A colorimeter method and apparatus is described that is used to accurately deduce the color of a source which is varying in intensity with respect to time. The colorimeter consists of a plurality of sensors with varied spectral responsivity, a means of shielding these sensors from the effects of ambient...http://www.google.com.au/patents/US5892585?utm_source=gb-gplus-sharePatent US5892585 - Colorimeter for measurement of temporally variant light sources
