Translator Disclaimer
14 September 2007 Efficient calculation of luminance variation of a luminaire that uses LED light sources
Author Affiliations +
Many luminaires have an array of LEDs that illuminate a lenslet-array diffuser in order to create the appearance of a single, extended source with a smooth luminance distribution. Designing such a system is challenging because luminance calculations for a lenslet array generally involve tracing millions of rays per LED, which is computationally intensive and time-consuming. This paper presents a technique for calculating an on-axis luminance distribution by tracing only one ray per LED per lenslet. A multiple-LED system is simulated with this method, and with Monte Carlo ray-tracing software for comparison. Accuracy improves, and computation time decreases by at least five orders of magnitude with this technique, which has applications in LED-based signage, displays, and general illumination.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter Goldstein "Efficient calculation of luminance variation of a luminaire that uses LED light sources", Proc. SPIE 6669, Seventh International Conference on Solid State Lighting, 666907 (14 September 2007);


Recent advances in mixing rods
Proceedings of SPIE (September 22 2008)
The design of a reading light system with RGB white...
Proceedings of SPIE (October 21 2004)
The art of making efficient illuminator design fun
Proceedings of SPIE (November 11 2003)
Radially symmetric freeform lens design for extended sources
Proceedings of SPIE (October 18 2012)
An investigation on the light uniformers based on liquid guide
Proceedings of SPIE (September 14 2005)

Back to Top