Linear Fresnel lenses, their design and use

Nábělek, B.; Malý, Miroslav; Jirka, V.

doi:10.1016/0960-1481(91)90049-u

Cited by 12 publications

(3 citation statements)

References 1 publication

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“…The design of a partition dielectric lens, with relative permittivity of 2, is shown in Figure 6. The partition lens is designed based on Fermat's Aplanatic principle and Fresnel law of refraction [14,15]. The design contour of each layer is determined from the following equation…”

Section: Analytical Model Of Partition Lens Systemmentioning

confidence: 99%

Design of Compact Lens System for Miniaturized Prolate Spheroidal Impulse Radiating Antenna for Skin Cancer Treatment

Petrishia¹

2018

PIER M

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Cancer treatment is one of the several new applications which use subnanosecond pulse and picosecond high voltage pulse. In particular, picosecond pulses can introduce important non-thermal changes in cell biology, especially the permeabilization of the cell membrane. The Prolate Spheroidal Impulse Radiating Antenna (PSIRA) is used to radiate very fast pulses in a narrow beam width with low dispersion and high field amplitude. The beamwidth of the radiated pulse is further reduced by using near field focusing lens. In this proposed work, the compact partition lens system is designed for miniaturized PSIRA to focus the radiated impulse to the target (skin) location. The near field focusing lens is used to enhance the resolution on the target location. The PSR with Modified Bicone Antenna (MBA) with lens configuration provides greatly reduced spot size. The spot size on the target (skin) is measured as 3 mm along the lateral direction and 6 mm along axial direction.

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Section: Analytical Model Of Partition Lens Systemmentioning

confidence: 99%

Design of Compact Lens System for Miniaturized Prolate Spheroidal Impulse Radiating Antenna for Skin Cancer Treatment

Petrishia¹

2018

PIER M

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“…This can be defined as the amount of radiation that will reach the solar cells at the exit aperture/absorber after concentration, or the ratio between the intensity of rays incident on the absorber to that of rays incident on a plane having the same area and same orientation located outside the concentrator. It can be expressed as the geometrical concentration multiplied by the optical efficiency as shown in equation (2). = × η (2) Where: Ce is the effective concentration ratio, Cg is the geometrical concentration ratio, and ηo is the optical efficiency of the solar concentrating system.…”

Section: Optical Modelling Approachmentioning

confidence: 99%

“…A considerable volume of research on high and medium concentration PV has been undertaken over the past few decades. Most research has attempted to improve the optical performance, seeking to obtain uniform solar radiation intensities on cell surfaces to maintain cell efficiency [2][3][4]. Complementary research has investigated their thermal behaviour [5].…”

Section: Introductionmentioning

confidence: 99%

Smart solar concentrators for building integrated photovoltaic façades

Connelly

Liu

et al. 2016

Solar Energy

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Abstract:In this study a novel static concentrating photovoltaics (PV) system, suitable for use in windows or glazing façades, has been designed. The developed smart Concentrating PV (CPV) system is lightweight, low cost and able to generate electricity. Additionally, this system automatically responds to climate by varying the balance of electricity generated from the PV with the amount of solar light and heat permitted through it into the building. It therefore offers the potential to contribute to, and control, energy consumption within buildings. A comprehensive optical analysis of the smart CPV is undertaken via 3-D ray tracing technique. To obtain optimal overall optical performance of the novel smart CPV, analysis has been based upon all necessary design parameters including the average reflectivity of the thermotropic reflective layer, the glazing cover dimension, the glazing cover materials as well as the dimensions of the solar cells. In addition, a hydroxypropyl cellulose (HPC) hydrogel polymer, suitable for use as the reflective thermotropic layer for the smart CPV system, was synthesized and experimentally studied.

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High solar energy concentration with a Fresnel lens

Sierra

Vázquez

2005

J Mater Sci

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Linear Fresnel lenses, their design and use

Cited by 12 publications

References 1 publication

Design of Compact Lens System for Miniaturized Prolate Spheroidal Impulse Radiating Antenna for Skin Cancer Treatment

Design of Compact Lens System for Miniaturized Prolate Spheroidal Impulse Radiating Antenna for Skin Cancer Treatment

Smart solar concentrators for building integrated photovoltaic façades

High solar energy concentration with a Fresnel lens

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