scholarly journals Efficient Copper Reduction And Recycling By Fiber Optic Switching For Automotive Lighting Systems

2020 ◽  
Author(s):  
Suzanne Keilson ◽  
robert pond ◽  
william karasz ◽  
kyle bates ◽  
ryan christopher
Keyword(s):  
Fiber Optic ◽  
Automotive Lighting ◽  
Lighting Systems

A Thermal Model of a Fiber Optic Bundle for a Hybrid Solar Lighting System

2005 ◽  
Author(s):  
Michael J. Cheadle ◽  
Gregory F. Nellis ◽  
Sanford A. Klein ◽  
William A. Beckman
Keyword(s):  
Energy Consumption ◽  
Thermal Model ◽  
Fiber Optic ◽  
Management Strategies ◽  
Design Tool ◽  
Lighting Energy ◽  
Solar Lighting ◽  
Reduce Energy Consumption ◽  
Lighting Systems ◽  
Cooling Loads

Hybrid solar lighting (HSL) systems distribute natural sunlight to luminaires located in office or retail buildings in order to reduce energy consumption associated with conventional lighting systems. HSL systems reduce energy consumption directly by reducing the lighting energy and indirectly by reducing the associated cooling loads. A key component of the HSL system is the fiber optic bundle (FOB) that transmits the light from the collector to the luminaire. The observed thermal failure of the FOB when exposed to concentrated sunlight has motivated the development of a thermal model of this component. This paper describes the development of a predictive thermal model of the heat transfer in an FOB for an HSL system. The model is verified experimentally against temperature measurements obtained in the lab under controlled conditions and provides a powerful design tool that can be used to evaluate alternative thermal management strategies.

scholarly journals Preliminary Results on Luminaire Designs for Hybrid Solar Lighting Systems

2001 ◽  
Author(s):  
D. D. Earl ◽  
J. D. Muhs
Keyword(s):  
Intensity Distribution ◽  
Fiber Optic ◽  
High Angle ◽  
Optical Efficiency ◽  
Spatial Intensity Distribution ◽  
Spatial Intensity ◽  
Fluorescent Lamps ◽  
Solar Lighting ◽  
Lighting Systems ◽  
Two Hybrid

Abstract We report on the design of two hybrid lighting liminaires that blend light from a fiber optic end-emitted solar source with electric T8 fluorescent lamps. Both designs involve the retrofit of a commercially-available recessed fluorescent luminaire with minimal reductions in the original luminaire’s optical efficiency. Two methods for high-angle dispersion of fiber optic end-emitted solar light are described and the resulting spatial intensity distributions, simulated using ZEMAX, are compared with standard cylindrical fluorescent tubes. Differences in spatial intensity distribution are qualitatively characterized and potential design improvements discussed.

Visibility of the phantom array effect according to luminance, chromaticity and geometry

2019 ◽  
Vol 52 (3) ◽  
pp. 377-388
Author(s):  
SW Park ◽  
C-S Lee ◽  
HR Kang ◽  
HS Pak ◽  
A Wilkins
Keyword(s):  
Light Source ◽  
Pulse Width Modulation ◽  
Light Emitting Diode ◽  
Field Of View ◽  
Light Sources ◽  
Experimental Conditions ◽  
Threshold Frequency ◽  
Automotive Lighting ◽  
Lighting Systems ◽  
Angular Field Of View

Light-emitting diode-based lighting systems are now applied in both general lighting and automotive lighting. Time-modulated control methods such as pulse width modulation are frequently applied as a dimming method. This paper presents the characteristics of the visibility of the phantom array effect according to luminance, chromaticity and angular field of view. The threshold frequency of the visibility of the phantom array increases in proportion to the logarithm of the luminance of the light source. As the angular field of view of the light source increases, the threshold frequency of the visibility of the array decreases exponentially over a range from 0.125° to 4° in our experimental conditions. The threshold frequency at which the array is visible depends on chromaticity at high light source modulation frequencies. When designing time-modulated light sources, our findings can be applied so as to minimize the phantom array effect.

Benefits of glass fibers in solar fiber optic lighting systems

2013 ◽  
Vol 52 (27) ◽  
pp. 6685 ◽  
Author(s):  
Tarja T. Volotinen ◽  
David H. S. Lingfors
Keyword(s):  
Fiber Optic ◽  
Glass Fibers ◽  
Lighting Systems

Soft- and Hardware for High-Definition Automotive Lighting Systems

2021 ◽  
Vol 16 (4) ◽  
pp. 50-53
Author(s):  
Steffen Seidt ◽  
Thomas Winz ◽  
Ralf Sondershaus ◽  
Ilona Rutkiewicz
Keyword(s):  
High Definition ◽  
Automotive Lighting ◽  
Lighting Systems ◽  
Soft And Hardware
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