公开(公告)号：EP2380109A2

公开(公告)日：2011-10-26

申请号：EP09835886.4

申请日：2009-12-24

申请人： Datalogic Scanning, Inc.

发明人： OLMSTEAD, Bryan, L.

IPC分类号： G06K7/10 ,  G06K9/20 ,  H04M1/00

CPC分类号： G06K7/10831 ,  G06K7/10702 ,  G06K7/10801 ,  G06K7/10861

摘要： Fold mirrors (330) permit the imagers (340) to be closer to each other and permit an optical code reader (280), such as a tunnel scanner, to confine them to a smaller housing volume or capacity. A plurality of sets of fold mirrors (330) can also be employed to convey at least a portion of at least two different perspectives or two different depths of field (341, 343) of a composite view volume (281) to different regions (163, 165) of an image field (156) of a common imager (340). The sets of fold mirrors (330) may also include split mirrors that have mirror components that reflect images from different view volumes (334) to different imagers (340) or different regions (163, 165) of an image field (156) of a single imager (340).

公开(公告)号：EP1797521A2

公开(公告)日：2007-06-20

申请号：EP05802099.1

申请日：2005-09-29

申请人： Datalogic Scanning, Inc.

发明人： OLMSTEAD, Bryan, L.

IPC分类号： G06K7/10

CPC分类号： G06K7/10851 ,  G06K7/1452 ,  G06K7/1478

摘要： Methods and systems better detect edges in a binary optical code. One method constructs a threshold signal to be used for comparison with an equalized undifferentiated scan line signal imperfectly representing a binary optical code. The method comprises detecting peaks in the equalized undifferentiated scan line signal (115), determining midpoints (505) between the successive detected peaks (310), and generating a smooth signal (125) based on the midpoints. The generated signal is the 'threshold signal (125). In one version of the method, the generating step comprises interpolating between successive midpoints so as to result in a signal passing through the midpoints and low-pass filtering the signal passing through the midpoints so as to result in a filtered signal, which is the threshold signal. In another version of the method, the generating step comprises performing regression using the midpoints so as to generate a signal curve that fits the midpoints according to a criterion. Software, digital and analog techniques are described.

公开(公告)号：EP1891575A2

公开(公告)日：2008-02-27

申请号：EP06772683.6

申请日：2006-06-08

申请人： Datalogic Scanning, Inc.

发明人： OLMSTEAD, Bryan, L.

IPC分类号： G06K7/10

CPC分类号： G06K7/10594 ,  G06K7/10693

摘要： The present disclosure provides systems of and methods for reading optical codes located on multiple sides of an item (10) that is being moved through a read volume. In one method, optical symbols are read using a high speed raster laser beam and non-retrodirective collection optics (160) including the steps of moving an item containing an optical code along an item direction past a window (102, 154) disposed in a surface (152) of a scanner housing or platter; via a first scan mechanism, repeatedly scanning through the window at a first slant and/or tilt angle (104, 106, 108, 110) to the surface in a first direction and along a single line to acquire scanned data over two dimensions of one or more sides of the item; via a second scan mechanism, repeatedly scanning through the window at a second slant and/or tilt angle (104, 106, 108, 110) to the surface in a second direction and along a single line to acquire scanned data over two dimensions of one or more other sides of the item; and processing the scanned data acquired. The window may be formed in the shape of a slot (102, 124, 128), the slot being oriented generally transverse to the item direction. A preferred construction is a completely solid state implementation using either a linear imager or an area (2-D) imager in the Scheimpflug condition to image a plane with a depth of field.