Datalogic Scanning DS4600A User Manual

READING FEATURES 

 
 

 
The traditional way of barcode reading could be called "Linear Reading". In this case, 
the laser beam crosses the barcode symbol from its beginning to its end as shown in 
Figure 27. 

Laser Beam

 

 
In “Advanced Code Reconstruction” mode, it is no longer necessary for the laser 
beam to cross the label from the start to the end. With just a set of partial scans on 
the label (obtained using the motion of the label itself), the DS4600A is able to 
"reconstruct" the barcode. A typical set of partial scans is shown in Figure 28. 
 

Code Direction

 

 
None of the partial scans contains the whole label. The decoder aligns each partial 
scan correctly and combines them in order to obtain the entire code. 
 
The alignment is performed by calculating the time difference from one partial scan to 
another using a reference code element.