Generalized nonimaging compound elliptical and compound hyperbolic luminaire designs for pair-overlap illumination

Olivier Georlette; Jeffrey M. Gordon

doi:10.1117/12.161944

1 November 1993 Generalized nonimaging compound elliptical and compound hyperbolic luminaire designs for pair-overlap illumination

Olivier Georlette, Jeffrey M. Gordon

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Proceedings Volume 2016, Nonimaging Optics: Maximum-Efficiency Light Transfer II; (1993) https://doi.org/10.1117/12.161944
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Generalized nonimaging Compound Elliptical Luminaires (CELs) and Compound Hyperbolic Luminaires (CHLs) are developed for pair-overlap illumination applications. A comprehensive analysis of CELs and CHLs is presented. This includes the possibility of reflector truncation, as well as the extreme direction spanning the full range from positive to negative. Negative extreme direction devices have been overlooked in earlier studies, and are shown to be well suited to illumination problems were large cutoff angles are required. Flux maps can be calculated analytically without the need for computer ray tracing. It is demonstrated that, for a broad range of cutoff angles, adjacent pairs of CELs and CHLs can generate highly uniform far-field illuminance, while maintaining maximal lighting efficiency and excellent glare control. The tradeoff between luminaire compactness and flux homogeneity is also illustrated. For V-troughs, being a special case of CHLs and being well suited to simple, inexpensive fabrication, we identify geometries that closely approach the performance characteristics of the optimized CELs and CHLs.

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Olivier Georlette and Jeffrey M. Gordon "Generalized nonimaging compound elliptical and compound hyperbolic luminaire designs for pair-overlap illumination", Proc. SPIE 2016, Nonimaging Optics: Maximum-Efficiency Light Transfer II, (1 November 1993); https://doi.org/10.1117/12.161944

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KEYWORDS

Reflectors

Light sources and illumination

Nonimaging optics

Ray tracing

Solar concentrators

Analytical research

Cesium

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