title: High-brightness source based on luminescent concentration.
abstract: The concept of a high-luminance light source based on luminescent conversion of LED light and optical concentration in a transparent phosphor is explained. Experiments on a realized light source show that a luminous flux of 8500 lm and a luminance of 500 cd/mm2can be attained using 56 pump LEDs at 330 W electrical input power. The measurement results are compared to optical simulations, showing that the experimental optical efficiency is slightly lower than expected. The present status enables applications like mid-segment digital projection using LED technology, whereas the concept is scalable to higher fluxes.
authors.forename: Dick K G
authors.initials: DK
authors.lastname: de Boer
authors.forename: Dominique
authors.initials: D
authors.lastname: Bruls
authors.forename: Henri
authors.initials: H
authors.lastname: Jagt