Spectral Variability of Light-Emitting Diodes with Angle

Óscar Martínez1, Meritxell Vilaseca2, Carles Pizarro2, Èdgar Ferrer2, Monserrat Arjona2, Jaume Pujol2 1Hewlett-Packard España, 2Technical University of Catalonia, Spain Download paper Play (29min) Download: FLV | MOV | OGG | MP3

Multispectral systems allow the spectral characterization of the scene through several acquisition channels with different spectral features. The spectral sampling can be done by using transmittance filters and a white light source or illuminating the scene using light sources with different spectral emission characteristics. Light-emitting diodes based light sources have started to be used in multispectral systems, mainly to develop low-cost devices for the industry. In this study we analyze the spectral power distribution and color variability of white and single color light-emitting diodes relative to the viewing angle, and highlight some aspects that must be taken into account if these light sources want to be used in a multispectral system.

You may also like:

1. Exposure and Spectral Characteristics of Bulgarian Silver-halide Materials for Multicolor Holographic Recording
2. Chromatic Effects of Metamers of Daylights
3. Ink-Dependent n-Factors for the Yule-Nielsen Modified Spectral Neugebauer Model
4. Spectral Image Prediction of Color Halftone Prints Based on Neugebauer Modified Spectral Reflection Image Model
5. Multiresolution-Based Pansharpening in Spectral Color Images