Results 21 to 30 of about 1,347 (193)
An Annular Fresnel Zone Plate without Central Spots Fabricated by Femtosecond Laser Direct Writing
Micromachines, 2022 In recent years, micro-annular beams have been widely used, which has expanded the possibilities for laser processing. However, the current method of generating an annular beam still has shortcomings, such as spot energy at the center of the produced ...
Xiaoyan Sun, Fang Zhou, Lian Duan
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On the Design of Soret Zone Plates Based on Binary Sequences Using Directional Transducers
Sensors, 2021 In this work, we analyze the effect of the distribution of transparent Fresnel regions over the focusing profile of Soret Zone Plates (SZP) based on binary sequences. It is shown that this effect becomes very significant in those fields where directional
Pilar Candelas +2 more
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Double-sided fresnel zone plates as high performance optics in X-ray microscopy [PDF]
, 2015 X-ray microscopy describes a range of analytical techniques, specialized for the characterization of organic and inorganic samples using high energy photons.
Mohácsi, István
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Optimized square Fresnel zone plates for microoptics applications [PDF]
, 2009 Conference on Modeling Aspects in Optical Metrology II, Munich, GERMANY, JUN 15-16, 2009Polygonal Fresnel zone plates with a low number of sides have deserved attention in micro and nanoptics, because they can be straightforwardly integrated in photonic ...
Rico García, José María +3 more
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Diffractive performance of square Fresnel zone plates [PDF]
, 2009 Esta es una versión preprint.We analyze the optical behavior of square Fresnel zones plates. A theoretical analysis and numerical simulations based on the Rayleigh-Sommerfeld approach have been developed analyzing properties such as the depth of focus ...
Rico García, José María +3 more
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Pinhole Zone Plate Lens for Ultrasound Focusing
Sensors, 2017 The focusing capabilities of a pinhole zone plate lens are presented and compared with those of a conventional Fresnel zone plate lens. The focusing properties are examined both experimentally and numerically.
Constanza Rubio +5 more
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GDS schemas of perturbed Fresnel zone plates [PDF]
, 2019 GDS schemas of the tested Fresnel zone plates that can be used in e-beam lithography to replicate our perturbated zone ...
Mirko Holler (1355967) +4 more
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Resolutions in Imaging with Fresnel Zone Plate
RADIOISOTOPES, 1978 A coarse Fresnel zone plate (FZP) may be used as a large-area coded aperture for imaging incoherent sources. The longitudinal and lateral spatial resolutions are discussed on the basis of experiment using an FZP having 18 or 19 zones as an aperture. In this paper, it is then shown that the lateral spatial resolution is about 5 mm and the longitudinal ...
ITAYA, Gensei, KOJIMA, Kazuhiko
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Design of Binary-Sequence Zone Plates in High Wavelength Domains
Sensors, 2018 The design of zone plates is an important topic in many areas of physics, such as optics, X-rays, microwaves or ultrasonics. In this paper, a zone plate design method, which provides high flexibility in the shaping of the focusing profile, is analyzed ...
José Miguel Fuster +3 more
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Компьютерная оптика, 2021 Binary Fresnel zone plates (ZP) are one of the most frequently used focusing elements of inplane optical schemes in micro- and nanophotonics. With a decrease in the diameter and focal distance of the ZP to meso-wavelength sizes, the parameters of the ...
Y.E. Geints +3 more
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