Patent ID: 6995845
Filing Date: 2006-02-07
Classification: B01L,G01N

Abstract:
1. A method for detecting at least one analyte held by an optical disc that includes optically readable structures, said method comprising the steps of: providing the optical disc to an optical disc reader, wherein the optical disc includes a first layer which includes a first surface impressed with said optically readable structures which are coated with a first reflective layer, and wherein the optical disc includes a second layer having a second surface, a portion of which is coated with a second reflective layer, the first and second surfaces configured such that the analyte is located therebetween; directing at least one beam of electromagnetic radiation to the optical disc and scanning the beam over the optical disc; acquiring radiation returned from the first and second reflective layers using a detector of the optical disc reader; generating from radiation acquired from the second reflective layer at least one analyte signal that is indicative of the presence of the analyte; and generating from radiation acquired from the first reflective layer operational signals which enable the optical disc reader to track said optically readable structures.