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Proceedings Paper

Light recycling characteristics of ultra-bright lamps
Author(s): Asher Malul; Doron Nakar; Daniel Feuermann; Jeffrey M. Gordon
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Paper Abstract

The brightness of many lamps, and hence the attainable power density at the target application, can be enhanced by recycling light back into the lamp's radiant zone. We report measurements of the effectiveness, spectral characteristics and modified plasma brightness maps that result from light recycling with a specular hemispherical mirror in commercial 150 W ultra-bright Xenon short-arc discharge lamps. Lamp brightness can be increased by up to 70% for certain spectral windows and plasma arc regions. However, lamp geometry reduces overall light recycling effectiveness to about half this value. This study was motivated by biomedical and high-flux furnace applications where the full spectrum of lamp emissions can be exploited, heightened brightness allows a broader range of procedures, and the design of the affiliated optical systems is contingent upon how plasma radiometric characteristics are altered by photon regeneration.

Paper Details

Date Published: 18 September 2007
PDF: 8 pages
Proc. SPIE 6670, Nonimaging Optics and Efficient Illumination Systems IV, 66700F (18 September 2007); doi: 10.1117/12.733105
Show Author Affiliations
Asher Malul, Ben-Gurion Univ. of the Negev (Israel)
Doron Nakar, Ben-Gurion Univ. of the Negev (Israel)
Daniel Feuermann, Ben-Gurion Univ. of the Negev (Israel)
Jeffrey M. Gordon, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 6670:
Nonimaging Optics and Efficient Illumination Systems IV
Roland Winston; R. John Koshel, Editor(s)

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