Design of efficient lightpipes for illumination by an analytical approach

Anurag Gupta, Junwon Lee, R. John Koshel

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


We present the concept of principal sections of a lightpipe to analyze the propagation of light through the lightpipe by total internal reflection. Only the principal sections determine the acceptance angle and thus help in the identification of regions where the leakage occurs first. Use of principal sections for analysis leads to a significant reduction in the design effort. We present an analysis of several commonly used lightpipe configurations, e.g., straight and single circular bend, and different cross sections, e.g., elliptical and rectangular. This analysis leads to the maximization of throughput and transfer efficiency. The uniformity characteristics of elementary configurations and scaling factors for a lightpipe with a single circular bend are also discussed.

Original languageEnglish (US)
Pages (from-to)3640-3648
Number of pages9
JournalApplied optics
Issue number22
StatePublished - Aug 1 2001

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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