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Design optimization of large-size format edge-lit light guide units
Hastanin, Juriy; Lenaerts, Cedric; Fleury-Frenette, Karl
2016In Proceedings of SPIE; SPIE 2016 Photonics Europe
 

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Keywords :
large-size edge-lit light guide unit; photo-bioreactor lighting; diffusing dot pattern optimization
Abstract :
[en] In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the maximum allowable number of optical objects supported by most common ray-tracing software. In the proposed method, in order to simplify the computational problem, an original optical system is replaced by an equivalent one. Accordingly, the original dot pattern is splitted into multiple small sections. Then, these sections are replaced by equivalent cells with continuous diffusing film. After that, we adjust the TIS (Total Integrated Scatter) two-dimensional distribution over the grid of equivalent cells, using an iterative optimization procedure. Finally, the obtained optimal TIS distribution is converted into the dot size distribution by applying an appropriate conversion rule. An original semi-empirical equation dedicated to rectangular large-size LGPs (Light Guide Plate) is proposed for the initial guess of the TIS distribution. It allows significantly reducing the time needed to dot pattern optimization.
Disciplines :
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Author, co-author :
Hastanin, Juriy ;  Université de Liège > CSL (Centre Spatial de Liège)
Lenaerts, Cedric ;  Université de Liège > CSL (Centre Spatial de Liège)
Fleury-Frenette, Karl ;  Université de Liège > CSL (Centre Spatial de Liège)
Language :
English
Title :
Design optimization of large-size format edge-lit light guide units
Publication date :
April 2016
Event name :
SPIE 2016 Photonics Europe
Event organizer :
SPIE
Event place :
Bruxelles, Belgium
Event date :
3-7 April 2016
Audience :
International
Main work title :
Proceedings of SPIE; SPIE 2016 Photonics Europe
Collection name :
Optical Modelling and Design
Funders :
DGTRE (Walloon Region Ministry - Directorate General for Technologies, Research and Energy)
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