Techniques for miniaturizing bar code scanners including spiral springs and speckle noise reduction
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United States of America Patent
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Sep 9, 2003
Grant Date -
N/A
app pub date -
May 10, 2000
filing date -
May 10, 2000
priority date (Note) -
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Abstract
Various techniques for reducing the size of bar code scanner modules are disclosed including embodiments having miniature moving mirror elements employing spiral tape springs and micro machined structures. Other embodiments employ VCSELs and relatively small collection areas, while minimizing speckle noise through beam shaping and signal processing techniques.
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