Results 41 to 50 of about 4,135,283 (192)

Improving the diffraction efficiency of structures in direct laser writing using obliquely incident beams: modeling and experiment

Компьютерная оптика, 2023
A brief review of methods for increasing the diffraction efficiency of optical elements synthesized by direct laser writing is done. It is noted that the previously proposed methods for recording the topology of similar elements using volumetric or ...
V.P. Kiryanov, N.A. Gurin
doaj   +1 more source

Analysis of the influence of antireflective coatings on the diffraction efficiency of diffractive optical elements

Optics Express, 2021
Diffractive optical elements (DOEs) may be used as a single optical component with dedicated functionality (e.g. focusing), or as one of the elements in complex hybrid optical systems to reduce the number of the elements and improve imaging quality. It is desirable to cover DOE’s
Grzegorz Fluder, Andrzej Kowalik, Anna Rojek, Artur Sobczyk, Zdzisław Choromański, Jerzy Krężel, Michał Józwik   +6 more
openaire   +2 more sources

Residual stress evolution analysis in AZ31 friction stir welds using X-Ray and neutron diffraction [PDF]

, 2009
This work was performed as a part of AEROMAG Project"Aeronautica lApplication of Wrought Magnesium" (project N°AST4-CT-2005 -516152) which was supported by the European Union.The authors wish to thank EADS-I W F, Suresnes for Friction Stir Welding,Robert
COMMIN, Loreleï, MASSE, Jean-Eric, BARRALLIER, Laurent   +2 more
core  

Diffraction Focal Position and Vector Diffraction Theory for Micro Holographic Storage Systems

Applied Sciences, 2014
In this study, we proposed a method to determine the optimal focal position for micro-holographic storage systems, using vector diffraction theory; the theory provides exact solutions when the numerical aperture (NA) exceeds 0.6.
Cheol-Ki Min, Hyungbae Moon, Do-Hyung Kim, No-Cheol Park, Kyoung-Su Park, Young-Pil Park   +5 more
doaj   +1 more source

Optical Design of a Slitless Astronomical Spectrograph with a Composite Holographic Grism

Photonics, 2023
In the present work, we consider an optical design of a slitless spectrograph for an existing 0.5 m-class telescope. This design concept has a number of advantages such as compact size, simplicity, and simultaneous coverage of a large field of view.
Eduard Muslimov, Damir Akhmetov, Danila Kharitonov, Erik Ibatullin, Nadezhda Pavlycheva, Vyacheslav Sasyuk, Sergey Golovkin   +6 more
doaj   +1 more source

Fabrication and characterization of a full-size ultra-precise lamellar grating for the Cosmic beamline at ALS-U

Journal of Synchrotron Radiation
We have developed a new process for the production of ultra-precise variable line spacing (VLS) lamellar diffraction gratings through nanofabrication. The process enables the fabrication of full-size X-ray gratings with sub-nanometre accuracy in groove ...
Dmitriy Voronov, Sooyeon Park, Lei Huang, Antoine Islegen-Wojdyla, Eric Gullikson, Howard Padmore, Tianyi Wang, Mourad Idir   +7 more
doaj   +1 more source

Gelatin as a Photosensitive Material

Molecules, 2018
Because this issue journal is dedicated to Gelatin, here we present a few applications of gelatin in the field of optics. Optics is the science that studies the production, propagation, interaction and detection of light.
Sergio Calixto, Nina Ganzherli, Sergey Gulyaev, Susana Figueroa-Gerstenmaier   +3 more
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Energy efficiency of a new trifocal intraocular lens [PDF]

Journal of the European Optical Society-Rapid Publications, 2014
The light distribution among the far, intermediate and near foci of a new trifocal intraocular lens (IOL) is experimentally determined, as a function of the pupil size, from image analysis. The concept of focus energy efficiency is introduced because, in
Vega F., Alba-Bueno F., Millán M. S.
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Methodology for determining temperature dependences of the diffraction efficiency of two-layer two-relief microstructures in the framework of a rigorous coupled-wave analysis

Компьютерная оптика
Aiming to calculate the diffraction efficiency of diffractive optical elements with a two-layer microstructure and two internal sawtooth reliefs within the framework of the rigorous electromagnetic theory of diffraction, we propose an approach that ...
A.I. Antonov, G.I. Greisukh
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Characterization of Polarization Holographic Gratings Obtained on Azopolymer Thin Films by Digital Holographic Microscopy

Journal of Biomedical Photonics & Engineering, 2021
Polarization diffraction gratings are formed by one-step polarization holographic recording in azopolymer thin films. The evolution of the gratings parameters, such as the modulation of diffraction efficiency and relief depth with regard to different ...
Veronica Cazac, Constantin Loshmanschii, Elena Achimova, Alexei Meshalkin, Vladimir Abashkin, Vladimir Podlipnov   +5 more
doaj   +1 more source