Results 51 to 60 of about 3,894,078 (297)

Optical schemes of spectrographs with a diffractive optical element in a converging beam [PDF]

Journal of the European Optical Society-Rapid Publications, 2015
Optical schemes of spectrographs based on transmission concave holographic gratings working in converging beams are considered. General description of the design techniques are provided. Each of them is supported by a certain example with calculation and
Muslimov E. R., Pavlycheva N. K.
doaj   +1 more source

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

Advanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich, Lenka Kunčická, Pavel Czernek, Zifan Wang   +3 more
wiley   +1 more source

Effects of random phase and amplitude errors in optical fiber Bragg gratings [PDF]

, 2000
This paper studies the influence of random phase and amplitude fabrication errors on the performance of optical filters based on fiber Bragg gratings (FBGs).
Feced, R., Zervas, M.N.
core   +1 more source

Super-Oscillating Diffractive Optical Spot Generators

Photonics
The prior discrete Fourier transform (PDFT) is applied to the design of super-oscillating diffractive optical elements with rotational symmetry. Numerical simulations of the filter response are used to demonstrate the potential of the PDFT-based approach,
Markus E. Testorf, Praneeth Gadamsetti, Paolo Batoni, Menelaos K. Poutous   +3 more
doaj   +1 more source

Density Measurement of Irradiated and Nonirradiated Zirconium Oxide by Ptychographic X‐Ray Computed Tomography (PXCT)

Advanced Engineering Materials, EarlyView.
Mass density governs the protective behavior of oxide layers on nuclear fuel cladding. Ptychographic X‐ray computed tomography measures zirconium oxide grown on Zircaloy‐4 under reactor and autoclave conditions, revealing nearly identical bulk densities of 5.1 ± 0.80 g cm−3.
Okan Yetik, Liliana I. Duarte, Malgorzata G. Makowska, Roland Brütsch, Andrej Bullemer, Ana Diaz, Mirko Holler, Andreas Menzel, Johannes Bertsch, Pavel Trtik   +9 more
wiley   +1 more source

Locally erasable couplers for optical device testing in silicon on insulator

, 2014
Wafer scale testing is critical to reducing production costs and increasing production yield. Here we report a method that allows testing of individual optical components within a complex optical integrated circuit.
Payne, D.N.R., Reed, G.T., Topley, R.P., Mashanovich, G. Z., Peacock, A.C., Mailis, S., Mashanovich, G.Z., Gardes, F. Y., Peacock, A. C., Martinez-Jimenez, G., Gardes, F.Y., Thomson, D. J., Payne, D. N. R., Reed, G. T., Topley, R., O'Faolain, L., Healy, N., Thomson, D.J.   +17 more
core   +1 more source

Enhancing the Optical Efficiency of Near-Eye Displays with Liquid Crystal Optics

Crystals, 2021
We demonstrate a light efficient virtual reality (VR) near-eye display (NED) design based on a directional display panel and a diffractive deflection film (DDF).
Tao Zhan, En-Lin Hsiang, Kun Li, Shin-Tson Wu   +3 more
doaj   +1 more source

The PRIMA Thesaurus for Materials Science and Engineering

Advanced Engineering Materials, EarlyView.
The PRIMA Thesaurus is a structured vocabulary designed to improve how materials science data is described and shared. Developed with input from multiple experts, it enables clear documentation of research workflows, data exchange, and reuse across platforms.
Rossella Aversa, Alexey Boubnov, Dario De Angelis, Catriona Eschke, Maximilian Kabbe, Felix Kraus, Mirco Panighel, Richard Thelen, Davide Valentinis   +8 more
wiley   +1 more source

Athermal design of refractive/diffractive hybrid infrared optical system

, 2017
Regarding the poor work conditions of military infrared optical instruments, there is usually a strong demand for athermalization and high resolution design.
Qu, Enshi (quenshi@163.com), Zhang, Wenfei, Jiang, Yanru, Wang, Jing, Qu, Enshi, Xie, Qingkun   +5 more
core   +1 more source

Application of a liquid crystal spatial light modulator to laser marking [PDF]

, 2011
Laser marking is demonstrated using a nanosecond (ns) pulse duration laser in combination with a liquid crystal spatial light modulator to generate two-dimensional patterns directly onto thin films and bulk metal surfaces.
Rainer J. Beck, Jonathan D. Shephard, Parry, Jonathan P., Hand, Duncan P.; id_orcid, Beck, Rainer J, Jonathan P. Parry, Duncan P. Hand, Shephard, Jonathan D.; id_orcid   +7 more
core   +1 more source