Bar code imagers
First Claim
Patent Images
1. A method of decoding bar codes using a bar code imager device, comprising:
- selectively illuminating, by an annular illumination source, only an annular portion of an axicon optical element of the bar code imager device;
forming, by the axicon optical element in response to the selective illumination of only the annular portion of the axicon optical element, a circular illumination beam;
illuminating a circular portion of a bar code with the circular illumination beam formed by the axicon optical element; and
decoding the barcode using the circular illumination.
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Abstract
Bar code imagers and methods of operating bar code imagers are described herein. One method includes selectively illuminating a portion of an axicon optical element of a bar code imager device, forming, by the axicon optical element in response to the selective illumination of the portion of the axicon optical element, an illumination beam, and illuminating a bar code with the illumination beam formed by the axicon optical element.
30 Citations
19 Claims
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1. A method of decoding bar codes using a bar code imager device, comprising:
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selectively illuminating, by an annular illumination source, only an annular portion of an axicon optical element of the bar code imager device; forming, by the axicon optical element in response to the selective illumination of only the annular portion of the axicon optical element, a circular illumination beam; illuminating a circular portion of a bar code with the circular illumination beam formed by the axicon optical element; and decoding the barcode using the circular illumination. - View Dependent Claims (2, 3, 4, 5)
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6. A method of decoding bar codes using a bar code imager device, comprising;
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illuminating, by an annular illumination source, an axicon optical element of the bar code imager device such that only an annular portion of the axicon optical element is illuminated; forming, by the axicon optical element in response to the illumination of the axicon optical element, a circular illumination beam; illuminating a circular portion of a bar code with the circular illumination beam formed by the axicon optical element; and decoding the bar code using the circular illumination. - View Dependent Claims (7, 8, 9, 10)
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11. A bar code imager device, comprising:
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an axicon optical element; and an annular illumination source; wherein; the annular illumination source is configured to selectively illuminate only an annular portion of the axicon optical element; the axicon optical element is configured to form a circular illumination beam configured to illuminate a circular portion of a bar code in response to the selective circular illumination of only the annular portion of the axicon optical element; and the device is operable to decode the bar code using the circular illumination. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification