Results 51 to 60 of about 655,925 (308)
Micromachines, 2020 Femtosecond laser direct writing through two-photon polymerization has been widely used in precision fabrication of three-dimensional microstructures but is usually time consuming.
Linyu Yan +3 more
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LED Uniform Illumination Using Double Linear Fresnel Lenses for Energy Saving
Energies, 2017 We present a linear Fresnel lens design for light-emitting diode (LED) uniform illumination applications. The LED source is an array of LEDs. An array of collimating lens is applied to collimate output from the LED array.
Ngoc Hai Vu +2 more
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Environmental and Climate Technologies, 2022 In recent years, the demand for energy-efficient technological solutions in the building sector has risen significantly worldwide. The exploitation of phase change material as a medium for thermal energy storage in building envelopes has increased due to
Narbuts Jānis +5 more
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Energies, 2021 Since there are not standard configurations of the Concentrating Photovoltaic (CPV) systems, several types of optics are designed and analyzed. In this paper, the optical performances of a spherical mirror and a commonly used Fresnel lens of the same ...
Carlo Renno
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EnergiesConcentration of solar energy may be obtained by reflection, refraction, or a combination of the two. The collectors of a reflection system are designed to concentrate the sun’s rays onto a photovoltaic cell or steam tube.
F. Rashid +3 more
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Fresnel Interferometric Imager: ground-based prototype
, 2009 The Fresnel Interferometric Imager is a space-based astronomical telescope project yielding milli-arc second angular resolution and high contrast images with loose manufacturing constraints.
Baez +15 more
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Treatment of Color Filter Wastewater by Fresnel Lens Enhanced Solar Photo-Fenton Process
Advances in Materials Science and Engineering, 2012 Treatment of color filter wastewater using solar photo-Fenton process enhanced by high-concentrating Fresnel lens was investigated in this paper. Optimal reaction conditions based on response surface methodology (RSM) were established as under an initial
Wen-shiuh Kuo, Chia-ling Wu
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A manufacturable achromatic fresnel lens for CPV [PDF]
2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), 2016 The CPV industry has moved to very high concentration ratios (1000X or more) but the commonly used Fresnel lenses are limited to concentration ratios closer to 200X by chromatic aberration, leading manufacturers to turn to secondary optical elements, which increase cost and complexity.
Askins, Stephen Alex +6 more
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, 2020 The study to investigate the thermal performance of solar cooker using a spot Fresnel lens for concentrators of solar thermal energy is conducted. The main objectives of the present work are: a) to develop a new design of the cooking pot of solar cooker ...
Asrori Asrori +3 more
semanticscholar +1 more source
3D printed dielectric Fresnel lens [PDF]
2016 10th European Conference on Antennas and Propagation (EuCAP), 2016 This paper presents the design and fabrication of a zone plate Fresnel lens. 3D Printing is used for rapid prototyping this low-cost and light-weight lens to operate at 10 GHz. This lens is comprised of four different 3D printed dielectric zones to form phase compensation in a Fresnel lens.
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