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Digital image capture and processing system employing an image formation and detection subsystem having image formation optics providing a field of view (FOV) on an area-type image detection array, and a multi-mode illumination subsystem having near and far field LED-based illumination arrays for illuminating near and far field portions of said FOV

  • US 7,988,053 B2
  • Filed: 01/31/2008
  • Issued: 08/02/2011
  • Est. Priority Date: 11/13/2003
  • Status: Active Grant
First Claim
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1. A digital image capture and processing system comprising:

  • a housing having an imaging window;

    an area-type image formation and detection subsystem, disposed in said housing, and having image formation optics for projecting a field of view (FOV) through said imaging window and onto an area-type image detection array, for forming and detecting 2D digital images of an object in said FOV, during object illumination and imaging operations;

    a multi-mode LED-based illumination subsystem having (i) a near-field LED array for producing a field of wide-area narrow-band illumination over a near field region of said FOV, and (ii) a far-field LED array for producing a field of wide-area narrow-band illumination over a far field region of said FOV, so that said illumination reflects off said object and is transmitted back through said imaging window and onto said area-type image detection array to form said 2D digital images of said object;

    an automatic object presence and range detection subsystem, disposed in said housing, for automatically detecting the presence and range of the object within the near-field region or far-field region of said FOV, and generating an object range detection signal in response to the detection of the presence and range of said object within said FOV;

    an image capturing and buffering subsystem, disposed in said housing, for capturing and buffering 2D digital images detected by said area-type image formation and detection subsystem;

    a digital image processing subsystem for processing 2D digital images captured and buffered by said image capturing and buffering subsystem and reading one or more code symbols graphically represented in said 2D digital images, and generating symbol character data representative of said read code symbols; and

    a system control subsystem, disposed in said housing, for controlling and/or coordinating one or more said subsystems during object illumination and imaging operations.

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