Sequential scanning of multiple wavelengths
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United States of America Patent
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Aug 19, 2014
Grant Date -
Aug 30, 2012
app pub date -
Feb 24, 2011
filing date -
Feb 24, 2011
priority date (Note) -
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Abstract
A system is provided for identifying at least one physical characteristic of items in a stream of items moving along a path through an inspection zone, and for separating items from the stream of items based upon the at least one physical characteristic. The system includes a movable transversely scanning mirror arranged to reflect electromagnetic energy from the inspection zone onto an array of detectors. The detectors of the array are arranged to sequentially receive electromagnetic energy so that on each transverse scan of the mirror for any given sub-zone within the inspection zone the detectors of the array receive electromagnetic energy reflected from the mirror at different times. The controller is then operable to correlate input signals from the various detectors corresponding to detected levels of electromagnetic energy received at different times from each given sub-zone within the inspection zone.
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