Abstract:
An automatic omni-directional bar code symbol reading system for use in a POS environment. The system comprises a system housing having a horizontal housing section with a first light transmission window, and a vertical housing section with a second light transmission window. A plurality of linear-type bar code symbol reading stations are disposed in the horizontal housing section, for generating and projecting a complex of linear illumination planes through the first light transmission window and into a 3D volume definable relative to the system housing. At least one area-type bar code reading station is disposed in the vertical housing section, for generating and projecting an area illumination beam through the imaging window, and into the 3D volume. The complex of linear illumination planes and the area illumination beam enable the omni-directional reading of bar code symbols on an object passing through the 3D volume, and generation of symbol character data representative of the read bar code symbol. An object detection subsystem automatically detects the object passing through the 3D volume, and generates motion data representative of the detected object motion within the 3D volume. A control subsystem controls operations within the linear-type and area-type bar code symbol reading stations using control data derived from the motion data generated by the object motion detection subsystem.
Abstract:
A method of illuminating objects using adaptively controlled mixing of spectral illumination energy to form and detect digital images of objects at POS environments with sufficiently high image contrast and quality. The method comprises provides, at a POS environment, a digital image capture and processing system having a system housing with an imaging window, and an area-type illumination and imaging station disposed within said system housing, for projecting a coextensive area-type illumination and imaging field (i.e. zone) through said imaging window into a 3D imaging volume during object illumination and imaging operations. As the object is moved through the 3D imaging volume, its motion is automatically detected, and signals indicative of said detected object motion are generated. In response to the generated signals, a first field of visible illumination is produced from an array of visible LEDs, simultaneously with a second field of invisible illumination from a array of infrared (IR) LEDs. These first and second fields of illumination spatially overlap and intermix with each other and are substantially coextensive with the FOV. During object illumination and imaging operations, the relative power ratio (VIS/IR) of these fields of visible illumination and invisible illumination are controlled as one or more digital images of said illuminated object are formed and detected, captured and buffered, and ultimately processed so as to read one or more 1D and/or 2D code symbols graphically represented in the digital images. During object illumination and imaging operations operation, the relative power ratio (VIS/IR) is adaptively controlled to form and detect digital images of objects at POS environments with sufficiently high image contrast and quality.
Abstract:
A digital image capturing and processing system comprising a plurality of coplanar illumination and imaging stations for producing a plurality of coplanar linear illumination and imaging planes which intersect within a 3D imaging volume defined relative to an imaging window. An object motion detection subsystem for automatically detecting the motion of an object passing through the 3D imaging volume, and generating motion data representative of the detected object motion. Each station includes an illumination subsystem having a linear illumination array including a plurality of light emitting devices for producing a substantially planar illumination beam (PLIB), and (ii) an image formation and detection subsystem including a linear image sensing array having optics providing a field of view (FOV) on the linear image detection array, and extending substantially along the PLIB. Each station produces at least one coplanar illumination and imaging plane (PLIB/FOV) which is projected through the imaging window and into the 3D imaging volume, for capturing linear (1D) digital images of objects moving through the 3D imaging volume. Each station also includes an automatic illumination control subsystem for controlling the production of illumination by the illumination subsystem into the 3D imaging volume, as an object is detected moving within the 3D imaging volume. Within each station, an image capturing and buffering subsystem captures and buffers linear digital images produced from the linear image detection array, and a local control subsystem controls operations within the coplanar illumination and imaging station using control data derived from motion data generated by the object motion detection subsystem.
Abstract:
A digital image capture and processing system having a housing with a light transmission window, and an illumination subsystem including an illumination board disposed adjacent the light transmission window, configured substantially within a plane, and having a central aperture mounted adjacent the imaging window. The illumination board supports an array of illumination sources mounted around at least portion of the central aperture, for producing and a field of illumination within the FOV of its image formation and detection subsystem during object illumination and imaging operations. A FOV folding mirror is mounted within the housing and beneath the illumination board, and folds the path of the FOV beneath the light transmission aperture and directs and projects the FOV out through the central aperture. Also, an automatic illumination control subsystem is provided for controlling the array of illumination sources during object illumination and imaging operations.
Abstract:
A POS-centric digital imaging system for installation at a retail point of sale (POS) station having a countertop surface. The POS-centric digital imaging system includes a system housing having at least one imaging window, and providing a cashier side and a customer side for the POS-centric digital imaging system. An omni-directional digital image capturing and processing subsystem is disposed in the system housing, for generating a 3D imaging volume adjacent the imaging window. A cashier/customer terminal is integrated within the system housing, for simultaneously supporting (i) cashier product scanning/imaging and checkout operations on said cashier side, and (ii) customer payment and other services on said customer side.
Abstract:
A device for optically multiplexing a laser beam, having a glass plate construction with an input surface and an output surface, and bearing reflective and semi-reflective coatings arranged so as to optically multiplex an input laser beam entering the input surface, into multiple spatial-coherence reduced output laser beams exiting from the output surface. Through such optical multiplexing, and recombination, the coherence of the resulting laser beam is substantially reduced, as is the power of speckle pattern noise observed at an image detection array detecting an image of an object illuminated by said laser beam.
Abstract:
A laser beam generation system having an integrated coherence reduction mechanism. The system includes: a flexible circuit having a first end portion and a second end portion; a laser diode mounted on the first end portion of the flexible circuit, for producing a laser beam having a central characteristic wavelength; diode current drive circuitry for producing a diode drive current to drive the laser diode and produce said laser beam; and high frequency modulation (HFM) circuitry also mounted on the first end portion of the flexible circuit, for modulating the diode drive current at a sufficiently high frequency to cause the laser diode to produce a laser beam having a spectral side-band components about the central characteristic wavelength, and thereby reducing the coherence as well as coherence length of the laser beam.
Abstract:
A method of illuminating objects using adaptively controlled mixing of spectral illumination energy to form and detect digital images of objects at a POS. The method comprises providing, at a POS environment, a digital image capture and processing system having a system housing with an imaging window, and an area-type illumination and imaging station disposed within said system housing, for projecting a coextensive area-type illumination and imaging field (i.e. zone) through said imaging window into a 3D imaging volume during object illumination and imaging operations. As the object is moved through the 3D imaging volume, its motion is automatically detected, and signals indicative of said detected object motion are generated. In response to the generated signals, a first field of visible illumination is produced from an array of visible LEDs, simultaneously with a second field of invisible illumination from a array of infrared (IR) LEDs. These first and second fields of illumination spatially overlap and intermix with each other to produce a composite wide-area illumination beam that is at least substantially coextensive with the FOV. During object illumination and imaging operations, the relative power ratio (VIS/IR) of these fields of visible illumination and invisible illumination is adaptively controlled as one or more digital images of the illuminated object are formed and detected, captured and buffered, and ultimately processed so as to read one or more 1D and/or 2D code symbols graphically represented in the digital images.
Abstract:
An Automatically-triggered digital video-imaging based code symbol reading system providing a high degree of adaptability to ambient illumination levels and having great dynamic range. The system includes an illumination subsystem, having an active illumination mode and an ambient illumination mode. During object illumination and image capturing operations, the exposure quality of a captured frames of digital video image data is analyzed, and based on the results of such exposure quality analysis, system control parameters (SCPs) are automatically reconfigured. In the event that the exposure quality analysis indicates excessive exposure levels in captured frames of digital video image data, then a new set of SCPs is reconfigured, controlling the illumination subsystem to operate in its ambient illumination mode, whereby, ambient illumination is allowed to flood the field of view and form digital images on the image detection array during object illumination and video-imaging operations.
Abstract:
An omni-directional digital image capturing and processing system for use in a POS environment, comprising a system housing having an imaging window, and a plurality of coplanar illumination and imaging stations, disposed in the system housing, for generating and projecting a complex of coplanar illumination and imaging planes through said imaging window. At least one area-type illumination and imaging station is also disposed in the system housing, for generating and projecting an area-type illumination and imaging zone through the imaging window, which intersects with the complex of coplanar illumination and imaging planes within a 3D imaging volume definable relative to the imaging window, for omni-directional digital imaging of objects passing through the 3D imaging volume. Digital linear images of the object are generated when the object intersects with coplanar illumination and imaging planes, and digital area-type images of the object are generated when the object intersects with the area-type illumination and imaging zone, within the 3D imaging volume during system operation. The system also includes an object motion detection subsystem for automatically detecting the motion of objects passing through the 3D imaging volume, and generating motion data representative of the detected object motion within the 3D imaging volume.