%0 Journal Article %T Development of an isotropic optical light source for testing nuclear instruments %A Zachary W. Yokley %A S. Derek Rountree %A R. Bruce Vogelaar %J Physics %D 2015 %I arXiv %X Nuclear instruments that require precise characterization and calibration of their optical components need well-characterized optical light sources with the desired wavelength, intensity, and directivity. This paper presents a novel technique for determining the performance of optical components by producing an isotropic-like source with a robotically positioned LED. The theory of operation for this light source, results of Monte Carlo validation studies, and experimental results are presented. %U http://arxiv.org/abs/1511.02496v1