Fresnel Lens with Embedded Vortices [PDF]
International Journal of Optics, 2012 Vortices of different charges are embedded in a wavefront that has quadratic phase variation, and the intensity distribution near the focal plane is studied. This method may be useful in realizing complicated beam profiles.
Sunil Vyas +3 more
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Evolvable Acoustic Field Generated by a Transducer with 3D-Printed Fresnel Lens [PDF]
Micromachines, 2021 Evolvable acoustic fields are considered an effective method for solving technical problems related to fields such as biological imaging, particle manipulation, drug therapy and intervention.
Danfeng Wang +8 more
doaj +2 more sources
New Design Scheme for and Application of Fresnel Lens for Broadband Photonics Terahertz Communication [PDF]
SensorsIn terahertz communication systems, lens antennas used in transceivers are basically plano-convex dielectric lenses. The size of a plano-convex lens increases as the aperture increases, and thinner lenses have longer focal lengths.
Peng Tian +5 more
doaj +2 more sources
Pretreatment of Color Filter Wastewater towards Biodegradable by Fresnel-Lens-Assisted Solar TiO2 Photocatalysis [PDF]
International Journal of Photoenergy, 2012 The pretreatment of color filter wastewater towards biodegradable by Fresnel-lens-enhanced solar TiO2 photocatalytic process was investigated. The experimental design of response surface methodology (RSM) was employed to assess the effect of critical ...
Wen-Shiuh Kuo, Min-Tian Li
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An Improved 3D OPC Method for the Fabrication of High-Fidelity Micro Fresnel Lenses [PDF]
Micromachines, 2023 Based on three-dimensional optical proximity correction (3D OPC), recent advancements in 3D lithography have enabled the high-fidelity customization of 3D micro-optical elements.
Fei Peng +3 more
doaj +2 more sources
Stretchable Binary Fresnel Lens for Focus Tuning. [PDF]
Sci Rep, 2016 AbstractThis paper presents a tuneable binary amplitude Fresnel lens produced by wafer-level microfabrication. The Fresnel lens is fabricated by encapsulating lithographically defined vertically aligned carbon nanotube (CNT) bundles inside a polydimethyl-siloxane (PDMS) layer.
Li X +7 more
europepmc +6 more sources
Design of Fresnel Lens-Type Multi-Trapping Acoustic Tweezers [PDF]
Sensors, 2016 In this paper, acoustic tweezers which use beam forming performed by a Fresnel zone plate are proposed. The performance has been demonstrated by finite element analysis, including the acoustic intensity, acoustic pressure, acoustic potential energy ...
You-Lin Tu +2 more
doaj +2 more sources
Design and Structure of a Non-Coaxial Multi-Focal Composite Fresnel Acoustic Lens for Synergistic Ultrasound Stimulation of Multiple Brain Regions [PDF]
SensorsTranscranial focused ultrasound (TcFUS) neuromodulation is hindered by skull-induced acoustic limitations. To enable synergistic multi-region brain stimulation, we designed non-coaxial multi-focal composite Fresnel acoustic lenses, including an ...
Ruiqi Wu +6 more
doaj +2 more sources
A concentrator system for BI-CPVT with static linear Fresnel lenses [PDF]
, 2011 A greenhouse with Fresnel lenses in the south facing roof and a receiver for concentrated Photovoltaic with water cooling (CPVT system) will result in electrical and thermal energy output from the solar energy excess entering a greenhouse.
Janssen, H.J.J. +4 more
core +4 more sources
Four-Ce:Nd:YAG-rod solar laser with 4.49% conversion efficiency through Fresnel lens [PDF]
Scientific ReportsThe development of solar laser systems that combine high efficiency and cost-effectiveness is key to the practical implementation of this renewable technology. This paper presents the outcomes of the assessment of a solar laser prototype performed in the
Hugo Costa +4 more
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