1 January 1994 Achieving uniform efficient illumination with multiple asymmetric compound parabolic luminaires
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Optical Engineering, 33(1), (1994). doi:10.1117/12.149154
Abstract
Luminaire designs based on multiple asymmetric nonimaging compound parabolic reflectors are proposed for 2-D illumination applications that require highly uniform far-field illuminance, while ensuring maximal lighting efficiency and sharp angular cutoffs. The new designs derive from recent advances in nonimaging secondary concentrators for line-focus solar collectors. The light source is not treated as a single entity, but rather is divided into two or more separate adjoining sources. An asymmetric compound parabolic luminaire is then designed around each half-source. Attaining sharp cutoffs requires relatively large reflectors. However, severe truncation of the reflectors renders these devices as compact as many conventional luminaires, at the penalty of a small fraction of the radiation being emitted outside the nominal cutoff. The configurations that maximize the uniformity of far-field illuminance offer significant improvements in flux homogeneity relative to alternative designs to date.
Jeffrey M. Gordon, Peter Kashin, "Achieving uniform efficient illumination with multiple asymmetric compound parabolic luminaires," Optical Engineering 33(1), (1 January 1994). http://dx.doi.org/10.1117/12.149154
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KEYWORDS
Reflectors

Light sources and illumination

Calcium

Geometrical optics

Nonimaging optics

Solar concentrators

Light

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