Results 31 to 40 of about 655,925 (308)
Development of Powerhouse Using Fresnel lens
MATEC Web of Conferences, 2018 Solar energy is an alternative source of renewable energy. Sultanate of Oman government showed initiation on utilization of solar energy for domestic and industrial applications.
Al-Dohani Nawar Saif +3 more
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Achromatic polymer-dispersed liquid crystal lens with diffractive–refractive hybrid structure
Materials Research Express, 2023 The focal length of liquid crystal Fresnel lens is electrically controllable, but the disadvantage is the chromatic aberration is obvious. In this paper, the electrically controlled zoom characteristics of liquid crystal lens and the basic theory of ...
Binming Liang, Jing An, Xin Su
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Analysis, Design and Fabrication of centimeter-wave Dielectric Fresnel Zone Plate Lens and reflector [PDF]
, 2005 Fresnel lens has a long history in optics. This concept at non-optical wavelengths is also applicable. In this paper we report design and fabrication of a half and quarter wave dielectric Fresnel lens made of Plexiglas, and a Fresnel reflector at 11.1 ...
A. Mahmoudi +11 more
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Detection of ultra-high energy cosmic ray showers with a single-pixel fluorescence telescope [PDF]
, 2015 We present a concept for large-area, low-cost detection of ultra-high energy cosmic rays (UHECRs) with a Fluorescence detector Array of Single-pixel Telescopes (FAST), addressing the requirements for the next generation of UHECR experiments.
Bertaina, M. +19 more
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A Swimming Goggles Optical Design by Fresnel Lenses
Engineering Proceedings, 2023 Currently, many swimming goggle lenses use optical plates to maintain zero refractive power in air and water. However, people’s widespread use of 3C products has increased myopia significantly, so lenses have a demand for refractive power.
Feng-Ming Yeh +6 more
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Chocolate Terahertz Fresnel Lens
Photonics Letters of Poland, 2020 Recent enormous development of 3D printing techniques gave the possibility of precise manufacturing of designed optical structures. This paper presents designing, manufacturing and the results obtained for chocolate Fresnel lens. Chocolate, similarly to wax, can be melted and used in the 3D printed form to create a terahertz (THz) optical element ...
Mateusz Surma +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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Multispectral Imaging with Fresnel Lens
, 2023 This paper presents a Multispectral imaging (MSI) approach that combines the use of a diffractive optical element, and a deep learning algorithm for spectral reconstruction. Traditional MSI techniques often face challenges such as high costs, compromised spatial or spectral resolution, or prolonged acquisition times. In contrast, our methodology uses a
Cohen, Khen, Kay, Tuval
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Performance Modeling of Fresnel-Based CPV Systems: Effects of Deformations under Real Operation Conditions [PDF]
, 2011 Getting a lower energy cost has always been a challenge for concentrated photovoltaic. The FK concentrator enhances the performance (efficiency, acceptance angle and manufacturing tolerances) of the conventional CPV system based on a Fresnel primary ...
Benitez Gimenez, Pablo +9 more
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Приборы и методы измерений, 2023 For widely used LED sources there is a sharp decrease in the illumination of the working plane from the center to the edge. The purpose of this study was to analyze the effectiveness of Fresnel lenses usage as a fairly simple and technological element to
P. S. Bogdan +4 more
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