Holographic laser scanning system for laser scanning of bar code symbols within 3-D scanning volume having a large depth field
First Claim
1. A holographic laser scanning system for producing a highly defined 3-D scanning volume for laser scanning bar code symbols therein having a minimum element width on the order of about 0.017 inches or less, said holographic laser scanning system comprising:
- a housing;
a plurality of laser sources disposed within said housing, for producing a plurality of laser beams;
holographic scanning disc disposed within said housing, rotating about an axis of rotation, and having a plurality of holographic optical elements for scanning said plurality of laser beams and producing a plurality of laser scanning planes for scanning a code symbol, each said laser scanning plane having predefined beam characteristics and being spatially confined within a highly defined 3-D scanning volume having at least three focal zones, a depth of field of at least 10 inches, and a scanning volume of at least 1,440 cubic inches;
a plurality of photodetectors disposed within said housing, each said photodetector being associated with one said laser source and being capable of detecting laser light reflected off a code symbol scanned by the laser beam produced by said associated laser source;
wherein said plurality of laser scanning planes intersect within said highly defined 3-D scanning volume and said predefined beam characteristics of said laser scanning planes cooperate within said 3-D scanning volume so as to produce a laser scanning pattern for scanning therewithin, code symbols having a minimum element width on the order of about 0.017 inches or less.
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Accused Products
Abstract
A holographic laser scanning system for producing a highly defined 3-D scanning volume for omni-directional laser scanning of bar code symbols therein having a minimum element width on the order of about 0.017 inches or less. The holographic laser scanning system comprises a housing, a plurality of laser sources, a holographic scanning disc and a plurality of photodetectors. The plurality of laser sources are disposed within the housing, for producing a plurality of laser beams. The holographic scanning disc is disposed within the housing, and has a plurality of holographic optical elements for scanning the laser beams and producing a plurality of laser scanning planes for scanning a code symbol. Each laser scanning plane has predefined beam characteristics and is spatially confined within a highly-defined 3-D scanning volume having at least three focal zones, a depth of field of at least 10 inches, and a scanning volume of at least 1,440 cubic inches. The plurality of laser scanning planes intersect within the highly defined 3-D scanning volume and the predefined beam characteristics of the laser scanning planes cooperate within the highly defined 3-D scanning volume so as to produce an omnidirectional laser scanning pattern for omnidirectional scanning therewithin, code symbols having a minimum element width on the order of about 0.017 inches or less.
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Citations
8 Claims
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1. A holographic laser scanning system for producing a highly defined 3-D scanning volume for laser scanning bar code symbols therein having a minimum element width on the order of about 0.017 inches or less, said holographic laser scanning system comprising:
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a housing;
a plurality of laser sources disposed within said housing, for producing a plurality of laser beams;
holographic scanning disc disposed within said housing, rotating about an axis of rotation, and having a plurality of holographic optical elements for scanning said plurality of laser beams and producing a plurality of laser scanning planes for scanning a code symbol, each said laser scanning plane having predefined beam characteristics and being spatially confined within a highly defined 3-D scanning volume having at least three focal zones, a depth of field of at least 10 inches, and a scanning volume of at least 1,440 cubic inches;
a plurality of photodetectors disposed within said housing, each said photodetector being associated with one said laser source and being capable of detecting laser light reflected off a code symbol scanned by the laser beam produced by said associated laser source;
wherein said plurality of laser scanning planes intersect within said highly defined 3-D scanning volume and said predefined beam characteristics of said laser scanning planes cooperate within said 3-D scanning volume so as to produce a laser scanning pattern for scanning therewithin, code symbols having a minimum element width on the order of about 0.017 inches or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification