ENHANCED RESOLUTION AUTOMATIC DATA COLLECTION APPARATUS AND METHOD USING AN AFOCAL OPTICAL ELEMENT
First Claim
1. A method for reading data carriers such as machine-readable symbols using an automatic data collection device, the method comprising:
- generating a light beam;
directing the light beam to a scanning mirror;
directing the light beam from the scanning mirror to an afocal optical element, the light beam being incident on the afocal optical element;
using the afocal optical element to change a characteristic associated with a scanning beam; and
exiting the light beam from the afocal optical element as the scanning beam having the changed characteristic and directing the scanning beam having the changed characteristic onto a target machine-readable symbol.
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0 Petitions
Accused Products
Abstract
An automatic data collection device, such as a scanner-type device, is provided with an afocal optical element, such as an afocal lens, that operates in conjunction with a scanning mirror to scan a target machine-readable symbol using a scanning beam. The scanning mirror deflects a light beam into the afocal lens. The afocal lens operates to change a resolution or width of the scanning beam for far-field scanning, for example, where resolution is increased by the afocal lens. The afocal lens can also operate to change the resolution or width of the scanning beam for near-field scanning, for example, where resolution is decreased by the afocal lens.
46 Citations
35 Claims
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1. A method for reading data carriers such as machine-readable symbols using an automatic data collection device, the method comprising:
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generating a light beam;
directing the light beam to a scanning mirror;
directing the light beam from the scanning mirror to an afocal optical element, the light beam being incident on the afocal optical element;
using the afocal optical element to change a characteristic associated with a scanning beam; and
exiting the light beam from the afocal optical element as the scanning beam having the changed characteristic and directing the scanning beam having the changed characteristic onto a target machine-readable symbol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An automatic data collection device to read data carriers such as machine-readable symbols, the automatic data collection device comprising:
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a light source to generate light;
a scanning mirror positioned to have the generated light incident thereon and to deflect the incident light; and
an afocal optical element positioned to receive the deflected light from the scanning mirror and to output a scanning beam derived from the received deflected light, the scanning mirror being movable to move the scanning beam across a target machine-readable symbol. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An automatic data collection device for reading data carriers such as machine-readable symbols, the device comprising:
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means for generating a light beam;
scanning means for deflecting the generated light beam;
afocal means for receiving the deflected light beam from the scanning means and for directing a scanning beam, derived from the received light beam, onto a target machine-readable symbol; and
means associated with the afocal lens for changing a resolution and field of view associated with the scanning beam. - View Dependent Claims (26, 27)
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28. An article of manufacture, comprising:
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a machine-readable medium having instructions stored thereon that are executable by a processor of an automatic data collection device to read data carriers such as machine-readable symbols, by;
causing generation of a light beam that is directed to a scanning mirror positioned to direct the light beam pass through an afocal optical element to enable said afocal optical element to change a resolution or a field of view associated with said light beam;
actuating the scanning mirror to scan the light beam, which has passed through said afocal optical element and which has said associated resolution or field of view changed by said afocal optical element, across a target machine-readable symbol;
evaluating light received from the target machine-readable symbol to determine a property associated with the light beam; and
using the determined property and the afocal optical element to further change said resolution or field of view associated with the light beam scanned across the target machine-readable medium. - View Dependent Claims (29, 30, 31)
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32. A method to manufacture an automatic data collection device for reading data carriers such as machine-readable symbols, the method comprising:
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providing a light source to generate light;
positioning a scanning mirror to have the generated light incident thereon and to deflect the incident light; and
positioning an afocal optical element to receive the deflected light from the scanning mirror and to output a scanning beam derived from the received deflected light, the afocal optical element being usable to change a characteristic associated with the scanning beam and the scanning mirror being usable to move the scanning beam across a target machine-readable symbol. - View Dependent Claims (33, 34, 35)
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Specification