Results 11 to 20 of about 655,925 (308)
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
Comparative analysis of the Fresnel lens and the kinoform lens [PDF]
Компьютерная оптика, 2018 Based on a unified approach in the ray approximation, the focusing properties of Fresnel lenses and kinoform lenses are considered and compared. Particular attention is paid to the energy efficiency, chromatic focal shift and resolving power of these ...
Grigoriy Greisukh +2 more
doaj +2 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
doaj +2 more sources
Energies, 2019 In this paper, we present a design and optical simulation of a novel linear Fresnel lens. The lens can be applied to a concentrator photovoltaic (CPV) system as a primary optical element (POE) to increase the concentration ratio and improve the ...
Thanh Tuan Pham +2 more
doaj +2 more sources
Acoustophoretic separation of airborne millimeter-size particles by a Fresnel lens. [PDF]
Sci Rep, 2017 Cicek A, Korozlu N, Adem Kaya O, Ulug B.
europepmc +3 more sources
Electrical Tuning of Fresnel Lens in Reflection [PDF]
ACS Photonics, 2021 Optical metasurfaces have been extensively investigated, demonstrating diverse and multiple functionalities with complete control over the transmitted and reflected fields.
Christopher Damgaard-Carstensen +3 more
semanticscholar +1 more source
A novel achromatic Fresnel lens for high concentrating photovoltaic systems [PDF]
, 2016 In this paper we present a novel manufacturing method to produce achromatic Fresnel lenses for photovoltaic application. These achromatic lenses are capable of reaching a concentration factor three times higher than that attained by a conventional ...
Guido Vallerotto +4 more
openalex +4 more sources
Miniature Fresnel LC Lens Performance [PDF]
Proceedings of the International Display Workshops, 2020 The performance of miniature, polymer-based Fresnel liquid crystal lenses is discussed, specifically the sensitivity for non-uniformities.
Cuypers, Dieter +2 more
openaire +1 more source
Efficient 38.8 W/m2 solar pumped laser with a Ce:Nd:YAG crystal and a Fresnel lens.
Optics Express, 2022 Herein, we report a significant improvement in solar-pumped laser collection efficiency based on end-side pumping a 6-mm-diameter 95-mm-length Ce:Nd:YAG/YAG grooved bonded crystal rod.
Zitao Cai +5 more
semanticscholar +1 more source