1. A method of determining positional information of a target object in a field of view, the method including: scanning a field of view by selectively illuminating respective ones of a plurality of directionally oriented light sources that have overlapping fields of illumination; measuring one or more differences in intensity of returning light emitted from the respective light sources and reflected from the target object using a sensor; and determining positional information of the target object based at least in part upon one or more measured differences in intensity of the returning light.