Optical reader system for substrates having an optically readable code
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United States of America Patent
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Dec 18, 2012
Grant Date -
May 19, 2011
app pub date -
Jan 26, 2011
filing date -
Aug 20, 2002
priority date (Note) -
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Abstract
An optical reader system including a source light assembly that has a code-reading beam and a fluorescence-excitation beam that are configured to illuminate encoded substrates. The substrates have optically readable codes that provide output signals when the code-reading beam is incident thereon. The output signals are indicative of the codes. The reader system also includes a fluorescence detector that is configured to detect fluorescent signals from the substrates and code pickup optics that are configured to project the output signals from the optically readable codes onto a Fourier plane. The reader system also includes a code detector that is positioned to detect the output signals in the Fourier plane.
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