Design and Fabrication of Fresnel Lenses Array

2021 ◽  
Author(s):  
Mihai Kusko ◽  
Andrei Avram
Keyword(s):  
Fresnel Lenses

Highly Efficient Dual-Fiber Optical Trapping with 3D Printed Diffractive Fresnel Lenses

ACS Photonics ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 88-97 ◽  
Author(s):  
Asa Asadollahbaik ◽  
Simon Thiele ◽  
Ksenia Weber ◽  
Aashutosh Kumar ◽  
Johannes Drozella ◽  
...  
Keyword(s):  
Optical Trapping ◽  
Highly Efficient ◽  
Fiber Optical ◽  
Fresnel Lenses ◽  
3D Printed

Amplitude apodizers encoded onto Fresnel lenses implemented on a phase-only spatial light modulator

2001 ◽  
Vol 40 (14) ◽  
pp. 2316 ◽  
Author(s):  
Andrés Márquez ◽  
Claudio Iemmi ◽  
Juan C. Escalera ◽  
Juan Campos ◽  
Silvia Ledesma ◽  
...  
Keyword(s):  
Spatial Light Modulator ◽  
Light Modulator ◽  
Fresnel Lenses

USES AND MANUFACTURE OF FRESNEL LENSES

1990 ◽  
Vol 8 (4) ◽  
pp. 221-226 ◽  
Author(s):  
T. NAKAMURA
Keyword(s):  
Fresnel Lenses

A Novel High Concentration Fresnel Lens as a Solar Concentrator

2021 ◽  
pp. 1-29
Author(s):  
Kuldeep Awasthi ◽  
Desireddy Shashidhar Reddy ◽  
Mohd. Kaleem Khan
Keyword(s):  
Optical Axis ◽  
Spherical Aberration ◽  
Spherical Surface ◽  
Fresnel Lens ◽  
High Concentration ◽  
Aperture Diameter ◽  
Convex Lens ◽  
Flat Base ◽  
Fresnel Lenses ◽  
Outer Vertex

Abstract This paper describes the design methodology for a novel Fresnel lens. The original Fresnel lens is obtained from a plano-convex lens, whose spherical surface is split into a number of divisions (called facets), collapsed onto the flat base. Thus, all the facets of the original Fresnel lens have the same radius as that of the plano-convex lens. The proposed design aims to achieve better ray concentration and reduced spherical aberration than the original Fresnel lens by constructing spherical facets with unequal radii. The centers and radii of facets are constrained so that the ray refracted from the bottom vertex of each facet on one side of the optical axis and the ray refracted from the outer vertex of the corresponding facet on the other side of the optical axis must intersect at the focal plane. The proposed lens design has resulted in a 275% gain in the concentration ratio and a 72.5% reduction in the spherical aberration compared to the original lens of the same aperture diameter and number of facets. The performance of both novel and original Fresnel lenses when used as solar concentrators with a conical coil receiver is evaluated. The novel Fresnel lens led to increased heat gain and resulted in a compact solar collector design.

FIB Precise Prototyping and Simulation

2006 ◽  
Vol 960 ◽  
Author(s):  
Philipp M. Nellen ◽  
Victor Callegari ◽  
Juergen Hofmann ◽  
Elmar Platzgummer ◽  
Christof Klein
Keyword(s):  
High Precision ◽  
Ion Beam ◽  
Ion Beams ◽  
Focused Ion Beams ◽  
Fresnel Lenses ◽  
Closed Approach ◽  
Physical Effects

ABSTRACTWe present a closed approach towards direct microstructuring and high precision prototyping with focused ion beams (FIB). The approach uses the simulation of the involved physical effects and the modeling of geometry/topography during milling while the ion beam is steered over the surface. Experimental examples are given including the milling of single spots, trenches, rectangles, and Fresnel lenses. Good agreements between simulations and experiments were obtained. The developed procedures can also be applied to other FIB prototyping examples.

scholarly journals The effectiveness of a mini photovoltaic cell by using light LED bulbs as a source of photon energy

2021 ◽  
Vol 926 (1) ◽  
pp. 012090
Author(s):  
Mustofa ◽  
Iskandar ◽  
Muchsin ◽  
S Suluh ◽  
T M Kamaludin
Keyword(s):  
Energy Source ◽  
Output Power ◽  
Electrical Energy ◽  
Photovoltaic Cell ◽  
Fresnel Lens ◽  
Test Results ◽  
Light Spectrum ◽  
Pv Cell ◽  
Fresnel Lenses ◽  
Cell Module

Abstract Muxindo’s LED bulb is one of the brands that are widely used by Indonesian people as lighting in the home. This study aims to look at the effectiveness of the light spectrum of the 10, 15 and 20 Watt LED power bulbs as an energy source to generate electrical energy in monocrystalline mini photovoltaic (PV) cell module. The light spectrum is compared with and without the Fresnel lens before being transmitted to the PV surface. The test results show that the PV output power is much better with a Fresnel lens (4.06> 1.67) mW. The efficiency of PV with lens displays slightly different figures, 3.77% at 15 Watt bulb power, while without Fresnel lenses, PV efficiency is 4.86% with a 20 Watt bulb. Need further research, for example, with Philips brand LED bulbs

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