INTEGRATING THE SCANNER TO READ AT THE PROPER DISTANCE
308
MAGELLAN™ 900I
INTEGRATING THE SCANNER TO READ AT THE PROPER
DISTANCE
The scanner must be positioned so that the scan volume and illumination light will cover
the entire bar code. The scan volume is shown in
Figure 11 on page 308. The combination of
the Scan Volume and the illumination light is called the Field of View. Designing around the
scanner Field of View is explained more in the following section.
Figure 11 - Scanner Volume
DESIGN OF THE SCANNER OPENING
A typical system uses the scanner mounted inside a host enclosure with an opening for the
scanner Field of View to exit the scanner window and read bar codes. If the scanner is flush
against the opening, it should be the size of the scanner window at a minimum, but only
exposing as much of the front surface of the scanner as necessary. Additional clearance in
the opening can also be considered for the speaker opening.
The design and placement of the scanner opening within a host enclosure is critical for opti-
mum system performance. Use the detailed dimensions shown in
Figure 5 on page 6 to
design the host enclosure and scanner opening along with the following guidelines.
• The opening must not block any of the outgoing illumination light, described by
dimensions of the scanner Field of View.
• Ensure that there are no reflective surfaces around the area of the scanner opening.
• The opening or other parts of the host enclosure must not enter the Field of View in
order to allow the bar code image to be captured by the scanner.
To Next Page
Loading...
