Title :
Emission characteristics of high power LEDs studied by confocal microscopy
Author :
Kuna, L. ; Sommer, C. ; Zinterl, E. ; Wenzl, F.P. ; Pachler, P. ; Hartmann, P. ; Tasch, S. ; Leising, G.
Author_Institution :
Joanneum Res. Forschungsges.mbH, Weiz
Abstract :
We have developed a method that allows us to measure the emission profiles of millimetre-sized high-power light emitting diodes with micron resolution. The optical cross-sections recorded provide detailed information on the light intensity distribution of LEDs within the substrate till a distance of several tens of millimetres, which can be used to map out strategies for an optimization of the power efficiency or the tailoring of the light distribution of high power LEDs.
Keywords :
light emitting diodes; optical microscopy; confocal microscopy; emission characteristics; high power LED; light emitting diodes; micron resolution; optical cross-sections; Apertures; Gallium nitride; Lenses; Light emitting diodes; Microscopy; Optical distortion; Optical recording; Photonics; Semiconductor device measurement; Stimulated emission;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0931-0
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4386197
