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
A Thermal Model for Predicting the Performance of a Solar Still with Fresnel Lens [PDF]
Water, 2019 This study presents a theoretical model to simulate the temperatures and productivity of a single-slope, single-basin solar still when an external solar enhancement is used. Experiments were performed in the New Mexico region (32.3199° N, 106.7637° W) to
Ana Johnson +7 more
openalex +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
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
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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Electrically Tunable Fresnel Lens in Twisted-Nematic Liquid Crystals Fabricated by a Sagnac Interferometer. [PDF]
Polymers (Basel), 2019 This paper presents an electrically tunable Fresnel lens in a twisted nematic liquid crystal cell fabricated by using a Sagnac interferometer. When the Fresnel-patterned green beam, formed by the Sagnac interferometer, is irradiated on the azo-dye doped ...
Huang BY, Lin TH, Jhuang TY, Kuo CT.
europepmc +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
Manufacturing Signatures of Injection Molding and Injection Compression Molding for Micro-Structured Polymer Fresnel Lens Production. [PDF]
Micromachines (Basel), 2018 Injection compression molding (ICM) provides enhanced optical performances of molded polymer optics in terms of birefringence and transmission of light compared to Injection molding (IM).
Loaldi D +5 more
europepmc +2 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