Patent ID: 7805081
Filing Date: 2010-09-28
Classification: G01J,G01N

Abstract:
1. A method of detecting optical signals, comprising: simultaneously illuminating over time each of a plurality of fluid confinements on a substrate with an excitation radiation to produce at least first and second optical signals from each fluid confinement; the at least first and second optical signals produced during the occurrence of different reactions of chemical species, wherein at least one of the chemical species is immobilized on the substrate within each fluid confinement and a chemical species with which it reacts is fluid borne, and the first and second optical signals occurring at different times within each fluid confinement wherein the first optical signal comprises a wavelength different from a wavelength of the at least second optical signal; passing the at least first and second optical signals through an optical train that transmits the first and second optical signals in divergent paths; receiving the first and second optical signals at different locations on one optical detector.