Laser scanning system having multiple laser scanning stations for producing a 3-D scanning volume substantially free of spatially and temporally coincident scanning planes
First Claim
1. A laser scanning system for producing a 3-D scanning volume substantially free of spatially and temporally coincident laser scanning planes, said laser scanning system comprising:
- a housing;
a plurality of laser sources disposed within said housing, for producing a plurality of laser beams;
a laser beam scanning mechanism disposed within said housing, for scanning said plurality of laser beams and producing within a 3-D scanning volume, a plurality of laser scanning planes for scanning a code symbol;
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; and
wherein substantially none of said laser scanning planes within said 3-D scanning volume are spatially and temporally coincident with any other laser scanning plane in order to ensure that there is substantially zero cross-talk at said plurality of photodetectors.
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Accused Products
Abstract
A holographic laser scanner of ultra-compact design capable of reading bar and other types of graphical indicia within a large scanning volume using holographic optical elements and visable laser diodes. The holographic optical elements are arranged on the scanning disc in such a manner so that none of the laser scanning planes generated within the 3-D scanning volume of the system are spatially and temporally coincident with any other laser scanning plane within the 3-D scanning volume. This novel feature of the present invention ensures that there is substantially zero cross-talk at the plurality of photodetectors provided within the system, significantly improving the performance of the system.
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Citations
11 Claims
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1. A laser scanning system for producing a 3-D scanning volume substantially free of spatially and temporally coincident laser scanning planes, said 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;
a laser beam scanning mechanism disposed within said housing, for scanning said plurality of laser beams and producing within a 3-D scanning volume, a plurality of laser scanning planes for scanning a code symbol;
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; and
wherein substantially none of said laser scanning planes within said 3-D scanning volume are spatially and temporally coincident with any other laser scanning plane in order to ensure that there is substantially zero cross-talk at said plurality of photodetectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification