Patent ID: 7382456
Filing Date: 2008-06-03
Classification: G01J,G01N

Abstract:
1. A sensor for measuring a plurality of characteristics of a flat sheet product, said sensor comprising: a source for emitting radiation towards the flat sheet product; a plurality of beam splitters arranged in series for splitting the radiation after the radiation interacts with the flat sheet product; a plurality of bandpass filters for filtering the split radiation; a plurality of single channel detectors, each channel detector being coupled to one bandpass filter; and at least one optical spectrometer, wherein the at least one optical spectrometer measures one or more characteristics of said plurality of characteristics of the flat sheet product using said split radiation received from a first beam splitter of said plurality of beam splitters, and each coupled channel detector and bandpass filter measures one or more characteristics of said plurality of characteristics of the flat sheet product using said split radiation received from one or more of said plurality beam splitters, said characteristics measured by each coupled channel detector and bandpass filter being different from said characteristics measured by said spectrometer.