| 摘要 |
<p>This invention provides a point-of-sale scanning device that employs vision sensors and vision processing to decode symbology and matrices of information of objects, documents and other substrates as such objects are moved (swiped) through the field-of-view of the scanning device's window. The scanning device defines a form factor that conforms to that of a conventional laser-based point-of-sale scanning device using a housing having a plurality of mirrors, oriented generally at 45-degree angles with respect to the window's plane so as to fold the optical path, thereby allowing for an extended depth of field. The path is divided laterally so as to reach opposing lenses and image sensors, which face each other and are oriented along a lateral optical axis between sidewalls of the device. The sensors and lenses can be adapted to perform different parts of the overall vision system and/or code recognition process. The housing also provides illumination that fills the volume space. Illustratively, illumination is provided adjacent to the window in a ring having two rows for intermediate and long-range illumination of objects. Illumination of objects at or near the scanning window is provided by illuminators positioned along the sidewalls in a series of rows, these rows directed to avoid flooding the optical path.</p> |
