Patent ID: 8227742
Filing Date: 2012-07-24
Classification: G06F

Abstract:
1. An optical control system comprising: a plurality of optical emitters and a plurality of optical detectors defining therebetween an area of optical paths whereby the transmission of energy between an emitter and a detector may be modulated by an optical interaction occurring in the vicinity of said area, wherein at least one of said detectors is positioned to receive optical energy from more than one of said optical emitters; drive circuitry for driving a plurality of said optical emitters simultaneously according to a modulation scheme in which each emitter is modulated with a different modulation function, said functions being orthogonal relative to one another; correlation means associated with said at least one detector for receiving an output therefrom and for correlating said output with at least those modulation functions driving the emitters which said at least one detector is positioned to receive optical energy from, to thereby determine the amount of energy incident on said at least one detector from each of said emitters.