Detection system for use in a sorting apparatus, a method for determining drift in the detection system and a sorting apparatus comprising such detection system
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United States of America Patent
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Jul 7, 2009
Grant Date -
Feb 8, 2007
app pub date -
May 16, 2006
filing date -
May 17, 2005
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Abstract
The present invention is related to a detection system for inspecting a continuous stream of products comprising means for determining the detection system induced variations in its output signal. The detection system comprises a reference element and an intermediate optical element, means for scanning a light beam over the product stream and, via the intermediate optical element, over the reference element and means for converting the light beams re-emitted by the product stream and by the reference element into an electrical signal. The intermediate optical element is positioned such that the light beam successively scans the product stream and at least one region of the reference element, in whatever order. Such detection system and method are of particular use in an apparatus for sorting products, where it is used to inspect products provided to the detection system in a continuous stream.
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