Scanning Bar Codes
Bar Code Scanning with 2D Imager
Scanning bar codes with the 2D imaging device is similar to scanning with a laser scanner. The operation and configuration of the scanner is performed in the same way as laser scanning devices. Trigger behavior and scanning time- outs are the same as laser scanning devices.
Scanning Differences
Scanning Aimer
The imager contains an aiming beam rather than a red laser. The aiming beam mimics a laser line for purposes of orienting the imager to a bar code.
Figure 27 shows how the aiming beam visually differs from the laser beam in laser scanning devices.
Figure 27. Laser vs. Imaging beam
Laser | Aiming Beam |
Note that the aiming beam for the imager is green, rather than red.
Orientation
Rotational orientation does not affect the imager module's ability to read bar codes. For example, the imager can read a bar code when the aimer beam is parallel to the lines of the bar code. What is important is the location of the aimer in relation to the center of the bar code. The aiming beam should be centered over the bar code, but it can be positioned in any direction for a good read.
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