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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S2 — Mar. 10, 2014
  • pp: A365–A375

Side-illuminating LED luminaires with accurate projection in high uniformity and high optical utilization factor for large-area field illumination

Yi-Chien Lo, Jhih-You Cai, Ming-Shiou Tasi, Zheng-Yu Tasi, and Ching-Cherng Sun  »View Author Affiliations


Optics Express, Vol. 22, Issue S2, pp. A365-A375 (2014)
http://dx.doi.org/10.1364/OE.22.00A365


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Abstract

A novel light luminaire is proposed and experimentally analyzed, which accurately projects light into a large rectangular area to achieve uniform illumination and a high optical utilization factor at the target. Side-illuminating luminaires for large-scale illuminated area are typically set with an elevated tilt angle to enlarge the illuminated area. However, the light pattern is bent thereby reducing the uniformity and optical utilization factor at the target. In this paper, we propose an efficient and useful approach with a rotationally symmetric projection lens that is trimmed to adjust the bending effect and to form a rectangular illumination light pattern on the ground. The design concept is demonstrated and verified. Several potential applications such as highly uniform illumination with fitting shapes for sport courts are analyzed and discussed.

© 2014 Optical Society of America

OCIS Codes
(150.2950) Machine vision : Illumination
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.3670) Optical devices : Light-emitting diodes
(150.2945) Machine vision : Illumination design
(080.4295) Geometric optics : Nonimaging optical systems

ToC Category:
Illumination Design

History
Original Manuscript: December 20, 2013
Revised Manuscript: February 5, 2014
Manuscript Accepted: February 5, 2014
Published: February 18, 2014

Citation
Yi-Chien Lo, Jhih-You Cai, Ming-Shiou Tasi, Zheng-Yu Tasi, and Ching-Cherng Sun, "Side-illuminating LED luminaires with accurate projection in high uniformity and high optical utilization factor for large-area field illumination," Opt. Express 22, A365-A375 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-S2-A365


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