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8.2 Scan Area and Depth of Field
The scan area is within the arc centered on the scan origin as shown in each resolution, which is
measured from the front edge of the scanner.
0"
2"
4"
[ inch ]
[ mm ]
0
50
100
0.127 mm
60
0.15 mm
55
50
Code 39
55
80
(Code39, Environment illumination=500 lux, Temperature = 25˚C)
8.3 Printed Contrast Signal (PCS)
0.3 or higher
<Conditions>
MRD
: 32 % or higher (70% or higher reflectivity of space and quiet zone)
Distance
: 59 mm from the front edge of the scanner
Bar code
: JAN-13, resolution 0.26 mm, PCS 0.3 specified in Section 8.1.
MRD = Minimum reflectance of white space – Maximum reflectance of black bar
Reflectance of white space – Reflectance of black bar
PCS =
* Be sure to keep the optical window clean without dirt or scratches, or it may have a bad effect on the reading
characteristics.
SPECIFICATIONS MANUAL
6"
8"
10"
12"
150
200
250
300
170
190
0.25 mm
300
0.50 mm
Figure 8: Scan Area and Depth of Field
Reflectance of white space
14"
16"
18"
2"
350
400
450
500
400
1.00 mm
NLV-4001
4"
6"
8"
10"
550
600
650
700
700
[Unit: mm]
2nd
11
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