Share Email Print
cover

Proceedings Paper

Efficient calculation of luminance variation of a luminaire that uses LED light sources
Author(s): Peter Goldstein
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

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.

Paper Details

Date Published: 14 September 2007
PDF: 10 pages
Proc. SPIE 6669, Seventh International Conference on Solid State Lighting, 666907 (14 September 2007); doi: 10.1117/12.730351
Show Author Affiliations
Peter Goldstein, Dialight Corp. (United States)


Published in SPIE Proceedings Vol. 6669:
Seventh International Conference on Solid State Lighting
Ian T. Ferguson; Nadarajah Narendran; Tsunemasa Taguchi; Ian E. Ashdown, Editor(s)

© SPIE. Terms of Use
Back to Top