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

• Current Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Original Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Inventors: Zhu, Xiaoxun, Veksland, Michael, Ren, Jie, Knowles, C. Harry, Au, Ka Man, Giordano, Patrick, Allen, Christopher, Yan, Weizhen, Smith, Taylor, De Foney, Shawn, Mandal, Sudhin, Wilz, David M. Sr., Kotlarsky, Anatoly, Miraglia, Michael V.
• Primary Examiner(s): Kim; Ahshik
• Application Number:
  US12/012,204
• Publication Number:
  US 20080277478A1
• Time in Patent Office: 1,279 Days
• Field of Search: 235/462.42, 235/462.24, 235/462.01, 235/462.09
• US Class Current: 235/462.42
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/10752 Exposure time control
• CPC Class Codes: G06K 7/10821 further details of bar or optical code scanning devices
• CPC Class Codes: G06K 7/109 adaptations to make the hand-held scanner useable as a fixed scanner

Abstract

A digital image capture and processing system including a housing having an imaging window. An area-type image formation and detection subsystem is disposed in the housing, and has image formation optics for projecting a field of view (FOV) through the imaging window and onto an area-type image detection array, for forming and detecting 2D digital images of an object in the FOV, during object illumination and imaging operations. The housing also includes 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 the FOV. During object illumination and imaging operations, illumination from illumination arrays reflects off the object and is transmitted back through the imaging window and onto the area-type image detection array to form 2D digital images of the object.

Claims

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.

2. The digital image capture and processing system of claim 1, which further comprises an object targeting subsystem for generating a linear or narrow-area object targeting illumination beam within said FOV.

3. The digital image capture and processing system of claim 1, which further comprises an input/output subsystem, disposed in said housing, for outputting processed image data, including symbol character data, to an external host system or other information receiving or responding device.

4. The digital image capture and processing system of claim 1, which further comprises an object targeting illumination subsystem, disposed in said housing, for generating and projecting a targeting illumination beam within a portion of said FOV, in response to the generation of said object range detection signal.

5. The digital image capture and processing system of claim 4, wherein said targeting illumination beam is momentarily switched off while said near-field or far-field LED illumination array is producing said field of wide-area narrow-band illumination within said FOV and said area-type image detection array is detecting said 2D digital image of said detected object within said FOV, during object illumination and imaging operations.

6. The digital image capture and processing system of claim 1, wherein said housing is capable of being supported within the hand of an operator.

7. The digital image capture and processing system of claim 1, wherein said housing capable of being supported on a countertop surface.

8. The digital image capture and processing system of claim 1, wherein said code symbols are selected from the group consisting of 1D and/or 2D bar code symbols, PDF symbols and data matrix symbols.

9. The digital image capture and processing system of claim 1, wherein said near-field illumination array and said far-field LED illumination array each comprises an LED array having a plurality of visible LEDs.

10. The digital image capture and processing system of claim 1, wherein said system control subsystem responds to said object range detection signal, and activates (i) said near-field LED array when said object is detected within said near field region of said FOV, and (ii) said far-field LED array when said object is detected within said far field region of said FOV.