BIOPTICAL POINT-OF-SALE (POS) SCANNING SYSTEM EMPLOYING DUAL POLYGON-BASED LASER SCANNING PLATFORMS DISPOSED BENEATH HORIZONTAL AND VERTICAL SCANNING WINDOWS FOR 360° OMNI-DIRECTIONAL BAR CODE SCANNING
First Claim
1. A bioptical laser scanning system capable of scanning a bar code symbol locate on the surface of an object presented within a 3-D scanning volume at any orientation and from any direction at a point of sale (POS) station, said bioptical laser scanning system;
- comprising;
a horizontal section integrally connected to a vertical section;
a horizontal-scanning window formed in said horizontal section;
a vertical-scanning window formed in said vertical section, and being substantially orthogonal to said bottom-scanning window;
a first plurality of laser beam folding mirrors disposed within said horizontal section;
a second plurality of laser beam folding mirrors disposed within said vertical section;
a first laser beam production module for producing first laser beam, and a second laser beam production module for producing a second laser beam;
a first polygonal scanning element disposed within said horizontal section and having multiple reflective surfaces rotating about a first axis of rotation, for scanning said first laser beam and producing a first laser scanning beam that reflects off said first plurality of laser beam folding mirrors to generate and project a first plurality of laser scanning planes through said horizontal-scanning window; and
a second polygonal scanning element disposed within said vertical section and having multiple reflective surfaces rotating about a second axis of rotation, for scanning said second laser beam and producing a second laser scanning beam that reflects off said second plurality of laser beam folding mirrors to generate and project a second plurality of laser scanning planes through said vertical-scanning window, whereby said first and second pluralities of laser scanning planes (i) intersect within predetermined scan regions contained within a 3-D scanning volume defined between said horizontal-scanning and vertical-scanning windows, and (ii) generate a plurality of groups of quasi-orthogonal laser scanning planes within said 3-D scanning volume, and wherein said plurality of groups of quasi-orthogonal laser scanning planes form a complex omni-directional 3-D laser scanning pattern within said 3-D scanning volume capable of scanning a bar code symbol located on the surface of an object presented within said 3-D scanning volume at any orientation and from any direction at said POS station.
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Abstract
A bioptical laser scanning system employing a plurality of laser scanning stations about a two independently controlled rotating polygonal mirrors. The system has an ultra-compact construction, ideally suited for space-constrained retail scanning environments, and generates a 3-D omnidirectional laser scanning pattern between the bottom and side-scanning windows during system operation. The laser scanning pattern of the present invention comprises a complex of quasi-orthogonal laser scanning planes, including a plurality of substantially-vertical laser scanning planes for reading bar code symbols having bar code elements (i.e. ladder type bar code symbols) that are oriented substantially horizontal with respect to the bottom-scanning window, and a plurality of substantially-horizontal laser scanning planes for reading bar code symbols having bar code elements (i.e. picket-fence type bar code symbols) that are oriented substantially vertical with respect to the bottom-scanning window.
89 Citations
27 Claims
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1. A bioptical laser scanning system capable of scanning a bar code symbol locate on the surface of an object presented within a 3-D scanning volume at any orientation and from any direction at a point of sale (POS) station, said bioptical laser scanning system;
- comprising;
a horizontal section integrally connected to a vertical section;
a horizontal-scanning window formed in said horizontal section;
a vertical-scanning window formed in said vertical section, and being substantially orthogonal to said bottom-scanning window;
a first plurality of laser beam folding mirrors disposed within said horizontal section;
a second plurality of laser beam folding mirrors disposed within said vertical section;
a first laser beam production module for producing first laser beam, and a second laser beam production module for producing a second laser beam;
a first polygonal scanning element disposed within said horizontal section and having multiple reflective surfaces rotating about a first axis of rotation, for scanning said first laser beam and producing a first laser scanning beam that reflects off said first plurality of laser beam folding mirrors to generate and project a first plurality of laser scanning planes through said horizontal-scanning window; and
a second polygonal scanning element disposed within said vertical section and having multiple reflective surfaces rotating about a second axis of rotation, for scanning said second laser beam and producing a second laser scanning beam that reflects off said second plurality of laser beam folding mirrors to generate and project a second plurality of laser scanning planes through said vertical-scanning window, whereby said first and second pluralities of laser scanning planes (i) intersect within predetermined scan regions contained within a 3-D scanning volume defined between said horizontal-scanning and vertical-scanning windows, and (ii) generate a plurality of groups of quasi-orthogonal laser scanning planes within said 3-D scanning volume, and wherein said plurality of groups of quasi-orthogonal laser scanning planes form a complex omni-directional 3-D laser scanning pattern within said 3-D scanning volume capable of scanning a bar code symbol located on the surface of an object presented within said 3-D scanning volume at any orientation and from any direction at said POS station. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12)
- comprising;
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7. The bioptical laser scanning system of 6, wherein said second plurality of laser beam folding mirrors and said second laser production module cooperate with a third light collecting/focusing optical element and a third photodetector disposed within said vertical housing section to form third scanning station disposed about said second polygonal scanning element, and
wherein the light collecting/focusing optical element within said third laser scanning station collects light from predetermined scan regions within said 3-D scanning volume and focuses such collected light onto the photodetector to produce an electrical signal having an amplitude proportional to the intensity of light focused thereon, and said electrical signal being supplied to analog/digital signal processing circuitry for processing analog and digital scan data signals derived therefrom to perform bar code symbol reading operations.
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13. A bioptical laser scanning system capable of scanning a bar code symbol located on the surface of an object presented within a 3-D scanning volume at any orientation and from any direction at a point of sale (POS) station, said bioptical laser scanning system comprising:
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a housing having a bottom housing section integrally connected to a side housing section;
a bottom-scanning window provided in said bottom housing section;
a side-scanning window provided in said side housing section, and being substantially orthogonal to said bottom-scanning window;
a first plurality of laser beam folding mirrors disposed within said bottom housing section;
a second plurality of laser beam folding mirrors disposed within said side housing section;
a first laser beam production module for producing a first laser beam, and a second laser beam production module for producing a second laser beam;
a first polygonal scanning element disposed within said bottom housing section and having multiple reflective surfaces rotating about a first axis of rotation, for scanning said first laser beam and producing a first laser scanning beam that reflects off said first plurality of laser beam folding mirrors to generate and project a first plurality of laser scanning planes through said bottom-scanning window, and a second polygonal scanning element disposed within said side housing section and having multiple reflective surfaces rotating about a second axis of rotation, for scanning said second laser beam and producing a second laser scanning beam that reflects off said second plurality of laser beam folding mirrors to generate and project a second plurality of laser scanning planes through said side-scanning window, whereby said first and second pluralities of laser scanning planes (i) intersect within predetermined scan regions contained within a 3-D scanning volume defined between said bottom-scanning window and side-scanning window, and (ii) generate a plurality of groups of quasi-orthogonal laser scanning planes within said 3-D scanning volume, and wherein said plurality of groups of quasi-orthogonal laser scanning planes form a complex omni-directional 3-D laser scanning pattern within said 3-D scanning volume capable of scanning a bar code symbol located on the surface of an object presented within said 3-D scanning volume at any orientation and from any direction at said POS station. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A bioptical laser scanning system, wherein a single visible laser diode (VLD) is used to create a laser scanning pattern projected through a side-scanning window.
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26. A bioptical laser scanning system which generates a plurality of quasi-orthogonal laser scanning planes that project through a bottom-scanning window and a side-scanning window to provide 360 degrees of scan coverage at a POS station.
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27. A bioptical laser scanning system providing 360 degrees of scan coverage at a POS station comprising a means for producing a plurality of pairs of quasi-orthogonal laser scanning planes that are projected within predetermined scanning regions contained within a 3-D scanning volume defined between bottom and side scanning windows of the system.
Specification