Flux propagation in light pipes: further development of the flux confinement diagram

John Felix Van Derlofske; Thomas Hough

doi:10.1117/12.560012

29 September 2004 Flux propagation in lightpipes: further development of the flux confinement diagram

Proceedings Volume 5529, Nonimaging Optics and Efficient Illumination Systems; (2004) https://doi.org/10.1117/12.560012
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

An analytical model of flux propagation in light pipes, termed the flux confinement diagram (FCD), is further developed and applied. The construction of the FCD is reviewed. Non-planar surface geometries, non-constant cross-sectional geometries, and non-rectangular cross sectional geometries are examined with the FCD. It is shown that in the limit of a circular cross section the predictions of the FCD match the theory for large core fibers. Additionally, the angular propagation space defined by the FCD is explored further to describe the redistribution of propagating flux after a sudden change in geometry, such as a bend. This analysis is used to explore total internal reflection (TIR) at light pipe output surfaces. The implications of analytical modeling with the FCD on light pipe design are discussed.

Citation Download Citation

John Felix Van Derlofske and Thomas Hough "Flux propagation in lightpipes: further development of the flux confinement diagram", Proc. SPIE 5529, Nonimaging Optics and Efficient Illumination Systems, (29 September 2004); https://doi.org/10.1117/12.560012

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