonular dysgenesis
The Pan-American Journal of Ophthalmology, 2023 Purpose: Ocular coloboma is defined as a congenital malformation caused by defective closure of the fetal fissure, resulting in a notch in any structure.
Nicole B Larivoir +5 more
doaj +1 more source
, 2006 The response of the ``perfect lens'', consisting of a slab of lossless material of thickness $d$ with $\epsilon=\mu=-1$ at one frequency $\omega_0$ is investigated.
Boardman +28 more
core +2 more sources
A Review of Smartphone Apps Used for Toric Intraocular Lens Calculation and Alignment
Vision, 2022 Smartphone apps are becoming increasingly popular in ophthalmology, one specific area of their application being toric intraocular lens (IOL) surgery for astigmatism correction.
Yarrow Scantling-Birch +3 more
doaj +1 more source
Finding Strong Gravitational Lenses in the Kilo Degree Survey with Convolutional Neural Networks [PDF]
, 2017 The volume of data that will be produced by new-generation surveys requires automatic classification methods to select and analyze sources. Indeed, this is the case for the search for strong gravitational lenses, where the population of the detectable ...
Chatterjee, S. +10 more
core +3 more sources
STRUCTURE AND DYNAMICS OF SEDIMENTATION OF PRODUCTIVE STRATUM BS10-11 IN THE SOUTH-YAGUNSK FIELD
Известия высших учебных заведений: Нефть и газ, 2015 The article presents the analysis of the results of the correlation of sections by twenty-three profiles located across the strike of the ancient coastline along the regression of Neocomian basin, i.e. in the latitudinal direction.
E. N. Funikova, K. A. Galinsky
doaj +1 more source
Photonics, 2021 This paper proposes the use of digital-grating moiré effect for measuring the focal lengths and radius of curvatures of biconvex and biconcave spherical simple lenses and spherical mirrors.
Chien-Yuan Han +5 more
doaj +1 more source
Microlens Parallax Asymmetries Toward the LMC [PDF]
, 1998 If the microlensing events now being detected toward the Large Magellanic Cloud (LMC) are due to lenses in the Milky Way halo, then the events should typically have asymmetries of order 1% due to parallax from the reflex motion of the Earth. By contrast,
Andrew Gould +6 more
core +3 more sources
Ophthalmology, 1987 Ophthalmology 94 (1987) 1355-1359.
Department of Ophthalmology, J. Hillis Miller Health Center, University of Florida, GainesvilleDepartment of OphthalmologyJ. Hillis Miller Health CenterUniversity of FloridaGainesville ( host institution ) +1 more
openaire +3 more sources