12 May 2015 Incoupling and outcoupling of light from a luminescent rod using a compound parabolic concentrator
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Abstract
Secondary optics that allow for the integration of a light-emitting diode (LED)-based luminescent light source into various étendue-limited applications—such as projection systems—are investigated. Using both simulations and experiments, we have shown that the optical efficacy of the luminescent light source can be increased using a collimator. A thorough analysis of the influence of the collimator’s refractive index on the optical outcoupling and luminance is investigated and it is shown that it is most optimal to use a refractive index of 1.5. The optimal shape of the collimator is equal to that of a compound parabolic concentrator. Experimental results show that by using a collimator, we can improve the amount of outcoupled light with a factor of 1.8 up to 2.1 depending on the used optical configuration of the LED-based luminescent light source.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Stijn Roelandt, Stijn Roelandt, Youri Meuret, Youri Meuret, Dick K. G. de Boer, Dick K. G. de Boer, Dominique Bruls, Dominique Bruls, Patrick Van De Voorde, Patrick Van De Voorde, Hugo Thienpont, Hugo Thienpont, } "Incoupling and outcoupling of light from a luminescent rod using a compound parabolic concentrator," Optical Engineering 54(5), 055101 (12 May 2015). https://doi.org/10.1117/1.OE.54.5.055101 . Submission:
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