Results 11 to 20 of about 3,894,078 (297)

Spectral resolution of optical filters based on diffractive optical elements with non-uniform illumination [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2008
We study the transmission coefficient and the spectral resolution of optical filters based on a diffractive optical element (DOE), with a collimating lens, input and output fibers.
Angelskår Hallvard, Sudbø Aasmund S.
doaj   +3 more sources

Linearly modulated multi-focal diffractive lens for multi-sheet excitation of flow-driven samples in a light-sheet fluorescence microscope [PDF]

open access: yesEPJ Web of Conferences, 2022
Light-sheet fluorescence microscopy (LSFM) with single light-sheet illumination enables rapid 3Dimaging of living cells. In this paper we show the design, fabrication and characterization of a diffractive optical element producing several light sheets ...
Hofmann Meike   +5 more
doaj   +3 more sources

Tapered optical fibre sensors employing nanostructured coatings [PDF]

open access: yes, 2010
Tapered optical fibres have been manufactured, characterised and studied. These are compact devices made from single-mode optical fibre. A system for producing tapers has been developed, employing flame heating of the optical fibre and computer ...
Jarzebinska, Renata
core   +7 more sources

Polarization converter for higher-order laser beams based on the use of forming binary diffractive optical elements as beam splitter

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012
We propose a new approach to generating a pair of initial beams for a polarization converter that operates by summing up two opposite-sign circularly polarized beams.
S. V. Karpeev   +4 more
doaj   +3 more sources

Comparison of far field characterisation of DOEs with a goniometric DUV-scatterometer and a CCD-based system [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2011
We have measured far field diffraction patterns of different diffractive optical elements at an illumination wavelength of 193 nm using a new type of goniometric DUV (deep ultraviolet) scatterometer.
Wurm Matthias   +3 more
doaj   +1 more source

Multi-wavelength optical pickup with diffractive optical elements

open access: yes, 2022
S.2437-2453A novel, to our knowledge, multi-wavelength diffractive optical pickup is presented. The pickup enables multi-focus imaging and increases the data transfer rate considerably. Parallel reading of two or more memory layers is possible.
Pawlowski, E.   +5 more
core   +1 more source

High Concentration Photovoltaics (HCPV) with Diffractive Secondary Optical Elements

open access: yesPhotonics, 2019
Multi-junction solar cells can be economically viable for terrestrial applications when operated under concentrated illuminations. The optimal design of concentrator optics in high concentration photovoltaics (HCPV) systems is crucial for achieving high ...
Furkan E. Sahin, Musa Yılmaz
doaj   +1 more source

Nanooptical elements for visual verification

open access: yesScientific Reports, 2021
This paper focuses on the development of flat diffractive optical elements (DOEs) for protecting banknotes, documents, plastic cards, and securities against counterfeiting.
Alexander Goncharsky   +3 more
doaj   +1 more source

Selective modification of dual phase steel DP 1000 by laser action using diffractive optical element [PDF]

open access: yesКомпьютерная оптика, 2019
Experimental studies of shaping a CO2 laser beam with a reflective diffractive optical element have been performed. To increase the aperture of the initial beam, we used a collimator containing a system of two plane-convex spherical ZnSe lenses.
Serguei Murzin, Maksim Blokhin
doaj   +1 more source

Modern Types of Axicons: New Functions and Applications

open access: yesSensors, 2021
Axicon is a versatile optical element for forming a zero-order Bessel beam, including high-power laser radiation schemes. Nevertheless, it has drawbacks such as the produced beam’s parameters being dependent on a particular element, the output beam’s ...
Svetlana N. Khonina   +3 more
doaj   +1 more source

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