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Proceedings Paper

The hybrid coupling element for light-correcting in Natural Light Illumination Systems (NLIS)
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Paper Abstract

Sunlight is the most environmental-friendly energy. Through the Natural Light Illumination Systems (NLIS® ), we can guide sunlight indoors to use. However, due to the construction cost of the NLIS® , the most cost is spent on the optical fiber. Therefore we intend to design an element that can re-shape the beam from the SunLegoreg; to be narrower, where SunLego® is the building unit of NLIS® for light collection. The element consists of two functional optical structures: the first structure is to convert light from SunLego® to parallel beam, technically, is to convert stray light to parallel. We design the first structure based on free form principle. The second is a fan-shaped structure, which is to reduce the light transmission area , this design is based on the E'tendue principle. The reduction of area means we can use smaller fiber for later light transmission, which is crucial to reduce material cost.

Paper Details

Date Published: 25 March 2013
PDF: 7 pages
Proc. SPIE 8620, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II, 86201T (25 March 2013); doi: 10.1117/12.2003026
Show Author Affiliations
Allen Jong-Woei Whang, National Taiwan Univ. of Science and Technology (Taiwan)
Chang Ya Hui, National Taiwan Univ. of Science and Technology (Taiwan)
Lee Tsung-Xian, National Taiwan Univ. of Science and Technology (Taiwan)
Chen Yi Yung, National Taiwan Univ. of Science and Technology (Taiwan)


Published in SPIE Proceedings Vol. 8620:
Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II
Alexandre Freundlich; Jean-Francois Guillemoles, Editor(s)

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