Holographic scanning system with high-resolution 2-D a scanning field steerable within 3-D scanning volume
First Claim
1. A code symbol reading system comprising:
- a first scanner including a holographic scanning disc having a plurality of holographic optical elements supported thereon, for scanning a laser beam and producing a first laser scanning pattern within a 3-D scanning volume for scanning a code symbol contained therein, detecting the location of said code symbol within said 3-D scanning volume, and producing location data indicative of said location; and
a second scanner for scanning the region in which the code symbol is detected, and collecting scan data for decode processing.
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Abstract
A code symbol reading system comprising first and second scanners. The first scanner employs a holographic scanning disc to generate an omnidirectional laser scanning pattern within a large 3-D scanning volume. The first scanner detects the location of a code symbol within the 3-D scanning volume and produces data indicative of its location therewithin. Using this location data, the second scanner produces a high density scanning pattern to aggressively scan the region in which the code symbol has been detected, and collect scan data for decode processing. By virtue of the system and method of the present invention, it is now possible to read bar code symbols located anywhere within very large volume of space, with a high degree of accuracy hitherto impossible using prior art techniques.
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Citations
5 Claims
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1. A code symbol reading system comprising:
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a first scanner including a holographic scanning disc having a plurality of holographic optical elements supported thereon, for scanning a laser beam and producing a first laser scanning pattern within a 3-D scanning volume for scanning a code symbol contained therein, detecting the location of said code symbol within said 3-D scanning volume, and producing location data indicative of said location; and a second scanner for scanning the region in which the code symbol is detected, and collecting scan data for decode processing. - View Dependent Claims (2, 3, 4, 5)
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Specification